D758 Motor Purge Manual
D758 MiniPurge Manual
ML 434
IMPORTANT NOTE
It is essential for safety that the installer and user of the Expo system observe
the following instructions:
Please refer to the standard for principles and definitions.
(N.B. These instructions apply only to the Pressurizing system. It is the responsibility of the manufacturer
of the Pressurized Motor Enclosure to provide appropriate instructions for the Enclosure.)
Contents
1.
D758 MiniPurge - General System Specification
2.
Quick User Guide
3.
Application Suitability
4.
Description and Principle of Operation
5.
Main Components
6.
Installation of the System
7.
Commissioning
8.
Maintenance of the System
9.
Fault Finding
10.
Recommended Spares List
11.
Drawings and Diagrams
12.
Certificates
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1. D758 MiniPurge - General System Specification
Pressurized Motor Housing
Pressurized Motor Enclosure : A range of Electrical Motor housings
Classification
: Zone 1 Group IIC
Total Purge Flow Rate
: To be determined by customer and to include flow to compensate for leakage.
Estimated Purge Time
: To be determined by motor manufacturer dependent on the flow rate selected
& motor volume. Time may also be verified by a Purge Test when required.
Enclosure Pressure
: Normal : 10mbarg. (Alternative set-points are available) This is also the set point
of the Automatic Leakage Compensation Pressure Sensor (CLAPS Sensor).
: Relief Valve opening pressure, Calibration range = 20 – 50mbarg
Enclosure Test Pressure
: Motor Test pressure = Relief Valve opening pressure x 1.5.
MiniPurge Control Unit Data
Model Number
: 5XLC/ss/OV/PA/PC
Special Design Number: D758SYS
Option codes
: OV = Outlet Valve is pneumatically operated
PA = Integral Ex e Power & Alarm terminal box
PC = Pressurized Enclosure (Motor) Pressure Control Automatic
Leakage Compensation Valve (CLAPS system)
Action on Pressure Failure : Alarm and Trip (Isolate power / motor) User adjustable “Alarm Only”
System Type
: ThinMani MiniPurge System
Type of Operation
: Automatic Leakage Compensation using the “Closed Loop Automatic
Pressurization System” (CLAPS)
Leakage Compensation capacity
: 1500Nl/min @ 5barg inlet pressure
Leakage Compensation over capacity
: +40% (minimum) of the normal enclosure leakage
Enclosure Material
: Stainless Steel 316
Mounting method
: Wall mounting straps & spacers. Fixing holes as per drawing.
Temperature Limits
: -20ºC to +55ºC
Supply Pressure
: Clean Dry Oil Free Air or Inert Gas. Pressure 5 – 8 barg (75 – 120 psig).
50 micron automatic drain supply Inlet Filter and 16 barg regulator fitted.
Logic Regulator & Gauge
: Fitted. Set to 2.1 barg (31 psig).
Process Connections
: Purge Supply and Outlet to Motor:1” NPT female
Minimum Supply Line 25mm (1”) I.D Tube
Reference points & signals: 1/8” NPT female
Visual Indicators
: Alarm/Pressurized (“Red” / Green)
: System Purging (Black / “Yellow”)
Manual/Override Switch
: Not fitted.
Motor Interlock Switch
: DPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6
System Purging Switch
: SPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6
Alarm Switch
: SPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6
Intermediate Switch
: SPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6
Signal Junction box
: Stainless Steel, Ex e IIC T5 Gb IP66, Tamb: -20ºC to +55ºC
c/w terminals, front access cover & lower removable gland plate.
: Stainless Steel, Ex e IIC T4 Gb IP66, Tamb: -20ºC to +60ºC
c/w terminals, front access cover & lower removable gland plate.
Sensors (-0, +0.7 mbar)
: Minimum Pressure calibration range:
Other Sensors (-0, +10%)
: Intermediate Sensor calibration range:
: Purging Flow OK set at 6.4 mbarg
: CLAPS Sensor calibration range:
Minimum :
Maximum :
Default setting:
Minimum :
Maximum :
Default setting:
0.5 mbarg
5.0 mbarg
1.5 mbarg
2.0 mbarg
10.0 mbarg
5.0 mbarg
Minimum :
Maximum :
Default setting:
5.0 mbarg
15.0 mbarg
10.0 mbarg
NOTE: There must be a 1.5 mbarg difference between the Minimum Pressure & Intermediate Sensor
and a 2.5 mbarg difference between the Intermediate & CLAPS Sensor calibration point.
e.g. Minimum Pressure = 5 mbarg, Intermediate Pressure = 6.5 mbarg, CLAPS Sensor = 9 mbarg
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Purge Time
: User selectable. 3-off time increments available.
10, 15 or 20 Minutes (-0 + 25%). Giving a maximum available purge time
period of 45 minutes. Default set to 45 Minutes.
Approvals
:ATEX Certificate:
0518
Sira 01ATEX1295X
II 2 (2) G D
Ex [px] IIC T6 Gb
Ex [p] IIIC T85ºC Db
Tamb -20ºC +55ºC
IECEx Certificate:
IECEx SIR07.0027X
Ex [px] IIC T6 Gb
Ex [p] IIIC T85ºC Db
Tamb -20ºC +55ºC
INMETRO - TÜV Certificate: TÜV 12.1462X
Ex [px] IIC T6 Gb
Ex [p] IIIC T85ºC Db
-20°C ≤ Ta ≤ +55°C
For limitations and conditions of use refer to the applicable
certificate at the back of this manual.
Weight
: 27kg (60lb)
Relief Valve (RLV) / Purge Outlet Valve with Integral Spark Arrestor
Type
: RLV104/ss/FS
Special Design Number: D758RLV
Bore
: Purge Outlet Valve Ø104 mm, Relief Valve Ø75 mm
Relief Valve lift–off calibration
: Minimum
20.0 mbarg, (+0%, -20%)
: Maximum
50.0 mbarg
: Default
30.0 mbarg
Flow rate
: Factory set to
2000, 3000, 4000, 5000 or 6000 Nl/min.
Default
2000 Nl/min
Material
: Housing:
Stainless Steel 316L, finish as Control Unit
: Gasket :
Neoprene
: Spark Arrestor
Stainless Steel mesh
Mounting method
: Rectangular cut-out & fixing holes as per drawing.
Weight
: 7kg (15.4lb)
Options
Part Number
KGM-PR00-008
KMP-1SP0-001
Description
Extended timer option for additional 60 minute timer.
System Purging switch option kit. (see drawing AGM-PA00-021)
SPNO electrical switch, contact ratings 250Vac
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2. Quick User Guide
Installation
• Mount the purge system as shown on the Hook-Up drawing.
• Always ensure the system has been installed as per the full instructions in section of this manual
titled ‘Installation of the System’.
• Always ensure all piping is clean and free of dirt & debris prior to connection to the purge system
or enclosure.
• Strongly recommend a local isolation valve on the air supply to the purge system is installed.
Note: Most faults are due to the air supply being restricted, the air supply pipe work installed
being too small or a drop in air supply pressure during purge.
Operation of the System
• Once installed correctly turn on air supply.
Indicator
Colour
Alarm/Pressurized Red
Purging
Black
•
Purge system starts off in purge.
• the purge air will enter the enclosure
• within the Relief Valve unit, Purge Outlet Valve will open
• the air will then exit the Relief Valve housing, via the Spark Arrestor
Indicator
Alarm/Pressurized
Purging
•
Colour
Green
Black
Status
Pressurized, Enclosure pressure has been attained
Purge flow too low
Once enough purge air flow is measured the system will start the timed purge cycle.
Start a stopwatch when the Purging Indicator turns “Yellow”.
Indicator
Colour
Alarm/Pressurized Green
Purging
Yellow
•
Status
Pressure Alarm, enclosure pressure too low
Purge flow too low, (or not in the purge mode)
Status
Pressurized
Purge Flow above the minimum
After the purge has been completed without interruption, for the set purge time, the system will
show Purge Complete. Stop the stopwatch when the Purging Indicator turns “Black”.
Indicator
Colour
Alarm/Pressurized Green
Purging
Black
Status
Pressurized and in Leakage Compensation mode.
No longer in the purge mode
Check that the purge time required has been met or exceeded by the actual purge time recorded.
The actual purge time recorded must NEVER be less than the purge time required.
•
System is now in Leakage Compensation mode and working correctly
If the system has not worked as expected check the installation thoroughly. Read the section in this
manual called “Commissioning.”
If an obvious problem has not been highlighted and corrected then follow the checks in the section
“Fault Finding”.
If the checks have been made and the system will still not work then please contact your local
distributor or EXPO.
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3. Application Suitability
MiniPurge Systems are certified for use in Hazardous Areas, where the Hazardous Area is nonmining (i.e. above ground) and the hazard is caused by flammable gasses, vapors or dust.
Depending on the model, the systems may be used in IECEx and ATEX Zone 1(21) and Zone 2(22)
- Categories 2 and 3 respectively.
MiniPurge systems may be used for hazards of any gas group. However, apparatus associated with
the MiniPurge system, such as intrinsically safe signaling circuits and flameproof enclosures
containing switching devices may be limited in their gas group. The certification documentation
supplied with any such devices must be checked to ensure their suitability.
This system is designed for use primarily with compressed air. Where other inert compressed
gasses are used (Nitrogen, for example) the user must take suitable precautions so that the build up
of the inert gas does not present a hazard to health. Consult the Control of Substances Hazardous to
Health (COSHH) data sheet for the gas used. Where a risk of asphyxiation exists, a warning label
must be fitted to the Pressurized Enclosure (PE).
The following materials are used in the construction of MiniPurge systems. If substances that will
adversely affect any of these materials are present in the surrounding environment, please consult
Expo for further guidance.
Materials of construction:
• Stainless Steel
• Mild (carbon) Steel
• Brass
•
•
•
Aluminum
Nylon
Polyurethane
•
•
•
Acrylic
Silicone Rubber
Neoprene
4. Description and Principle of Operation
The MiniPurge system is pneumatic in operation, with electric interfaces.
“Pressurization” is a method of protection used in Zone 1 and Zone 2 Hazardous Locations to ensure
that the interior of an electrical enclosure, for example the motor housing, is free of flammable gas.
With the utilization of the Expo MiniPurge system, the motor may be used safely in a hazardous
environment.
Pressurization is simple. Clean uncontaminated compressed air, or an inert gas, from a nonhazardous area is admitted to the motor enclosure to keep the internal pressure at least 0.5 mbar
above the pressure outside. External flammable gas cannot enter the enclosure while it is
pressurized.
Before power can be switched on, the enclosure must be “purged” to remove any flammable gas that
might have entered the enclosure before it was pressurized. “Purging” is the action of replacing the
air inside an enclosure with air known to be free of flammable gas. The duration of the “purging” time
is normally ascertained on an electrical motor by performing a “Purge Test”.
At the end of the “Purging” cycle the system automatically switches to Leakage Compensation mode.
The Purge Outlet Valve is closed and the flow of purging air is reduced to a level where there is
enough flow of air to compensate merely for the leakage of air from the enclosure whilst maintaining
the minimum over-pressure state. Interface contacts are provided within the system to provide an
interlock to the motor control gear.
In the event of pressure failure within the motor housing the system will raise an alarm in the form of
visual indicators and a volt free contact depending on the specification of the system. The default
action on loss of pressurization by the MiniPurge is “Alarm and Automatic Disconnect of Power”
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(A&T – Alarm and Trip). This can be changed by the customer to “Alarm Only” (AO), please refer to
Section titled ‘Main Components’ - “Alarm Only” circuit.
The Motor MiniPurge system incorporates a "Closed Loop Automatic Pressurization System"
(CLAPS) whereby the system will detect a fall or rise in the motor internal pressure & automatically
compensate by increasing or decreasing the leakage compensation flow rate into the motor. This
system has been specifically designed to maintain a stable internal motor pressure during motor
start-up when pressure peaks or drops are particularly prevalent or when changes in pressure are
caused by running temperature variations.
5. Main Components
Air Supply Filter/Regulator:
The unit is provided with a 50-micron liquid / dust filter element as a precaution. The user of the
MiniPurge system must ensure that air supply is to the quality stated in ‘Air Supply Quality'
paragraph found in the Installation section. The regulator is factory set to 5 barg (75 psig) and will
regulate the pressure of an air supply between 5-16 barg (75-240 psig). A pressure gauge is fitted
down stream of the filter. This should indicate no less than 5 barg (75 psig). During purge you may
notice the pressure drop down to 2.5 barg (36 psig).
Logic Air Supply Regulator:
This device provides the system with a stable logic pressure supply for consistent operation. The
pressure level is factory set to 2.1 barg (31 psig) and can be verified by means of the integral
pressure gauge. It should only be adjusted if the gauge indicates that the regulated pressure is
incorrect.
Logic Manifold:
This black block contains most of the logic components in the system and can be thought of as a
pneumatic printed circuit board. It has internal passageways that interconnect the components with
facilities for connections to the off-manifold items. It incorporates the following major items:
Minimum Pressure Sensor. The pressure inside the PE is monitored continuously by this device.
When the pressure is correct i.e. above the minimum pressure specified for safe operation, the
sensor provides a “Pressurized” output signal that can be seen by the operator, displayed on the Red
/ “Green” visual indicator. The sensor is factory calibrated to operate on a falling pressure at or
above the minimum specified pressure.
Purge Flow Sensor. The purge flow through the Relief Valve (RLV) / Purge Outlet Valve is
monitored by this device. When the purge flow is correct i.e. above the minimum purge flow specified
for correct purging, the sensor provides a “Purging” output signal that can be seen by the operator,
displayed on the Black / "Yellow" visual indicator. The sensor is factory calibrated to operate on a
falling flow rate at or above the minimum specified purge flow rate.
Purge Timer. When the PE pressure is correct and the correct Purge Flow is taking place, a signal
is sent to the Purge Timer to start the timing period. The signal passes through a dedicated in-line
mini-filter to a ruby flow restrictor. The resulting bleed of air is collected by a calibrated reservoir
where the pressure gradually rises. Also connected to the reservoir is the pilot port of the “Timer
Selector Valve”. When the pre-set purge time has elapsed and the reservoir pressure has risen to
the timer valve operating pressure, the timer valve provides a signal to the “Purge Complete” Valve.
“Purge Complete“ Valve. This valve receives the signal from the purge timer when the purge time
has been completed and checks that “Pressurized” signal is also still present. If both conditions are
satisfied, a “Purge Complete” output signal is produced which is sent to perform the following
functions: turn on the electrical supply to the PE, turn off the high purge flow and start the “Leakage
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Compensation” mode. It will also provide a hold-on signal to maintain the system in “Leakage
Compensation” mode with the power switch on even when the Purge Timer has reset ready for the
next purge cycle whenever it is required.
“Or” Gate. This device provides the Purge Complete Valve with its hold-on function referred to
above. When either the “Timed Out” signal or the “Purge Complete” signal is present it allows the
pilot signal to be applied to the “Purge Complete” Valve.
“Alarm Only” Circuit. The system normally will cut off the electrical power to the PE if the enclosure
pressure is too low. In certain circumstances, where local codes of practice allow, the system can be
altered to provide a hold-on circuit that will maintain the electrical power supply to the PE while also
providing a “Pressure Failure Alarm”. The user must respond to the Alarm and either restores the
pressure to the PE or otherwise make the installation safe e.g. shut off the electrical supply. The
decision to use the “Alarm Only” facility, and the length of time during which the enclosure is allowed
to operate un-pressurized, is the responsibility of the user.
Warning:
It is potentially dangerous to energize the Pressurized Motor Enclosure in an un-pressurized
condition, when it is known there are potential explosive hazardous gases in the area.
Motor Interlock Switch:
A Flameproof “Ex d IIC” Power Switch is located on the logic manifold which also contains the
pneumatic actuating piston. The cable from the switch is terminated in an “Ex e II T100ºC (T amb -200C
0
to +55 C) IP66” junction box.
Alarm/Pressurized Switch:
Like the Motor Interlock Switch this “Ex d II” device is operated by the “Pressurized” signal and
provides the facility for a remote electrical system status indicator to show “Pressurized” or “Pressure
Failure Alarm”. The cable from the switch is terminated in an “Ex e II T100ºC (T amb -200C to +550C) IP66”
junction box.
System Purging Switch:
This option is an “Ex d II” device operated by the “Purge Flow” signal and provides the facility for a
remote electrical system status indicator to show “System Purging” (sometimes called Purge in
Progress). The cable from the switch is terminated in an “Ex e II T100ºC (T amb -200C to +550C) IP66”
junction box.
Intermediate Switch:
A Flameproof “Ex d II” Power Switch is located off the logic manifold. The cable from the switch is
terminated in an “Ex e II T100ºC (T amb -200C to +550C) IP66” junction box.
Purge Valve:
This valve controls the admission of purging air to the PE. It is sized to allow sufficient air into the
enclosure during purging based on the specified air supply pressure range, the minimum specified
purging outlet flow rate +10% and the expected leakage rate from the PE during purging. A Purge
Flow Restrictor, (a ball valve) valve is placed upstream of the Purge Valve to restrict the purge flow to
the minimum required. This Purge Flow Restrictor is factory set but can be re-adjusted during
commissioning if required. At the end of the purging cycle, the Purge Valve is closed by the “Purge
Complete” signal and then waits in the closed position until the next purging cycle is needed. It has a
control restrictor in its pilot signal line to slow down the speed at which it resets when the next purge
cycle is started.
CLAPS Sensor:
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This sensor monitors the pressure within the motor and then sends a proportional control signal to
the “CLAPS Leakage Compensation Valve” to either increase or decrease the flow of air into the
motor enclosure to maintain a stable running pressure. The normal motor running pressure must be
determined prior to system start-up so that the CLAPS Sensor may be set to the desired level to
control the CLAPS Valve.
CLAPS Leakage Compensation Valve (CLAPS LCV):
This valve controls the airflow into the PE after the initial purging has been completed. It should be
adjusted initially to around 50% open. After purging has been completed the setting should be
adjusted so that the enclosure pressure is within the desired range and the Relief Valve (RLV) /
Purge Outlet Valve is closed.
Visual Indicators:
Visual indicators are fitted to provide local status information to the operator:
• The “Alarm/Pressurized” indicator has two states:
 Red
= “Pressure Alarm” i.e. “Enclosure Pressure too low”
 Green*
= “Pressurized”
•
The “Purging” indicator has two states:
 Black*
= “Purge flow too low” (or not in the purge mode)
 Yellow
= “Purge Flow” above the minimum”
* Green & Black combination is the indication during normal operation of the PE after the initial
purging process has been completed.
Relief Valve (RLV) / Purge Outlet Valve
The RLV unit allows the purge air to exhaust safely from the enclosure via an in-built Spark Arrestor.
The Spark Arrestor is designed to prevent the emission of arcs, sparks and incandescent particles
produced by normal operation or an electrical fault within the PE.
During purge cycle, a pneumatic cylinder operates a Purge Outlet Valve that lets the air in the
enclosure vent out through the RLV. When the system changes to leakage compensation mode, the
Purge Outlet Valve is closed and the enclosure sealed.
Purge air passes through the RLV and a correctly selected orifice plate will ensure that the Purge
Flow Sensor is activated once the selected purge flow has been attained. This is via a preset
pressure differential across an orifice.
The RLV unit has an in-built relief valve sized to ensure that, if the air supply pressure rises up from
the specified maximum, the internal enclosure pressure will not exceed the PE specified maximum
working pressure.
/PA Terminal Box
Increased Safety
Ex e IIC T5 Gb
Ex tb IIIC T1000C Db IP66
Tamb -20ºC to +55ºC
Ex e IIC T4 Gb
Tamb -20ºC to +60ºC
The Terminal Box is “Increased Safety “ (Ex e) certified and incorporates the terminal connection
points for the alarm & interlock circuits. All contacts provided are Volt free (dry).
Cable entry methods (e.g. conduit or glands) shall conform to IEC / European or other relevant local
codes. The main requirement is that IP54 or IP66 (for dust applications), or better ingress protection
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must be provided by the use of seals or washers. Cable glands must be “Ex” certified if they are nonmetallic.
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6. Installation of the System
This equipment is designed for use under normal industrial conditions of ambient temperature,
humidity and vibration. Please consult Expo before installing this equipment in conditions that may
cause stresses beyond normal industrial conditions.
The MiniPurge system shall be installed in accordance with relevant standards, such as IEC / EN
60079-14, and any local codes of practice that are in force.
Air Supply Quality
The MiniPurge system should be connected to a protective gas supply, which is suitable for purging
and pressurization. The supply pipe connection to the MiniPurge is 1” NPT(F) but the supply pipe
shall be sized for the maximum input purge flow rate for the application and regulated to 6 barg. The
air supply to the filtration system must be clean, non-flammable, from a non-hazardous area and free
from water and oil to BS ISO 8573-1: 2001 Class 2.2.1 or relevant local standards. This is typically
referred to as “Instrument Air Quality”. Although equipment will operate with lower air quality, the
operational life of the system will be adversely affected. The equipment that is being protected may
also suffer from poor air quality.
Solid Particles:
Humidity:
Oil content:
0.5µm < particle size ≤ 1µm, maximum 1000 particles/m3
-40ºC* pressure dewpoint
≤0.01mg/m3 concentration total oil
* For applications where Tamb ≤ 0ºC, the air supply should be Class 2.1.1, with Humidity: -70ºC
pressure dewpoint.
The air supply must be regulated to a pressure less than the maximum stated inlet pressure.
When an inert gas is used to supply the purge system, refer to the earlier warnings regarding the
safety of the gas used. Where risk of asphyxiation exists refer to “Application Suitability” section.
Prior to connecting the air supply to the purge system, flush the supply pipe work with air to remove
any debris that may have been introduced into the pipe work during installation. At least 10 seconds
for every meter length of supply pipe.
Unless a supply shut-off valve has been specially fitted to the MiniPurge system, an external shutoff valve with the same, or larger, thread size as the CU inlet fitting should be fitted by the installer to
prevent any restriction of purge flow.
The purge air from the MiniPurge CU should be piped within the PE to ensure purging of potential
dead air spots.
Warning: The correct logic supply pressure is vital to the reliability and calibration of the
system, therefore it should not be adjusted.
Location
The MiniPurge Control Unit (CU) should be installed either directly on or close to the Motor PE. If
not installed on the PE it should be as close as possible. It should be installed so that the system
indicators and certification labels may be readily observed.
Relief Valve: To achieve efficient purging, the points where air enters and exits the PE should
normally be at opposite ends of the enclosure. The RLV must be mounted vertically and there
should be a minimum clearance of 300mm (12”) around the Spark Arrestor (purge outlet).
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It is important that the interior and exterior of the Spark Arrestor is kept clean and debris is not
allowed to accumulate which might affect the calibration of the device. In particular the exterior of the
Spark Arrestor should not be painted or blocked off in any way.
Serial Numbers All parts of any system carry a common serial number. If installing more than one
system, ensure that this commonality is maintained on each installation.
Piping Unless the MiniPurge is directly connected to the PE, any piping, conduit and fittings used to
connect the CU to the PE should be metallic or appropriate to the environment into which the system
is installed. No valve may be fitted in any tube connecting the CU to the PE. Additional consideration
should always be given to local codes of practice.
Multiple Enclosures This purge system is not suitable for multiple enclosures.
Provision and Installation of Alarm Devices: The system has a Minimum Pressure Sensor set to a
pressure of least 0.5 mbar. When the PE pressure is above this set point the sensor produces a
positive “Pressurized” signal. The relevant indicator on the CU will change from Red to “Green”
When the enclosure pressure falls below the set point of the sensor the “Pressurized” signal is
removed, i.e. absence of the signal indicates a “Low Pressure Alarm” condition. The indicator on the
CU will change from Green to “Red”. There are volt free (dry) contacts available within the Terminal
Box for remote usage. The user must make use of this alarm facility in accordance with the local
Code of Practice for “Action on Pressure or Flow Failure”. Most Codes include the following
recommendations:
•
ATEX Category 2 (Zone 1) Installations: Alarm and Automatic Trip of Power.
•
ATEX Category 3 (Zone 2) Installations Alarm Only on pressure or flow failure with power being
removed manually.
Power Supplies and their Isolation All power entering the PE shall be provided with a means of
isolation. This requirement also applies to any external power sources that are connected to
equipment such as “volt-free” (dry) contacts within the PE. For motor applications it is normally via
the “Motor Interlock Switch.”
The Motor Interlock Switch is a BARTEC 07-2511-1322 Limit Switch, “Ex d IIC Tamb -20ºC +60ºC”
IECEx & ATEX certifications IECEx PTB 07.0045X & PTB 00ATEX1093X.
Rated voltage/current: 250Vac, 4A (AC-15)
This switch is a double-break switch that provides two independent contacts. These two contacts
shall be connected in series and shall be used to isolate the power into the motor. This may be
achieved by means of a contactor or other switching device suitable for the application.
It is responsibility of the user to ensure that switch is operated only within the technical limits that
apply to it, i.e. rated current & voltage shall not be exceeded.
The two contacts of the switch are terminated, and accessible by the user, in a Ex e Terminal box.
The switch must be replaced after any short circuit that occurs in the main circuit. The switch is a
piece of encapsulated equipment and it is therefore not possible to check the state of the switch
contacts. It is not permissible to technically modify the switch.
Before commissioning check that the Ex e terminal box is clean, the connections have been made
properly, the cables have been laid correctly and all screws in the terminals are tightened securely.
The safety related with the use of this switch is responsibility of the user. All electrical installations
must conform to the local codes of practice.
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Exception: Power to other apparatus that is already suitable for the hazardous area need not to be
isolated by the MiniPurge system.
In all cases the application and the isolation of the power must be controlled by the MiniPurge
system using the “Motor Interlock” signal.
The electrical installation must conform to the local codes of practice.
No switches are permitted between the Power Switch and the MiniPurge system other than an
authorized “Manual Override” circuit.
7. Commissioning
Initial Commissioning.
• The “CLAPS Leakage Compensation Valve” can be set finally only when the enclosure has been
installed in its permanent operating location.
• Check that the system has been installed in accordance with Expo Instructions.
• Disconnect the supply pipe from the inlet to the MiniPurge system and blow clean air through it
for at least 10 seconds per meter of length to remove any debris, oil and condensation.
Commissioning.
Proceed as follows:
• Check all connections and RLV is fitted correctly with no obstructions to the purge exhaust.
• Close the Purge Flow Restrictor valve.
• Open external supply shutoff valve fully, where fitted.
• Check that the internal logic pressure gauge reads 2.1 barg / 31 psig / 210 kPag.
• Check that the pressure gauge on main air supply reads 5 barg / 75 psig / 500 kPa. Purging flow
will start.
• Check the Pressure Relief Valve is correctly set by disconnection the Minimum Pressure sensing
“Green” pipe at the bulkhead fitting on the input to the MiniPurge, this will disable all of the
pressure sensors.
• Connect a manometer to the bulkhead fitting, with a 4mm nylon tube, from where the Minimum
Pressure sensing “Green” pipe was removed.
• Close the Purge Flow Restrictor valve and turn on the compressed air to the MiniPurge. Then,
very slowly, open the Purge Flow restrictor until the pressure Relief Valve opens and check the
opening pressure is within calibration. This test can be completed several times to ensure
compliance and repeatability. Go to Maintenance of the System if the Relief Valve needs to be
recalibrated.
• Close the Purge Flow Restrictor and shut-off the external compressed air supply. Remove the
manometer and replace the Minimum Pressure sensing pipe in the bulkhead fitting.
• The setting of the Purge Flow Rate. Turning on the compressed air to the MiniPurge and
gradually open the Purge Flow Restrictor valve until the “Black” / Yellow indicator changes to
Black / “Yellow”, typically motor internal pressure should be approximately 13 – 16 mbarg. The
Yellow indication confirms correct Purge Flow Rate.
• At this time the "Pressurized" indicator should be “Green” and the "Purging" indicator should be
“Yellow”.
•
WARNING: When opening the Purge Flow Restrictor valve ensure the overpressure within the
motor does not exceed the pressure Relief Valve setting.
The purge timer will start as soon as the "Purging" indicator turns “Yellow”. Check that the time
delay between the indicator turning “Yellow” (Purging) and returning to ‘Black’ is not less than the
ML434 v12j
18-June-2015
Page 12 of 17
•
•
•
minimum time required to purge the PE. Times in excess of the minimum are permitted and a
tolerance of +25% is normally acceptable. The purge time can only be extended, beyond the
standard 45 minutes, by adding an extra reservoir. See option list of extended times available.
After the purge time has been completed, the Purging Valve will close and the air flow into the
enclosure will be controlled by the CLAPS LCV. The initial setting of 50% open may be too high
or too low. If the setting is too high this will be demonstrated by continual rising & falling of the
motor enclosure pressure, as the CLAPS LCV automatically shuts off and then reinstates the
flow. The CLAPS LCV should be adjusted to reduce the flow into the motor enclosure by turning
the adjuster screw anti-clockwise.
If the initial setting is too low the CLAPS LCV & CLAPS Sensor will already be working to provide
excessive flow into the motor thus leaving no scope for additional compensation during normal
motor running. To increase the flow into the motor enclosure, adjust the CLAPS LCV, by turning
the adjuster screw clockwise.
The setting of the CLAPS Sensor is factory calibrated to the normal working pressure expected in
the motor, typically 10 mbarg. The pressure in the Motor should be stabilized as close as possible
to this figure.
Additional Checks
• After proving the system is working correctly it may be a requirement to check the calibration of
the Pressure Sensors within the MiniPurge Control Unit. To complete these tests use a
manometer and connect to the MiniPurge Control Unit Test Point (on the top of minimum
pressure sensor - remove the red plug and use 4mm OD nylon tube) during commissioning.
• The calibration of the Pressure Sensors is set on a falling pressure.
• Close the Purge Flow Restrictor valve and then gradually slowly open until above the minimum
Pressure Sensor setting, Alarm indicator turns from Red to “Green”. Gradually close the Purge
Flow Restrictor valve until the indicator turns back to Red and take a note of the reading. Check
this reading against the “Test, Inspection and Setting Sheet”. It should always be at or above this
setting.
• The same tests can be preformed for the all the other Pressure Sensor incorporated within the
MiniPurge Control Unit.
• Once all tests are completed reset the Purge Flow Restrictor valve and retest the MiniPurge
System.
• Go to Maintenance of the System if the Pressure Sensor needs to be recalibrated.
Normal Operation
Turn the air supply valve On or Off to start or stop the system. After this, the Pressurizing and
Purging sequence is entirely automatic.
ML434 v12j
18-June-2015
Page 13 of 17
8. Maintenance of the System
The maintenance recommended for the system consists of the following, supplemented by any
additional requirements imposed by the local Code of Practice.
Expo recommends that the commissioning tests be repeated at every six to 24 months, dependent
on the environment. In addition the following checks are also recommended at that time:
•
•
Check the RLV and any other Spark Arrestors. Remove any debris or corrosion, or replace with a
spare.
Check the condition of the air supply filter element. Clean or replace it as necessary.
At least every two years, the following additional checks are recommended:
• Apparatus is suitable for the Hazardous Location
• There are no unauthorized modifications
• The source of air is uncontaminated
• The interlocks and alarms function correctly
• Approval labels are legible and undamaged
• Adequate spares are carried
• The action on pressure failure is correct
Recalibration of the Pressure Relief Valve (when necessary)
Before making any adjustment, make sure the pressure Relief Valve seat is free of contamination,
particles. To adjust the lift off pressure of the overpressure Relief Valve you will require an 8mm
spanner and a 2.5mm Allen Key. While holding the central Allen Screw in position loosen the
retaining nut. Adjust the Allen key clockwise to increase the lift off pressure, adjust Anti-clockwise to
reduce the lift off pressure. "The adjustment is very sensitive and it is recommended that one half
turn between tests should be adequate until you are familiar with the device". Retighten the locking
nut while holding the adjustment screw in position before each test.
The RLV is supplied with selectable orifice plates to set the flow rate. The orifice plate is fitted in its
place using two small M3 screws. It can be easily changed by removing the large cover plate which
includes the outlet valve assembly and screws.
Removing the small cover plate to
set the RLV opening pressure
Orifice Plate
Allen Screw & Lock NUT
ML434 v12j
18-June-2015
Page 14 of 17
Recalibration of the Pressure Sensors (when necessary)
The brass nozzle is sealed into position using Loctite thread
sealant. This may require heating slightly to soften prior to
making any adjustment to avoid damaging the soft brass
nozzle. The adjustment is very sensitive so only turn the
nozzle 1 or 2 mm until you have an idea of cause and affect
when calibrating. Clockwise reduces the pressure setting.
Remove Sensor by
unscrewing anti-clockwise.
Brass Nozzle
9. Fault Finding
If the system does not behave in the manner described above there is a fault. Some of the more
likely faults are dealt with below. If a cure cannot be effected by following the procedure shown
below, please call Expo (24 hour answering) or your supplier for further assistance.
The system has been designed for ease of fault finding and many of the components fitted are plugin or chassis mounted. Check components by substitution only after establishing that such action is
necessary. If the system is less than 12 months old, parts under warranty should be returned to
Expo for investigation, with a full report of the fault and the system Serial Number.
As with any pneumatic system the greatest enemies are water, oil and dirt in the air supply. For this
reason the air system must always incorporate a dust and water filter to provide air to instrument
quality. This will protect not only the purge system but also the equipment being purged. The
filtration must be provided by others. However, dirt can enter from other sources and it is vital
therefore that the procedures described in the "Installation" section are carried out before using the
system for the first time, or following any disconnection of the pipe-work. Failure to perform this work
may cause damage that will not be covered under warranty.
Before making the following checks verify that both the main air supply pressure to the MiniPurge
system & the regulated pressure to the logic are as specified on the system specification sheet.
Most reported faults are due to insufficient air supply being maintained throughout the duration of a
purge cycle.
System Purges Correctly but the Alarm Comes ON at the End of Purge Time and the Purging
Cycle is Repeated.
Cause 1:
The CLAPS Leakage Compensation Valve setting is too low and the PE is tripping out after purging
due to low pressure.
Try increasing the setting of the CLAPS Leakage Compensation Valve to raise the pressure in the
PE at the end of purging.
Cause 2: Enclosure fault?
• Is the ACTUAL PE pressure below the setting of the Minimum Pressure Sensor? Check it with a
manometer.
• Is there any debris on the face of the RLV disk, perhaps held there because of the magnet?
• Has the PE door / covers been closed and all conduit / cable glands sealed?
• Is the PE leaking too much?
• Is the pressure sensing tube damaged and leaking?
ML434 v12j
18-June-2015
Page 15 of 17
Cause 3: System fault?
If checks above reveal that the PE is correct, the fault probably lies in the CU. The basic operation
of the Minimum Pressure Sensor can be checked by unscrewing the 60mm diameter diaphragm
housing and sealing the 12mm threaded hole in the top of the valve module. This can be
accomplished by using a rubber block or if necessary a clean finger. The valve should operate and
the indicator turns Green. If indicator turns Green it is likely that the pressure sensor diaphragm
needs re-calibrating or replacing.
Relief Valve Opens (Continuously or Intermittently)
Cause 1: The PE pressure is too high.
The CLAPS Leakage Compensation Valve is too far open. Adjust the CLAPS LCV.
Cause 2: Debris on the RLV disk allowing air to leak from the valve. Remove the RLV cover and
clean the valve disk.
"Purging" Indicator Will Not Turn Yellow During Purging
Cause 1: Insufficient Purging Flow due to inadequate air supply pressure. Check the air supply
pressure at the inlet to the CU when purging is taking place. Excessive pressure drop in the supply
pipe is a very common cause of this problem. The pipe bore must be at least the same size of the
CU inlet fitting.
Cause 2: Excessive PE leakage. Check around the PE when purging is taking place. Any significant
leakage must be cured. Has a Leakage Test been done? The total leakage at the Purge Outlet Valve
should not exceed 10% of the Purge Flow Sensor setting. Check for leakage down the cables or
conduit.
Cause 3: The tubing from the RLV Flow Sensing point to the Purge Flow Sensor is not air-tight e.g.
fitting nuts not tightened or tube damaged. Check and repair as necessary.
Cause 4: The Purge Flow Sensor is not operating correctly or out of calibration. The basic operation
of the Purge Flow Sensor can be checked by unscrewing the 60mm diameter diaphragm housing
and sealing the 12mm threaded hole in the top of the valve module. This can be accomplished by
using a rubber block or if necessary a clean finger. The valve should operate and the indicator turns
“Yellow”. If this is correct the sensor diaphragm needs re-calibrating or replacing.
System Fails to Operate when the Motor Interlock Switch Closes after the Purge Time has
Elapsed?
Cause 1: Is power available? Is the power isolator closed? Are the fuses or circuit breaker OK?
Cause 2: System fault? Timer not timed out?
• Has the "Purging" indicator been “Yellow” for the whole of the purge time?
• Is the logic pressure gauge setting correct?
• Check the small indicator (if fitted) on the timer valve. When the timer has timed out it should
return out when depressed.
• The timer setting may be reduced for test purposes by pinching the pipe connected to the
reservoir. Use a small pipe clamp or smooth-jaw pliers. Do not puncture the pipe! The new time
will probably be less than 1 minute. Check the operation on the new purge time. If it works OK.
Remove the clamp and retest. If the system ceases to time out, there is an air leak in the
reservoir circuit. Use soapy water to detect the leak and then rectify it. (Call Expo Ltd. if in doubt).
Finally recheck the purge timer at its full setting.
ML434 v12j
18-June-2015
Page 16 of 17
10. Recommended Spares List
S0015/026
S0191/025
S0191/026
HS1-1XX0-031
S0030/016
S0030/588
Filter kit for S0015/275 filter/regulator
E x d IIC T6 limit switch SPNO
E x d IIC T6 limit switch DPNO
Purge Flow Sensor, factory set to 6.4 marg
Minimum Pressure Sensor, must be factory set to correct value that is stated
on Customer System Test & Inspection sheet.
CLAPS Sensor, must be factory set to correct value that is stated on Customer
System Test & Inspection sheet.
NOTE: The system’s Pneumatic Timer may be replaced with the new EXPO Electronic Timer.
Please contact Expo Technologies’ Sales Team for further details.
11. Drawings and Diagrams
The following drawings are attached:
Title
D758 Control Unit – Pneumatic Timer
Typical D758 Hook Up
D758-3 P and I Diagram
Circuit Diagram
Terminal Box Layout
Manual Override Switch-HU
RLV - Size 5 MotorPurge RLV
Drawing Number
D758MOTORSYS-P
D758-HU
D758-PI
AGM-PA00-029
AGE-WC00-154
AGE-WC00-117
XBR-RTD0-009
Sheet(s)
2 of 2
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
12. Certificates
See attached Certificates:
Purge system IECEx Certificate
Purge system ATEX Certificate
Purge System TUV Certificate
Ex e IECEx Certificate
Ex e ATEX Certificate
Ex e TUV Certificate
Ex d electrical switches IECEx Certificate
Ex d electrical switches
Bartec Doc
IECEx SIR07.0027X
SIRA 01ATEX1295X
TÜV 12.1462X
IECEx ITS10.0003X
ITS 10 ATEX 37092X
TÜV 12.1463
IECEx PTB07.0045X
PTB 00 ATEX 1093 X
01-2511-7C0001
ML434 v12j
18-June-2015
Page 17 of 17
425
16.73
158
6.23
STAINLESS STEEL 316
STAINLESS STEEL 304/316
Ex e JUNCTION BOX
BULK HEAD FITTINGS
MOD NUMBER
DRAWN
REV.
01
10/06/2015
APPROVED DATE
MLC
APPROVED
CHECKED
AS
APPROVED
MLC
Controlled
DRAWING STATUS:
DRAWN
JG
02/04/2015
DRAWN DATE:
NOTES:
1.
MINI PURGE MUST BE MOUNTED IN THE ATTITUDE SHOWN
2.
WEIGHT APPROX 27 Kg
3.
MODEL NUMBER NO. 5XLC/SS/ET/OV/PA/PC
4.
EXPO PART CODE: D758MOTORSYS-P
STAINLESS STEEL 316
APERTURE
4 X HOLES 9.5 FOR
WALL MOUNTING
57
2.24
58
2.3
OPEN PURGE OUTLET SIGNAL
TO RELIEF VALVE 1/8" NPT
D.P. LO FROM RELIEF VALVE 1/8"NPT
PURGE AIR OUTLET
1"NPT FEMALE
SYSTEM HOUSING
MATERIALS
18
0.71
73
2.9
177
6.97
420.0
16.54
480.0
18.90
N/A
MATERIALS - SEE NOTES
120
4.72
80
3.15
50
1.97
38
1.5
EARTH STUD - M6 X 20
ON Ex e JUNCTION BOX
FILTER DRAIN
1/8" NPT FEMALE
SYSTEM BREATHER: DO NOT OBSTRUCT
SURREY TW16 5DB UNITED KINGDOM
CUSTOMER:
D758 CONTROL UNIT - PNEUMATIC TIMER
JOB No:
TITLE
E-TIMER DATA LABEL
158
6.23
REV:
28.0
1.10
73
2.9
01
SHEET No.
1
OF
2
D758MOTORSYS-P
SCALE
1:10
DRAWING No.
PURGE AIR SUPPLY
1" NPT FEMALE
MOTOR SYSTEM DATA LABEL
MOTOR ENCLOSURE PRESSURE
CONNECTION 1/8 NPT FEMALE
Ex e JUNCTION BOX WITH
FRONT ACCESS COVER AND
REMOVABLE LOWER GLAND
PLATE
MINI PURGE INTERFACE UNIT
CERTIFICATION LABEL
INDICATOR:
MOTOR LOW PRESSURE
ALARM/ PRESSURIZED
(RED / GREEN)
INDICATOR
SYSTEM PURGING
(BLACK / YELLOW)
Expo Technologies Limited
EARTH STUD - M6 X 20
180
7.09
50
1.97
80
3.15
110
4.33
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential and are returnable upon request. They are not
to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither are they to be used in any way against our interests.
274
10.79
5 UNLESS STATED OTHERWISE
D.P HI FROM RELIEF VALVE 1/8" NPT
TOLERANCE
485
19.09
100.0
3.94
DO NOT SCALE
455
17.91
75
2.95
192.0
7.56
INCLUDING GASKETS
AND GLAND PLATE
425
16.73
70
2.76
DIMENSIONS IN mm
50
1.97
3rd ANGLE PROJECTION
100
3.94
265
10.4
150 ±2
5.91 ±0.08
INCLUDING GASKET
28
30
29
SCRAP VIEW OF
DOOR FROM INSIDE
CHECKED
NW
APPROVED
MLC
Controlled
DRAWN
JG
02/04/2015
10
11
TOLERANCE
DRAWING STATUS:
4
5
6
8
7
9
DO NOT SCALE
DRAWN DATE:
31
DIMENSIONS IN mm
SCRAP VIEW WITH DOOR FITTED
TO SHOW INDICATORS
3rd ANGLE PROJECTION
13
32
14
33
15
34
16
18
17
N/A
MATERIALS - SEE NOTES
JOB No:
TITLE
3
2
1
CUSTOMER:
01
SHEET No.
2
OF
2
D758MOTORSYS-P
SCALE
1:10
DRAWING No.
REV:
TERMINALS Ex COMPLIANT
33
/PA TERMINAL BOX
TERMINAL RAIL
32
34
MINI PURGE CERTIFICATION LABEL
31
ELECTRONIC PURGE TIMER
26
MINI PURGE DOUBLE INDICATOR LABEL
INTERMEDIATE SWITCH, 250V 4A, SPNO Ex d II
25
30
INTERMEDIATE SWITCH ACTUATOR
24
INDICATOR - SYSTEM PURGING
REGULATOR - LOGIC AIR SUPPLY
23
29
GAUGE - LOGIC AIR SUPPLY
22
INDICATOR ALARM / PRESSURIZED
GAUGE - MAIN AIR SUPPLY
21
28
AIR SUPPLY FILTER / REGULATOR
20
I.S BATTERY PACK
CLAPS SENSOR
19
27
FLOW RESTRICTOR (CLAPS SENSOR)
PURGE OUTLET OPEN SIGNAL VALVE (2)
17
18
MINIMUM PRESSURE SENSOR
INTERMEDIATE PRESSURE SENSOR
16
TIMER VALVE
14
15
PURGE COMPLETE VALVE
13
LOGIC MANIFOLD
11
PURGE FLOW SENSOR
POWER INTERLOCK SWITCH, 250V 4A, DPNO Ex d II
10
12
ALARM / PRESSURIZED SWITCH, 250V 4A, SPNO Ex d II
9
SURREY TW16 5DB UNITED KINGDOM
25
24
20
23
22
21
PURGE VALVE
8
CLAPS REGULATOR
5
TIME SELECTOR VALVES
TIMER RESERVOIRS
4
PURGE FLOW RESTRICTOR
SYSTEM PURGING SWITCH, 250V 4A, SPNO Ex d II (OPTIONAL)
3
7
PURGE COMPLETE BOOST VALVE
2
6
PURGE OULET OPEN SIGNAL VALVE (1)
1
D758 CONTROL UNIT - PNEUMATIC TIMER
Expo Technologies Limited
19
PART DESCRIPTION
ITEM NO.
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential and are returnable upon request. They are not
to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither are they to be used in any way against our interests.
FRONT VIEW WITH DOORS REMOVED TO
SHOW INTERNAL LAYOUTS OF CONTROL UNIT
AND Ex e JUNCTION BOX
12
5 UNLESS STATED OTHERWISE
1
JPdB
DRAWN
DRAWING STATUS:
APPROVED:
DATE:
MOD. No:
ISSUE:
2
4667
17/04/09
JPdB
UNSPECIFIED
TOLERANCES
FINISH
MATERIAL
PURGE AIR DISTRIBUTION
AS REQUIRED
MOTOR
MINIPURGE
JOB No:
TITLE
CUSTOMER:
SURREY KT7 0RH
UNITED KINGDOM
SHEET No.
1
OF
See drawing
AGM-PA00-021
DRAWING No.
SCALE
SYSTEM PURGING contacts
ALARM / PRESSURIZED contacts
INTERMEDIATE PRESSURE contacts
MOTOR INTERLOCK contacts
Measuring point for minimum pressure
Air inlet
Measuring point for flow of purge air
Ensure outlet is not obstructed
Expo Technologies Limited
LC
BOOST
Air outlet
RELIEF VALVE UNIT
The contents of this drawing / document are Copyright  Expo Technologies Limited. They are to be treated as confidential and are returnable
upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither
are they to be used in any way against our interests.
PURGE OUTLET VALVE open signal
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
MOTOR COOLER
DO NOT SCALE
DIMENSIONS IN mm
LC Boost system is optional.
NOTE
3rd ANGLE
PROJECTION
1
1
JPdB
DRAWN
DRAWING STATUS:
APPROVED:
DATE:
MOD. No:
ISSUE:
7
MINIPURGE
CONTROL LOGIC
XI
8
4763
11/8/09
JPdB
XC
MANUALLY SET
PURGE BOOST FLOW
CONTROL VALVE
H
FINISH
MATERIAL
PI
PURGE BOOST UNIT (OPTIONAL)
AUTOMATIC
LEAKAGE
COMPENSATION
VALVE
H
MANUALLY SET
PURGE FLOW
CONTROL VALVE
H
PI
PURGING/
PURGE
COMPLETE
LOW
PRESSURE PAL
ALARM
MINIPURGE SYSTEM ENCLOSURE
4669
4686
21/04/09 01/07/09
JPdB
JPdB
6
UNSPECIFIED
TOLERANCES
1/2" NPT
CONNECT TO EITHER
A OR B
A
B
* 1" [25mm] I.D. MINIMUM
*
1/4" [6mm] I.D.
JOB No:
TITLE
1/8"
NPT
1/8"
NPT
RELIEF
VALVE
ASSEMBLY
1/8"
NPT
CUSTOMER:
SURREY KT7 0RH
UNITED KINGDOM
OPTIONAL
SHEET No.
DRAWING No.
SCALE
ELECTRICAL SIGNAL VIA EEx e JUNCTION BOX
RECOMMENDED MINIMUM SIZE FOR PURGE AIR DISTRIBUTION
PIPEWORK
MOTOR ENCLOSURE
Expo Technologies Limited
1" NPT
OPEN PURGE OUTLET VALVE CONTROL SIGNAL
1/8" NPT
1/4" [6mm] I.D.
1/8" NPT TEST POINT
NORMALLY PLUGGED
D.P. LO FROM RELIEF VALVE
D.P.HI FROM RELIEF VALVE
1/8" NPT
1/8" NPT
MOTOR INTERLOCK
INTERMEDIATE PRESSURE
ALARM / PRESSURIZED
1/4" [6mm] I.D.
1
OF
The contents of this drawing / document are Copyright  Expo Technologies Limited. They are to be treated as confidential and are returnable
upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither
are they to be used in any way against our interests.
SYSTEM PURGING (OPTIONAL)
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
1/2" NPT
1" NPT
DO NOT SCALE
DIMENSIONS IN mm
SUPPLY
5-16 barg (73 - 230 psi )
INSTRUMENT
AIR/INERT GAS
1" [25mm] I.D. MINIMUM
3rd ANGLE
PROJECTION
1
DRAWING STATUS:
APPROVED:
DATE:
MOD. No:
ISSUE:
104
BROWN
103
GREY
102
BLACK
101
GREY
102
BLACK
101
BROWN
103
BLACK
104
105
GREY
INTERMEDIATE
PRESSURE
CONTACTS
106
MOTOR
INTERLOCK
CONTACTS
109
FINISH
JOB No:
TITLE
CUSTOMER:
SURREY KT7 0RH
UNITED KINGDOM
MAXIMUM CURRENT RATING: 10A / TERMINAL AT 55°C
5
Expo Technologies Limited
MAXIMUM VOLTAGE: 550V
4
MATERIAL
DOUBLE LINES SHOW THE POSITION OF TERMINAL END PLATES
113
3
112
ALL TERMINALS MUST BE Ex e CERTIFIED KEMA 98 ATEX1683U, IECEx ULD 05.0008U.
111
2
110
EXTRA TERMINALS MAY BE FITTED. THE NUMBER OF TERMINALS MUST NOT EXCEED THE
MAXIMUM SPECIFIED IN THE TERMINAL BOX CERTIFICATE - CONSULT EXPO TECHNOLOGIES.
NOTES
108
TERMINAL LAYOUT FOR
SYSTEM FITTED WITH "SYSTEM
PURGING" CONTACTS
TERMINAL LAYOUT
SHEET No.
DRAWING No.
SCALE
OF
The contents of this drawing / document are Copyright  Expo Technologies Limited. They are to be treated as confidential and are returnable
upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither
are they to be used in any way against our interests.
1
107
GREY
SYSTEM
PURGING
CONTACTS
105
BLACK
BLUE
ALARM/
PRESSURISED
CONTACTS
106
GREY
BROWN
SEE CIRCUIT DIAGRAM
110
109
108
107
BROWN
MOTOR
INTERLOCK
CONTACTS
GREY
INTERMEDIATE
PRESSURE
CONTACTS
BLUE
BLACK
BLACK
BROWN
BROWN
ALARM/
PRESSURISED
CONTACTS
SEE CIRCUIT DIAGRAM
DO NOT SCALE
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
UNSPECIFIED
TOLERANCES
BLACK
DIMENSIONS IN mm
GREY
3rd ANGLE
PROJECTION
BROWN
1
CERT RELATED
PO
6
7
FROM MINIPURGE
DO NOT SCALE
DIMENSIONS IN mm
DRAWN
DRAWING STATUS:
APPROVED:
DATE:
MOD. No:
ISSUE:
3rd ANGLE
PROJECTION
BLACK
BROWN
NEUTRAL
LIVE
14
13
23
24
10 (or 110)*
9 (or 109)*
8 (or 108)*
7 (or 107)*
8
FINISH
MATERIAL
JOB No:
TITLE
CUSTOMER:
Expo Technologies Limited
* TERMINAL NUMBER ACCORDING TO MOTOR SYSTEM
CABLE GLANDS ARE NOT SUPPLIED.
GLAND PLATE IN PURGE SYSTEM IS UNDRILLED.
MANUAL OVERRIDE SWITCH SUPPLIED LOOSE.
Ex d IIC T6
BLUE
MANUAL OVERRIDE
GREY
LIVE
Ex e TERMINAL BOX
SURREY KT7 0RH
UNITED KINGDOM
SHEET No.
DRAWING No.
SCALE
1
OF
The contents of this drawing / document are Copyright  Expo Technologies Limited. They are to be treated as confidential and are returnable
upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither
are they to be used in any way against our interests.
NEUTRAL
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
UNSPECIFIED
TOLERANCES
1
120 CRS
280
MOD NUMBER
DRAWN
4666
4793
REV.
01
02
03
16/10/2009
17/04/2009
20/02/2009
APPROVED DATE
PURGE AIR OUTLET
SPARK ARRESTOR
MUST NOT BE OBSTRUCTED
256 CRS
136
JPdB
JPdB
JPdB
DR'WN
NAH
CHK'D
NRB
APP'D
JPdB
production
FINISH
88
PURGE AIR OUTLET
43
DIFFERENTIAL FLOW SIGNAL
LOW PRESSURE
OPEN PURGE OUTLET
VALVE SIGNAL
DIFFERENTIAL FLOW SIGNAL
HIGH PRESSURE
MOTOR ENCLOSURE
TEST POINT (PLUGGED)
NROB
STAINLESS STEEL 316L
1.6mm THK
MOUNTING DETAILS
JOB No:
TITLE
CUSTOMER:
SIZE 5 MOTORPURGE RLV
SURREY KT7 0RH
Expo Technologies Limited UNITED KINGDOM
5. ON INSTALLATION ENSURE THAT FIXING
BOLTS ARE EVENLY TIGHTENED TO A
TORQUE OF 5 Nm (44 lbf/in)
4. PART CODE: ARV-1048-107
3. WEIGHT IS APPROXIMATELY 7 kg
2. THE RELIEF VALVE MUST BE MOUNTED
IN THE ORIENTATION SHOWN.
10.8
274 =
=
9.4
= 240 =
12.0
306 =
=
1:5
03
REV:
SHEET No.
1
OF
1
XBR-RTD0-009
DRAWING No.
SCALE
10 FIXING POINTS
TO SUIT M8
LARGE COVER PLATE FOR
CHANGING THE ORIFICE PLATE
INSPECTION COVER
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential
and are returnable upon request. They are not to be copied or communicated in part or in whole without written consent
from Expo Technologies Limited, neither are they to be used in any way against our interests.
1. RELIEF VALVE SUPPLIED WITH USER
SELECTABLE ORIFICE PLATES TO SET
THE FLOW RATE.
NOTES
11/02/2009 MATERIAL
DRAWING STATUS:
APPROVED DRAWN DATE:
274
202
330
306 CRS
240 CRS
EXCHANGEABLE
ORIFICE PLATE
10-OFF
FIXING POINTS
TO SUIT M8
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
UNSPECIFIED
TOLERANCES
30
MOTOR ENCLOSURE OVER PRESSURE
RELIEF VALVE ASSEMBLY
95
60
DO NOT SCALE
10.1
256 =
=
DIMENSIONS IN mm
8.9
= 225 =
3rd ANGLE
PROJECTION
4.7
= 120 =
Address:
This equipment and any acceptable variation thereto is specified in the schedule to this certificate and
the documents therein referred to.
Sira Certification Service, notified body number 0518 in accordance with Article 9 of Directive 94/9/EC of 23
March 1994, certifies that this equipment has been found to comply with the Essential Health and Safety
Requirements relating to the design and construction of equipment intended for use in potentially explosive
atmospheres given in Annex II to the Directive.
7
8
29097
Form 9400 Issue 1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Project Number
II 2(2) GD
Ex [px] ia IIC T6 Gb
Ex [p] ia IIIC T95°C Db
(Ta –20oC to +55oC)
II 2(3) GD
Ex [pz Gc ] IIC T6 Gb
Ex [p Dc] IIIC T85°C Db
(Ta –20°C to +55°C)
Standard /ET versions
II 2(2) GD
Ex [px] IIC T6 Gb
Ex [py] IIC T6 Gb
Ex [p] IIIC T85°C Db
(Ta –20°C to +55°C)
Page 1 of 7
Sira 01ATEX1295X
Issue 8
Metal foam
Tortuous path with at least 4 x 90°or 2 x 180° bends
Multi-layer stainless steel mesh
Knitted mesh
Threaded Orifices e.g. ¼″ NPT or 2″ BSP with a built in spark arrester. These are selected to maintain a
desired back pressure within the Ex p protected apparatus when used with the Continuous Flow options.
The designation of each outlet orifice indicates the nominal inlet diameter. The designations are as
follows: SA3, SA6, SA9, SA12, SA19, SA25, SA32, SA38 and SA50.
Plain holes in the Relief Valve disk, sized according to the flow rate required.
Replaceable orifice type SAU**.
•
•
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Tel:
Fax:
Email:
Web:
Form 9400 Issue1
Page 2 of 7
Rake Lane, Eccleston, Chester, CH4 9JN, England
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Tel:
Fax:
Email:
Web:
Sira Certification Service
Pneumatically Operated Outlet Valve - The pneumatically operated outlet valve is used to
positively open or close the outlet of the purged enclosure by means of a spring return pneumatic
cylinder. Systems fitted with the Pneumatically Operated Outlet Valve will carry the option OV.
High Pressure Sensor for LC Systems (HP code) - If the pressure in the pressurized enclosure
rises above the setting of the High Pressure sensor, the purge gas flow is isolated from the pressurised
enclosure. The valve isolates both the leakage compensation and the purge streams. On detecting the
overpressure, an optional facility is available for the generation of an alarm or indicator. On systems
with a High Pressure sensor, the relief valve may be omitted.
High Pressure Sensor for CF Systems (HP code) - If the pressure in the pressurized enclosure
rises above the setting of the High Pressure sensor, the controller resets cutting the power to the
enclosure. On detecting the overpressure an optional facility is available for the generation of an alarm
or indicator. On systems with a High Pressure sensor, the relief valve may be omitted.
•
•
•
Outlet Orifice - Three types of orifice are used:
•
•
The outlet of each relief valve is fitted with a spark arrestor, of which there are four optional types:
RLV3, RLV6, RLV9, RLV12, RLV19, RLV25, RLV26, RLV52, RLV36, RLV75, RLV104, RLV125, RLV150 and
RLV200.
Relief Valve - The MiniPurge controller is supplied with an optional overpressure relief valve, which is to be
fitted to the Ex p protected apparatus to prevent an internal overpressure above the maximum overpressure
rating of the apparatus. There are 14 models of relief valve; the designation of each relief valve refers to its
nominal bore in mm, as follows:
The MiniPurge option pD is for use in combustible dust
The MiniPurge control unit may be supplied within a heated enclosure to permit the use of the system within
an ambient temperature down to –50oC.
LC-Leakage compensation only after initial high purge
CF-Continuous flow (same flow rate during and after purging)
CF2-Two flow CF system with initial high purge rate only at one orifice
CFHP-Continuous (lower) flow after initial high purge
The Purge Controllers are pneumatically operated devices, which are intended to provide a given flow rate of
purging gas for a predetermined time to unspecified Ex p protected electrical equipment. The MiniPurge
Control Units provide one of the following four methods of purge operation.
DESCRIPTION OF EQUIPMENT
This certificate and its schedules may only be
reproduced in its entirety and without change.
13
EC TYPE-EXAMINATION CERTIFICATE
SCHEDULE
CERTIFICATION
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
C Ellaby
Deputy Certification Manager
Ex [px] dem ia IIC T3 or T4 Gb
Ex [p] ia IIIC T200°C or T135°C Db
(Ta –50°C to +55°C)
Low temperature /ET versions
II 2(2) GD
II 2(2) GD
Ex [px] dem IIC T3 or T4 Gb
Ex [p] IIIC T200°C or T135°C Db
(Ta –50°C to +55°C)
Low temperature versions
The marking of the equipment shall include the following:
12
Standard versions
This EC type-examination certificate relates only to the design and construction of the specified equipment. If
applicable, further requirements of this Directive apply to the manufacture and supply of this equipment.
EN 61241-4: 2006
11
EN 60079-2:2007
If the sign ‘X’ is placed after the certificate number, it indicates that the equipment is subject to special
conditions for safe use specified in the schedule to this certificate.
IEC 60079-0:2011
Compliance with the Essential Health and Safety Requirements, with the exception of those listed in the
schedule to this certificate, has been assured by compliance with the following documents:
The examination and test results are recorded in the confidential reports listed in Section 14.2.
Unit 2, The Summit, Hanworth Road, Sunbury on Thames, Surrey TW16 5DB UK
EXPO Technologies Limited
10
9
Applicant:
8
6
Issue:
5
Sira 01ATEX1295X
Purge Controllers: Sub-MiniPurge, MiniPurge, Super-MiniPurge,
Super-MiniPurge 1800/3500/7000/7000X
Certificate Number:
Equipment:
3
Equipment intended for use in Potentially Explosive Atmospheres Directive 94/9/EC
2
4
EC TYPE-EXAMINATION CERTIFICATE
1
CERTIFICATION
Form 9400 Issue1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Page 3 of 7
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Model Number Designation for ATEX approved MiniPurge systems
a
Size or Capacity
Model Number:
1
Sub-MiniPurge
2
MiniPurge
1 X LC cs DS SS AA MO FM OA TW
3
Super-MiniPurge
Key:
4
Super-MiniPurge 1800
a b cc mm Example option codes
5
Super-MiniPurge 3500
6
Super-MiniPurge 7000
7
Super-MiniPurge xxxx
b
Pressurization Type
X
X Pressurization
Y
Y Pressurization
Z
Z Pressurization
cc
Action after initial purging
LC
Leakage Compensation only after initial High Purge
CF
Continuous Flow (same flow rate during and after purging)
CF2
Two Flow CF system with initial High Purge rate but only one orifice
CFHP
Continuous (lower) Flow after initial High Purge
DP
Dust Protection (pressurization only)
mm
Material of the Control Unit Enclosure
al
Aluminium alloy
cs
Mild steel, painted
ss
Stainless steel
bp
Back Plate only
co
Chassis only
pm
Panel mounting
nm
Non-Metallic
Option codes (Added only if used)
AA
Active Alarm output fitted.
AC
Alarm cancellation circuit.
AO
"Alarm Only" Action on Pressure or Flow Failure.
AS
Alarm "Action on Pressure or Flow failure", Selector valve.
CS
Containment System Monitor.
DS
Door switch Power Interlock fitted.
DT
Delayed Trip after Pressure or Flow failure.
DXXX
Special design for specific flow rates
ET
Electronic Timer
FM
Flow Meter(s) fitted.
HP
System LC or CF with High Pressure Sensor
IS
Internal Switches suitable for Ex i circuits.
MO
Manual Override fitted.
MT
Mechanical Timer.
OA
On/Off switch controlling Protective gas and logic supply.
OB
On/Off switch controlling logic supply only.
OC
On/Off switch controlling Protective gas supply only.
OS
Outlet (Orifice) Selector valve.
OV
Outlet valve, pneumatically operated.
PA
"Ex" switch(es) built-in, with/without "Ex" junction box.
PC
PE Pressure Control Leakage Compensation Valve (CLAPS System.)
PO
Pneumatic Output signals for Power and Alarm control.
SP
Secondary Pressurization supply options.
SS
Separate Supply for Protective gas and Logic air.
TW
Twin (or more) outputs for two or more separate pressurized enclosures purged in parallel
Old Name:
Expo Telektron Safety System Limited
New name:
Expo Technologies Limited
A change of the Applicant’s name on the certificate and the substitution of the new name for the
old name on the approved label affixed to the purge controllers:
Any suitably ATEX, Category 2 approved cable gland may be used, if it can be used with the
ambient temperature range.
An Ex e terminal box is provided within the main enclosure for connection of the heater leads. This
polyester box is manufactured by Bartec and coded Ex e II T6 under BAS 98ATEX3008X. Other
alternative ATEX terminal boxes may be used as a replacement if they are suitably certified, carry
the same or greater ambient temperature range, occupy the same or smaller physical space, have
the same certification code and have the same Temperature Class.
RTDs are fitted to the air inlet pipe-work and inside the purge controller enclosure.
The enclosure is made from 1.5mm or 2.5 mm thick stainless or mild steel painted and the lid is
made from 1.5 mm thick stainless steel, lined with 38 mm thick insulation, or other materials with
equivalent insulating properties. The purge inlet, purge outlet and pressure sensing lines are
similarly insulated. The door may optionally be hinged with quick release catches, these will be
fitted with a padlock. An enclosure breather tube is fitted to help prevent condensation. A plastic
clear viewing window may optionally be fitted to the door.
The heater (500 W maximum) is manufactured by Intertec-Hess GmbH and coded Ex d m IIC T3
(max) under PTB 02ATEX1041X. If the outer enclosure is reduced in size the power of the heater
may be reduced in proportion to the reduction in surface area. Other alternative heaters may be
used as a replacement if they are suitably certified, carry the same or greater ambient
temperature range, occupy the same or smaller physical space, have the same certification code
and have the same or more restrictive Temperature Class.
Form 9400 Issue1
II 2(2) G D
Page 4 of 7
The ATEX coding is modified to:
[Ex pD] II T200°C 21 (Ta = -20°C to +55°C) [Ex pD] II T85°C 21 (Ta = -20°C to +55°C) -
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
(used with the low temperature versions)
(used with the standard temperature versions)
To permit the pressurisation of enclosures for the exclusion of combustible dusts in accordance
with IEC61241-4:2001 and modification of the marking to include one of the following:
This certificate and its schedules may only be
reproduced in its entirety and without change.
i.
Sira 01ATEX1295X
Issue 8
CERTIFICATION
The purge controller to be fitted inside an additional, heated, stainless steel enclosure that allows
it to be used down to -50oC.
Variation 2 This variation introduced the following change:
ii.
i.
Variation 1 This variation introduced the following changes:
EC TYPE-EXAMINATION CERTIFICATE
EC TYPE-EXAMINATION CERTIFICATE
Sira 01ATEX1295X
Issue 8
SCHEDULE
SCHEDULE
CERTIFICATION
Following appropriate re-assessment to demonstrate compliance with the requirements of the EN
60079 series of standards, the documents originally listed in section 9, EN 50014:1997
(amendments A1 to A2) and EN 50016:1995, were replaced by EN 60079-0:2006, EN 60079-1:2004,
EN 61241-0:2006 and EN 61241-1:2006, the markings in section 12 were updated accordingly.
The removal of special conditions for safe use that were not specifically associated with the
equipment covered by this certificate.
To permit the inclusion of the following coding for the Low Temperature MiniPurge Enclosure:
Ex [p] dem IIC T4
Ex pD II 21 T135°C
(Ta –50oC to +55oC)
The introduction of the /ET version, an alternative to the pneumatic or mechanical timer system,
this incorporates an Electronic Timer Module ETM-IS**-*** in the Mini Purge, the certification
includes ‘ia’ marking when the ETM is fitted.
The dust marking was changed to be consistent with the marking for gases and vapours.
The introduction of a high pressure sensor for the LC option.
Following appropriate re-assessment to demonstrate compliance with the requirements of the
latest EN 60079 series of standards, the documents previously listed in section 9, EN 60079-0:
2006 and EN 60079-2: 2004 were replaced by those currently listed (EN 61241-0: 2006 was
removed as this is incorporated into the current version of 60079-0), the markings in section 12
were updated accordingly and a new condition of certification was added.
Date
3 July 2002
29 March 2004
30 September 2004
19 September 2006
Form 9400 Issue1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Issue
0
1
2
3
Page 5 of 7
Report no.
R53A7169A
R53V11342A
R51A11080A
R51A15629A
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Comment
The release of prime certificate.
The introduction of Variation 1.
The introduction of Variation 2.
The re-issue of Variation 2 to include the changes
described in report number R51A15629A.
Associated Sira Reports and Certificate History
Refer to Certificate Annexe.
Drawings
14.2
DESCRIPTIVE DOCUMENTS
14.1
The recognition of the Applicant’s address change from Summer Road, Thames Ditton, Surrey KT7
0RH to Unit 2, The Summit, Hanworth Road, Sunbury on Thames, Surrey TW16 5DB.
14
i.
Variation 7 - This variation introduced the following changes:
i.
Variation 6 - This variation introduced the following changes:
ii.
iii.
i.
Variation 5 - This variation introduced the following changes:
i.
Variation 4 - This variation introduced the following changes:
ii.
i.
Variation 3 This variation introduced the following changes:
This MiniPurge Control Unit shall be incorporated into equipment and the appropriate Conformity
Assessment Procedures applied to the combination as defined by Directive 94/9/EC. This certificate
does not cover the combination.
15.4
Form 9400 Issue1
Page 6 of 7
Holders of Type Examination Certificates are required to comply with the production control
requirements defined in Article 8 of directive 94/9/EC.
17.2
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
The use of this certificate is subject to the Regulations Applicable to Holders of Sira Certificates.
17.1
This certificate and its schedules may only be
reproduced in its entirety and without change.
CONDITIONS OF CERTIFICATION
17
The relevant EHSRs that are not addressed by the standards listed in this certificate have been
identified and individually assessed reports listed in Section 14.2.
ESSENTIAL HEALTH AND SAFETY REQUIREMENTS (EHSRs)
The values of the safety parameters shall be set in accordance with the equipment certificate that
covers the combination of the pressurised enclosure(s) and MiniPurge Control Unit.
15.3
16
The installer/user shall ensure that the MiniPurge Control Unit is installed in accordance with the
equipment certificate that covers the combination of the pressurised enclosure(s) and MiniPurge
Control Unit.
15.2
The purge controller, low temperature version, shall be protected by a safety related system that
ensures that it cannot be energised if the temperature of the air inlet or purge controller falls below 20oC. This system shall utilise the RTDs that are fitted to the purge controller to provide the
appropriate level of system integrity, i.e. a level of operational safety of Cat 3 according to EN 954-1 for
ATEX Category 2 (Zone 1) applications; note that these RTDs have not been assessed as a safety
related device in accordance with EHSR 1.5 of Directive 94/9/EC.
When using the AO, AS and DT options, the recommendations for the additional requirements of Ex p
apparatus contained within EN 60079-14 shall be applied.
15.5
SPECIAL CONDITIONS FOR SAFE USE (denoted by X after the certificate number)
R25983A/00
R29097A/00
Comment
This Issue covers the following changes:
• All previously issued certification was rationalised
into a single certificate, Issue 4, Issues 0 to 3
referenced above are only intended to reflect the
history of the previous certification and have not
been issued as documents in this format.
• The introduction of Variation 3.
The introduction of Variation 4.
This Issue covers the following changes:
• This certificate history was modified to recognise
that that Variation 2 was re-issued, subsequent
Variations have therefore been re-numbered.
• The introduction of Variation 5.
The introduction of Variation 6.
The introduction of Variation 7.
15
07 December 2011
05 October 2012
7
8
R51L19695A
R23665A/00
Report no.
R51L15966B
Sira 01ATEX1295X
Issue 8
CERTIFICATION
15.1
18 February 2009
22 December 2010
Date
7 June 2007
5
6
Issue
4
EC TYPE-EXAMINATION CERTIFICATE
EC TYPE-EXAMINATION CERTIFICATE
Sira 01ATEX1295X
Issue 8
SCHEDULE
SCHEDULE
CERTIFICATION
The following routine tests shall be performed by the manufacturer:
17.4
Form 9400 Issue1
Page 7 of 7
The Purge Controllers: Sub-MiniPurge, MiniPurge, Super-MiniPurge, Super-MiniPurge
1800/3500/7000/7000X shall not be marked as suitable for use in explosive dust atmospheres when a
non-metallic or painted housing is used.
17.7
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
The certification code that is appropriate to Purge Controllers low temperature version shall appear in
the product marking applied to outer stainless steel enclosure.
17.6
This certificate and its schedules may only be
reproduced in its entirety and without change.
The products covered by this certificate incorporate previously certified devices, it is therefore the
responsibility of the manufacturer to continually monitor the status of the certification associated with
these devices, and the manufacturer shall inform Sira of any modifications of the devices that may
impinge upon the explosion safety design of the products.
17.5
Where the HP is specified an overpressure shall be simulated whilst the MiniPurge Control Unit is
cycling, it shall be verified that the controller provides the appropriate output and resets.
Verification of Purging Overpressure protection
An air supply failure shall be simulated whilst the MiniPurge Control Unit is cycling, it shall be verified
that the controller provides the appropriate output and resets.
Verification of Air Supply Failure Protection
A purge failure shall be simulated whilst the MiniPurge Control Unit is cycling, it shall be verified that
the controller provides the appropriate output and resets.
Verification of Purge Failure Protection
An overpressure loss shall be simulated whilst the MiniPurge Control Unit is cycling, it shall be verified
that the controller provides the appropriate output and resets.
Verification of Minimum Overpressure Cut Off
The switches incorporated in the PA option shall be suitably certified for Category 2.
Sira 01ATEX1295X
Issue 8
17.3
EC TYPE-EXAMINATION CERTIFICATE
SCHEDULE
CERTIFICATION
EXPO Technologies Limited
Equipment:
Applicant:
Sheet
1 to 4
1 to 2
1 of 1
1 of 1
1 of 1
Rev.
3
2
1
1
1
Date
02 Jul 02
21 May 01
21 Sep 00
21 Sep 00
21 Sep 00
Sheet
1 of 1
Rev.
3
Date
Description
22 March 04 Low Temperature Housing - General Arrangement
Description
Certification label
Low temperature housing wiring certification drawing.
Sheet
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 to 2
1 to 2
Sheet
1 to 5
Rev.
02
03
02
02
02
02
02
03
03
02
02
02
02
01
01
01
01
02
01
04
06
03
Rev.
5
Date
15 Mar 07
09 Jul 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
18 Apr 07
27 Mar 07
15 Mar 07
25 Apr 07
15 Mar 07
20 Feb 07
20 Feb 07
Date
30 Aug 06
Form 9400 Issue 1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Number
EP99-3-1
EP99-2-1
EP99-2-3
EP99-2-2
EP99-2-7
EP99-2-8
EP99-2-9
EP99-2-10
EP99-2-11
EP99-2-12
EP99-2-14
EP99-2-17
EP99-2-16
SD7533
SD7535
SD7536
SD7538
SD7449
SD7500
SD7448
SD7281
SD7282
Issue 4
Number
SD7281
Page 1 of 2
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Description
Minipurge Control Unit – General Assembly
Schematic - Type x Leakage Compensation
Sequence Diagram - Type x Leakage Compensation
Schematic - Type x Continuous Flow
Schematic – Separate Supply and Mechanical Timer
Schematic – Delay Before Trip and On/Off
Schematic – Twin Output and Manual Override
Schematic – Pressure Control Leakage Compensation
Internal “IS” Switches
Schematic – Containment System and Secondary pressurisation
Schematic – Continuous Flow with 2 Flow Rates
Schematic – Continuous Flow with High Pressure
Schematic – Outlet Valve Control
Schematic – Dust Protection
Spark Arrestor
Differential Flow Monitor
Continuous Flow Outlet Orifice
Wiring Diagram – Low temperature
Outlet Orifice Closing Device
Low Temperature Housing
Certification Label Details
MiniPurge Data Sheet
Description
Certification label
Issue 3 (The drawings associated with this issue were replaced by those listed in Issue 4)
Number
Sheet
Rev.
Date
SD7281*
1 to 5
4
17 Dec 03
SD7449
1 of 1
1
18 Dec 03
* Modified by Sira 30 September 2004
Issue 2 (The drawings associated with this issue were replaced by those listed in Issue 4)
Number
SD7448
CERTIFICATION
Description
MiniPurge ATEX Certification Labelling
MiniPurge ATEX Certification Type Numbering Scheme
MiniPurge, Continuous Flow with /HP Sensor –Schematic diagram
RLV, outlet orifice
Outlet Valve Control Circuit Diagram
Issue 1 (The drawings associated with this issue were replaced by those listed in Issue 4)
Number
SD7281
SD7282
EP/99-2-17
EP99-7-7
EP99-7-9
Issue 0 (The drawings associated with this issue were replaced by those listed in Issue 4)
Sira 01ATEX1295X
Purge Controllers
Sub-MiniPurge, MiniPurge, Super-MiniPurge,
Super-MiniPurge 1800/3500/7000/7000X
Certificate Number:
Certificate Annexe
Sheets
1 to 3
Sheets
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1&2
1 to 3
1 of 1
Sheets
1 to 2
1 to 2
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1 of 1
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Rev.
10
Rev.
6
5
9
2
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05
Form 9400 Issue 1
CERTIFICATION
Date (Sira stamp)
05 Oct 12
Date (Sira stamp)
23 Nov 11
23 Nov 11
23 Nov 11
23 Nov 11
Date (Sira stamp)
23 Dec 10
21 Dec 10
21 Dec 10
21 Dec 10
Page 2 of 2
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Title
Minipurge Certification Label
Description
Minipurge Low Temperature Housing
Minipurge Data Sheets
Minipurge ATEX/IECEx Certification Label
Minipurge Dust Protection Schematic
Description
Minipurge ATEX/IECEx Certification Label
MiniPurge Data Sheet
MiniPurge electronic timer
MiniPurge HP sensor
Description
Minipurge ATEX/IECEx Certification Label
Minipurge Low temperature Housing
Description
Fault Evaluation
Outlet Valve Circuit N/O
Outlet Control Valve N/C
Schematic – Type Z or Y leakage compensation
Schematic Type Z or Y Continuous Flow
Sequence Diagram – Type X Continuous Flow
Schematic – Alarm only and Alarm Action Selector
Schematic – Door Switch Active Alarm and Alarm Cancel
RLV Configurations
Alternative Z&Y LC System
Alternative Z&Y LC System
Date (Sira stamp)
12 Feb 09
12 Feb 09
Date
20 Feb 07
15 Mar 07
15 Mar 07
09 Jul 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
05 Jul 07
09 Jul 07
09 Jul 07
This certificate and its schedules may only be
reproduced in its entirety and without change.
Number
SD7281
Issue 8
Number
SD7448
SD7282
SD7281
SD7533
Issue 7
Number
SD7281
SD7282
SD7913
SD7914
Issue 6
Number
SD7281
SD7448
Issue 5
Rev.
01
02
01
02
01
02
02
02
01
01
01
EXPO Technologies Limited
Applicant:
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Purge Controllers
Sub-MiniPurge, MiniPurge, Super-MiniPurge,
Super-MiniPurge 1800/3500/7000/7000X
Equipment:
Number
SD7537
EP99-7-9
EP99-7-9
SD7531
SD7532
EP99-2-4
EP99-2-5
EP99-2-6
SD7555
SD7556
SD7556
Sira 01ATEX1295X
Certificate Number:
Certificate Annexe
MiniPurge Interface Unit MIU/e
User Instruction Manual
Manufacturer:
Model Type & Rating:
Certificates:
Hazardous Area Marking
Code:
Expo Technologies Ltd, Unit 2 The Summit, Sunbury on Thames. UK.
MIU/e1
MIU/e2
MIU/e1/MO
400V / 7A
400V / 7A
400 V / 2A
IECEx ITS10.0003X
Ex e IIC T5 Gb
Ex tb IIIC T100°C Db IP66
Tamb -20°C to +55°C
Ex e IIC T4 Gb
Tamb -20ºC to +60ºC
ITS 10ATEX37092X
II 2 G D
Ex e IIC T5 Gb
Ex tb IIIC T100°C Db IP66
Tamb -20°C to +55°C
II 2 G D
Ex e IIC T4 Gb
Tamb -20°C to +60°C
TUV 12.1463
Ex e IIC T5 Gb
Ex tb IIIC T100º Db IP66
Tamb -20°C to +55°C
APPLICATION SUITABILITY
The MiniPurge Interface Units – MIU/e are certified for use in Hazardous Areas where the Hazardous Area is non-mining
(i.e. above ground) and the hazard is caused by flammable gasses or vapours.
The systems may be used in ATEX/IECEx Gas Zones 1 & 2, Gas Groups IIA, IIB & IIC and in Dust Zones 21 & 22, Dust
Groups IIIA, IIIB & IIIC.
The following materials are used in the construction of MIU/e: Stainless Steel, Steel, Brass, Copper, Polyamide, Silicone.
If substances that will adversely affect any of these materials are present in the surrounding environment, please consult
Expo Technologies for further guidance. This equipment is designed for use under normal industrial conditions of ambient
temperature, humidity and vibration. Please consult Expo Technologies before installing this equipment in conditions that
may cause stresses beyond normal industrial conditions.
WARNING - Only install, commission, inspect, maintain or fault find when safe to do so.
INSTALLATION
The MIU/e shall be installed in accordance with relevant standards, such as EN 60079-14 and any local codes of practice
that are in force. Cable glands or other cable entry devices shall be appropriately certified and suitable for the cable and
the conditions of use and be installed in accordance with the manufacturer’s instructions.
The MIU/e shall be connected to the Purge and Pressurization system in accordance with the instructions given in the
handbook supplied with the pressurization system.
The external earth connection of the MIU/e shall be connected to earth using minimum 4mm2 conductor.
TERMINALS
MIU/e may be fitted with a combination of:
WDU2.5 terminals certified to KEMA 98ATEX1683U & IECEx ULD05.0008U
SAK2.5 terminals certified to KEMA 98ATEX1798U & IECEx KEM06.0014U
WPE2.5 Earth terminals certified to KEMA 98ATEX1683U & IECEx ULD05.0008U
For all type of terminals:
Tightening torque range: 0.4 to 0.8 Nm (WDU & WPE) & 0.4 to 0.6 Nm (SAK)
Conductor cross section maximum 2.5 mm2, minimum 1.5 mm2
Type of connection is screwed - Solid copper conductors to be used.
Stripping length shall be 10 mm.
Only one conductor is allowed at each side of a terminal. Multiple conductors shall be crimped together before screwed
into the terminal.
Maximum number of terminals:
For Model MIU/e1 – Up to 18 current carrying terminals
For Model MIU/e2 – Up to 33 current carrying terminals
For Model MIU/e1/MO – Up to 13 current carrying terminals
COMMISSIONING
The installation of the cable glands, electrical and earth connections shall be inspected for correct installation before the
unit is put into service. The lid shall be correctly fitted.
MAINTENANCE
The condition of enclosure and associated cable glands shall be inspected for damage every six months. The terminals
shall be inspected for tightness and gaskets inspected for damage.
FAULT FINDING
When wiring or signal fault occurs, check each terminated wire, terminals for tightness and gaskets for damage.
External faults such as broken switches within the Control Unit may also require investigation.
ML358 v6
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21-Mar-14
Downloaded from:
http://iecex.iec.ch/iecex/iecexweb.nsf/certificatesAjax/IECEx20PTB2007.0045X
The page at http://iecex.iec.ch says: 1. Certificates shown on this site are not required to be
signed by the issuing Certifying Body because Certificates availability here is evidence of the
Certifying Body's approval.
With
European
Directives
EC-Declaration of
Conformity
Expo Technologies Ltd
Unit 2, The Summit, Hanworth Road
Sunbury on Thames TW16 5DB, UK
This is to declare that
Purge Controllers Type “MiniPurge”
are manufactured in conformity with the following
European Directives and standards:
Electromagnetic Compatibility Directive 2004/108/EG
MiniPurge Systems with a /PO suffix in the type number are non-electrical and are outside the scope
of the EMC Directive.
MiniPurge Systems with suffices /PA or /IS incorporate one or more volt-free (“dry”) contacts which
work in circuits specified by others. In normal operation these circuits are “benign” and no CE mark is
appropriate.
MiniPurge Systems with Electronic Timer (Option /ET) are designed to conform to the EMC Directive,
in compliance with EN 61000-6-4:2007 and EN 61000-6-2:2005 (Intertek Report EM10048000).
Low Voltage Directive 2006/95/EC
MiniPurge Systems are intended for use in potentially explosive atmospheres (Hazardous Areas) and
are therefore excluded from the Low Voltage Directive.
Pressure Equipment Directive 97/23/EC
MiniPurge Systems are classified as not higher than category I under Article 9 of this Directive and
intended for use in potentially explosive atmospheres (Hazardous Areas) and are therefore excluded
from the Pressure Equipment Directive.
ATEX Directive 94/9/EC
MiniPurge Systems are designed to conform to the ATEX Directive, in compliance with:
EN 60079-0 : 2012 + A11:2013
EN 60079-2 : 2007
EN 61241-4 : 2006
MiniPurge Systems are certified by SIRA Certification Service, Rake Lane, Eccleston, Chester CH4 9JN,
England, under EC Type-Examination Certificate SIRA 01ATEX1295X, in compliance with:
IEC 60079-0 : 2011
EN 60079-2 : 2007
EN 61241-4 : 2006
According to the model, MiniPurge Systems are rated and shall be marked as follows:
MiniPurge, X & Y models
MiniPurge, Z models
Group II Category 2G & 2G
Group II Category 3G & 3D
II 2(2) GD
II 2(3) GD
MiniPurge systems are manufactured under Production Quality Assurance Notification
SIRA 99 ATEX M043, issued by SIRA Certification Service, Notified Body No 0518.
John Paul de Beer
Managing Director
S:\Files\QA\CERTS\C-OF-C\Minipurge CE SC004 Issue6.doc
Date 02/09/2014
Confidential Assessment file reference SC004
Expo Technologies Ltd.
Unit 2, The Summit
Hanworth Road
Sunbury on Thames
TW16 5DB
Tel
Fax
E-mail:
+ 44 (0) 20 8398 8011
+ 44 (0) 20 8398 8014
sales@expoworldwide.com
Expo Technologies Inc.
9140 Ravenna Road Unit #3
Twinsburg
OH 44087
USA
Tel:
Tel:
Fax:
E-mail:
+1 888-NFPA-496
+1 (440) 247 5314
+1 (330) 487 0611
sales.na@expoworldwide.com
www.expoworldwide.com
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