PVR DRY 250 Operating And Maintenance Instructions Manual

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PVR DRY 250 Operating And Maintenance Manual | Manualzz
DRY 100
DRY 250
DRY 300
Claw vacuum
pumps
Operating and maintenance
instructions
Publication Number:
LI 2078.05 April 2021
EN
TRANSLATION
Operating and maintenance instructions
EN
Index
1. General information...............................................................................................page 3
2. Product specifications ........................................................................................ page 4
2.1 Pump description.............................................................................................. page 4
2.2 Expected use..................................................................................................... page 4
2.3 Forbidden use................................................................................................... page 4
3. Safety rules.............................................................................................................page 5
4. Transport/handling ............................................................................................. page 6
4.1 Lifting................................................................................................................. page 6
4.2 Unpacking and components control............................................................... page 6
4.3 Storage.............................................................................................................. page 6
5. Commissioning and operation.............................................................................page 7
5.1 Location...............................................................................................................page 7
5.2 Electric connection............................................................................................page 7
5.3 Connection to the machine.............................................................................. page 8
5.4 Discharge air pipe line installation.................................................................. page 8
5.5 Commissioning................................................................................................. page 8
5.6 Tips for use........................................................................................................ page 9
6. Maintenance and spare parts............................................................................. page 9
6.1 Maintenance...................................................................................................... page 9
6.2 Spare parts........................................................................................................ page 9
7. Lubricants............................................................................................................... page 9
8. De-commissioning...............................................................................................page 10
9. Return for repair...................................................................................................page 10
10. Disposal................................................................................................................page 10
Attachments
Technical data sheet, exploded view and parts list (RDT)
EC declaration of conformity (DC)
Electric motor operating instructions
Instructions for the accessories
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LI 2078.05
Operating and maintenance instructions
EN
1. General information
This manual contains information necessary for the proper operation of the pump in
order to prevent unsuitable use and for the safety of the operators. Do not attempt any
other type of operation without having first contacted our Service Department. The
information provided herewith does not intend to replace, integrate or change any rules,
regulations, law by decree, directive or law of specific character in force in the Country
where the installation takes place.
The suggestions given to the staff engaged in the installation and servicing assumes
that the personnel is expert and prepared in facing any problem of servicing, both
mechanical and electrical. For any questions or information not included in this manual,
please contact our Service Department, always providing: model (Model), serial number
(Serial), year of manufacture, stated on the pump name plate.
Symbols used:
WARNING:
Instructions that, if not followed, could result in serious
personal injuries.
NOTE:
Instructions that, if not followed,
could result in pump damages.
HOT SURFACES
LI 2078.05
ELECTRIC SAFETY
FIRE HAZARD
READ THE OPERATING
INSTRUCTIONS
INLET PORT
HARMFUL SUBSTANCES
EMISSIONS
EXHAUST PORT
DO NOT DISPOSE INTO
THE ENVIRONMENT
DISPOSAL
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Operating and maintenance instructions
EN
2. Product specifications
2.1 Pump description
The vacuum pumps of the DRY series have got two rotors having a claw shape, which
are rotating syn-chronised by a pair of gears. The pumping chamber is lubricant and seal
fluid free. The gears are oil lubri-cated and the same oil is used to lubricate the bearings.
The oil tank is separated from the pumping chamber by means of labyrinth seals. Pump
cooling is assured with a fan.
The electric motor is flanged and it is connected to the lower shaft by means of a coupling.
2.2 Expected use
The pumps of the DRY series have been designed to handle air and small quantity of water
vapour. They are suitable for the evacuation of closed systems or for the operation at a
maximum 150 mbar (DRY 100) and 200 mbar (DRY250 / DRY 300) continuous vacuum.
The recommended ambient and suction tempera-ture must be between 5°C and 40°C.
2.3 Forbidden use
ATTENTION:
The pump MUST NOT handle:
- liquids or solid substances;
- dangerous, explosive or aggressive gases and vapours;
- pure oxygen or air mixtures enriched with oxygen;
It is forbidden to use the discharge of the pump to create even limited pressures.
ATTENTION:
It is forbidden to install the pump in a potentially explosive environment.
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LI 2078.05
Operating and maintenance instructions
EN
3. Safety rules
WARNING:
Despite of all the precautions adopted when designing the equipment, there are
some risk elements that arise during operation and servicing.
HOT SURFACES
The temperature of the pump surfaces may exceed 80°C.
Install the pump in a protected area accessible only by authorized personnel, to prevent
possible personal injures due to contact with hot surfaces.
The pump can be placed inside other machines by adopting the necessary safeguards.
Before carrying out any maintenance on the pump, be sure the pump is cold.
HAZARD CAUSED BY VACUUM
Any contact with parts under vacuum can cause injuries.
Avoid any contact with the pump inlet port during the pump operation. Introduce air in
the inlet circuit before every operation cycle.
FOR A SAFE MAINTENANCE
All maintenance operations must be carried out with the pump idle, disconnected from
the electrical supply, with the pump cold, vented to atmospheric pressure. Prevent
unexpected start-up (e.g. block the power switch with a personal lock).
ELECTRIC SAFETY
Some components of the electric equipment are electrically charged during operation.
Any contact may cause serious injuries to persons or objects.
Connection and control of the electric system must be carried out by skilled personnel
only.
The electrical equipment must comply with the EN 60204-1 standard and with any other
law in force in the Country of use.
Besides, electrical equipment must comply with EN 61000-6-4 and EN 61000-6-2
standards concerning electromagnetic compatibility and electromagnetic immunity
for industrial environment.
FIRE HAZARD
WARNING! The use of the pump in situations unforeseen or not recommended by this
manual, as well as lack of correct maintenance, may create high risks for overheating
or fire.
In case of a fire do not use water to extinguish but use a powder CO2 extinguisher or
other means compatible with the electrical equipment and lubricating oil.
LI 2078.05
5
Operating and maintenance instructions
EN
4. Transport/handling
4.1 Lifting
Use the suitable lifting eyebolt located on the equipment.
4.2 Unpacking and components control
When receiving the machine, check that the packing is intact or if is shows signs of
damages occurred during transportation.
If there is no damage, proceed to the unpacking and check further the machine.
In case damages are found, inform immediately P.V.R. and the carrier.
4.3 Storage
The pumps must be stored or transported without oil and protected from the atmospheric
agents at a temperature between -15°C and 70°C (normal humidity rate max. 95% non
condensing).
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LI 2078.05
Operating and maintenance instructions
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5. Commissioning and operation
5.1 Location
Install the pump so that the inlet (5) and the outlet (6) are at least 20 cm away from
the closest walls.
Oil filling port (1), oil sight glasses (2) and oil drainage ports (3) must be easily accessible.
5
7
1
4
8
2
6
3
2
3
5
5.2 Electric connection
The control panel and electric connections must be carried out by skilled personnel
and conform to the EN 60204-1 rules or to other local regulations in the Country of use.
The electric equipment must comply with EN 61000-6-4 and EN 61000-6-2 standard
concerning electromagnetic compatibility, emission standard and immunity for industrial
environments.
Check the main voltage and frequency in use to correspond to the data stamped on the
motor name plate.
The electric motor must be protected against overload. The full load amperage value on
the motor name plate must be considered when sizing the electrical components and
motor protection against overloading.
Make sure the grounding is correctly done.
Carry out the electric connection following the diagram shown on the motor terminal box.
Check direction of rotation by starting the pump for a short time (2-3 seconds). The correct
direction is shown by the arrow on the pump. In case of wrong rotation, it is necessary
to change the motor rotation by exchanging position of two of the three connections in
the motor terminal box.
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Operating and maintenance instructions
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5.3 Connection to the machine
The connection to the chamber to be pumped down must be carried out by means of
pipes of the same diameter as the inlet port.
Pipe weights and expansions, if any, must not rest on the pump.
It is advisable to make the final connection to the pump inlet port with flexible pipes or
fittings.
It is important that all the pipes and the different fittings are tight.
Very long or small diameter pipes decrease the pump performances.
This symbol identifies the inlet port.
For further information, please refer to the RDT attached herewith.
5.4 Discharge air pipe line installation
If the pump has been installed in a room with poor air exchange, it is possible to pipe the
pump discharge air to other rooms or outside.
Use pipes with the same diameter as the tank discharge port with a maximum length
of 15 m.
For longer pipes increase pipe diameter. Pipe weights must not rest on the pump.
In the final length use flexible pipes or pipe fittings.
NOTE:
this pipe must be descending, to avoid the condensate going back to the tank.
WARNING:
do not connect ball valves to this pipeline.
This symbol identifies the exhaust port.
For further information, please refer to the RDT attached herewith.
5.5 Commissioning
a) Fill oil through the oil filler port (1) until the middle level of the oil sight glass (2).
b) Switch the motor on for a few seconds so that to check the direction of rotation.
c) Connect the intake piping to the fitting (7).
The vacuum relief valve (8) allows to manually regulating the vacuum.
ATTENTION:
Do not remove the vacuum relief valve; Do not operate the pump continuously
below 150 mbar for DRY 100 pump and below 200 mbar for DRY250 / DRY 300.
Continuous operation at lower pressures may result in serious pump damage
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Operating and maintenance instructions
EN
5.6 Tips for using
Do not exceed 10 starting/hour. For more frequent starting, install a soft-start device.
Air can be discharged to the atmosphere through a discharge silencer or it can be piped
else-where. Pump performance decreases if the pipelines are too small or too long.
6. Maintenance and spare parts
6.1 Maintenance
All maintenance operations must be carried out with the pump idle, disconnected form
the elec-trical supply, with the pump cold, vented to atmospheric pressure.
Check the oil level through the suitable oil sight glasses (2) periodically. If needed, top it up.
Change the oil every 5000 (Rotant VF805)/10000 (Rotant VF 315) hours of operation,
draining the exhausted oil through the discharge ports (3). Use a oil ISO VG 150.
When changing the oil also check the coupling elastic element, replace it if required.
Used oil must be disposed of according to local regulations.
If there is an external inlet filter, keep it cleaned to allow full pump performance.
6.2 Spare parts
When ordering spare parts, always state the pump model, serial number, year of production, electric motor characteristics (manufacturer’s name, model, kW, V, Hz), position
reference on the spare parts list, description and quantity needed.
7. Lubricants
Synthetic oil recommended for generic use
Use the synthetic oil for compressors.
LI 2078.05
Ambient temperature
Grade
PVR oil
5 - 40°C
ISO 150
Rotant VF 315
5 - 40°C
ISO 150
Rotant VF 805
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Operating and maintenance instructions
EN
8. De-commissioning
Drain the oil from the pump prior to the removal.
If the oil is polluted, flush the pump with fresh oil (see “oil change”).
Drain the oil from the tank, plug the inlet and the discharge ports and store the pump
without oil.
In case of pump disposal, separate the pump parts by materials and trash the parts in
accordance with the local regulations in the Country of use.
9. Return for repair
In case of pump return for repair to P.V.R., provide a list of substances which have come
in contact with the pump and advise the risks involved in handling, if any. Drain the
lubricant from the pump prior to shipping the pump back.
10. Disposal
Meaning of the “WEEE” logo found in labels
The following symbol is applied in accordance with the EC WEEE (Waste Electrical
and Electronic Equipment) Directive.
This symbol (valid only in countries of the European Community) indicates that the
product it applies to must NOT be disposed of together with ordinary domestic or
industrial waste but must be sent to a differentiated waste collection system.
The end user is therefore invited to contact the supplier of the device, whether the
Parent Company or a retailer, to initiate the collection and disposal process after
checking the
contractual terms and conditions of sale.
10
LI 2078.05
PVR Srl
HEADQUARTERS:
Via Santa Vecchia, 107 - 23868 Valmadrera (LC), Italy
T +39 0341 1918 51 - F +39 0341 1918 599
[email protected] - www.pvr.it
LOCAL UNIT:
Via IV Novembre, 104F
23868 Valmadrera (LC), Italy

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Key Features

  • Claw vacuum pump
  • Dry operation
  • 200 mbar max vacuum
  • Oil lubricated gears
  • Fan cooled
  • Oil sight glass
  • Discharge silencer

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Frequently Answers and Questions

What is the maximum continuous vacuum for the PVR DRY 250?
The maximum continuous vacuum for the PVR DRY 250 is 200 mbar.
What type of oil should be used for the PVR DRY 250?
Use a synthetic oil for compressors with an ISO 150 grade.
How often should I change the oil in the PVR DRY 250?
Change the oil every 10,000 hours of operation.
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