Krohne DK 32 Purge set Handbook

MA_DK32_Purge_R02_en_898801_PRT.book Page 1 Wednesday, April 6, 2011 3:01 PM

DK32

Handbook

Panel mount purge set with DK32 flowmeter

© KROHNE 04/2011 - 4000898801 MA DK32 Air purge set R02 en


:

IMPRINT

::::::::::::::::::::::::::::::::::::::: DK32

All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without the prior written authorisation of KROHNE Messtechnik GmbH.

Subject to change without notice.

2

Copyright 2011 by

KROHNE Messtechnik GmbH - Ludwig-Krohne-Str. 5 - 47058 Duisburg (Germany) www.krohne.com

04/2011 - 4000898801 MA DK32 Air purge set R02 en


DK32 CONTENTS

1 Safety instructions 5

1.1 Intended use ..................................................................................................................... 5

1.2 Certifications .................................................................................................................... 5

1.3 Safety instructions from the manufacturer ..................................................................... 6

1.3.1 Copyright and data protection ................................................................................................ 6

1.3.2 Disclaimer ............................................................................................................................... 6

1.3.3 Product liability and warranty ................................................................................................ 7

1.3.4 Information concerning the documentation........................................................................... 7

1.3.5 Warnings and symbols used................................................................................................... 8

1.4 Safety instructions for the operator................................................................................. 8

2 Device description 9

2.1 Scope of supply................................................................................................................. 9

2.2 Purge set elements ........................................................................................................ 10

2.3 Nameplate DK32............................................................................................................. 11

2.4 Description code............................................................................................................. 11

3 Installation 12

3.1 Notes on installation ...................................................................................................... 12

3.2 Storage ........................................................................................................................... 12

3.3 Installation requirements .............................................................................................. 12

4 Electrical connections 13

4.1 Safety instructions.......................................................................................................... 13

4.2 Electrical connection of limit switches .......................................................................... 14

4.3 Setting the limit switch................................................................................................... 15

4.4 Ground connections........................................................................................................ 16

4.5 Protection category ........................................................................................................ 16

5 Start-up 17

5.1 Start-up purge set .......................................................................................................... 17

6 Service 18

6.1 Maintenance ................................................................................................................... 18

6.2 Spare parts availability................................................................................................... 19

6.3 Availability of services .................................................................................................... 19

6.4 Returning the device to the manufacturer..................................................................... 19

6.4.1 General information.............................................................................................................. 19

6.4.2 Form (for copying) to accompany a returned device............................................................ 20

6.5 Disposal .......................................................................................................................... 20

04/2011 - 4000898801 MA DK32 Air purge set R02 en www.krohne.com

3


CONTENTS

DK32

7 Technical data 21

7.1 Operating principle......................................................................................................... 21

7.2 Technical data................................................................................................................. 22

7.3 Dimensions ..................................................................................................................... 25

7.4 Flow table DK32.............................................................................................................. 26

7.5 Differential pressure regulators.................................................................................... 29

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Safety instructions


DK32 SAFETY INSTRUCTIONS

1

1.1 Intended use

The variable area flowmeters manufactured by KROHNE Messtechnik GmbH are suitable for measuring gases, vapors and liquids.

These flowmeters are particularly suitable for measuring:

• Liquids

• Hydrocarbons

• Water

• Chemicals with low corrosiveness

• Saturated steam

• Superheated steam

• Industrial gases

DANGER!

In case of instruments which are used in explosive endangered areas please consider the supplementary installation and operating instructions mentioned in the Ex-manual.

WARNING!

The operator shall bear sole responsibility for the use of the flowmeters with regard to suitability, intended use and corrosion resistance of the materials used to the process product.

The manufacturer shall not be liable for any damage resulting from improper use or use for other than the intended purpose.

Do not use any abrasive or highly viscous process products.

1.2 Certifications

CE marking

The flowmeter meets the statutory requirements of the following EC directives:

• Pressure Equipment Directive 97/23/EC

• EMC Directive 89/336/EC for instruments with electrical options

• ATEX Directive 94/9/EC for instruments in Ex-areas

KROHNE Messtechnik GmbH certifies successful testing of the product by applying the CE mark.


5


1

SAFETY INSTRUCTIONS

DK32

1.3 Safety instructions from the manufacturer

1.3.1 Copyright and data protection

The contents of this document have been created with great care. Nevertheless, we provide no guarantee that the contents are correct, complete or up-to-date.

The contents and works in this document are subject to copyright. Contributions from third parties are identified as such. Reproduction, processing, dissemination and any type of use beyond what is permitted under copyright requires written authorisation from the respective author and/or the manufacturer.

The manufacturer tries always to observe the copyrights of others, and to draw on works created in-house or works in the public domain.

The collection of personal data (such as names, street addresses or e-mail addresses) in the manufacturer's documents is always on a voluntary basis whenever possible. Whenever feasible, it is always possible to make use of the offerings and services without providing any personal data.

We draw your attention to the fact that data transmission over the Internet (e.g. when communicating by e-mail) may involve gaps in security. It is not possible to protect such data completely against access by third parties.

We hereby expressly prohibit the use of the contact data published as part of our duty to publish an imprint for the purpose of sending us any advertising or informational materials that we have not expressly requested.

1.3.2 Disclaimer

The manufacturer will not be liable for any damage of any kind by using its product, including, but not limited to direct, indirect or incidental and consequential damages.

This disclaimer does not apply in case the manufacturer has acted on purpose or with gross negligence. In the event any applicable law does not allow such limitations on implied warranties or the exclusion of limitation of certain damages, you may, if such law applies to you, not be subject to some or all of the above disclaimer, exclusions or limitations.

Any product purchased from the manufacturer is warranted in accordance with the relevant product documentation and our Terms and Conditions of Sale.

The manufacturer reserves the right to alter the content of its documents, including this disclaimer in any way, at any time, for any reason, without prior notification, and will not be liable in any way for possible consequences of such changes.

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DK32 SAFETY INSTRUCTIONS

1

1.3.3 Product liability and warranty

The operator shall bear responsibility for the suitability of the device for the specific purpose.

The manufacturer accepts no liability for the consequences of misuse by the operator. Improper installation and operation of the devices (systems) will cause the warranty to be void. The respective "Standard Terms and Conditions" which form the basis for the sales contract shall also apply.

1.3.4 Information concerning the documentation

To prevent any injury to the user or damage to the device it is essential that you read the information in this document and observe applicable national standards, safety requirements and accident prevention regulations.

If this document is not in your native language and if you have any problems understanding the text, we advise you to contact your local office for assistance. The manufacturer can not accept responsibility for any damage or injury caused by misunderstanding of the information in this document.

This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device. Special considerations and precautions are also described in the document, which appear in the form of underneath icons.


7


1

SAFETY INSTRUCTIONS

DK32

1.3.5 Warnings and symbols used

Safety warnings are indicated by the following symbols.

DANGER!

This information refers to the immediate danger when working with electricity.

DANGER!

This warning refers to the immediate danger of burns caused by heat or hot surfaces.

DANGER!

This warning refers to the immediate danger when using this device in a hazardous atmosphere.

DANGER!

These warnings must be observed without fail. Even partial disregard of this warning can lead to serious health problems and even death. There is also the risk of seriously damaging the device or parts of the operator's plant.

WARNING!

Disregarding this safety warning, even if only in part, poses the risk of serious health problems.

There is also the risk of damaging the device or parts of the operator's plant.

CAUTION!

Disregarding these instructions can result in damage to the device or to parts of the operator's plant.

INFORMATION!

These instructions contain important information for the handling of the device.

LEGAL NOTICE!

This note contains information on statutory directives and standards.

• HANDLING

This symbol designates all instructions for actions to be carried out by the operator in the specified sequence.

i RESULT

This symbol refers to all important consequences of the previous actions.

1.4 Safety instructions for the operator

WARNING!

In general, devices from the manufacturer may only be installed, commissioned, operated and maintained by properly trained and authorized personnel.

This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device.

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Device description


DK32 DEVICE DESCRIPTION

2

2.1 Scope of supply

INFORMATION!

Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Check the packing list to check if you received completely all that you ordered.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order.

Check for the correct supply voltage printed on the nameplate.

Figure 2-1: Scope of supply

1 Purge set in the ordered version (acc. to Dwg. ANG 4000775001)

2 Manual

3 Certificates, calibration certificate (supplied to order only)


9


2

DEVICE DESCRIPTION

2.2 Purge set elements

The purge set consists of following elements:

DK32

1 DK32 - Variable-area flowmeter with metering valve

2 Ball valve (on - off)

3 Inlet NPT ½ " - max 270 ° rotatable

4 Outlet NPT ½ " - max 270 ° rotatable

5 Needle valve for setting the required flow rate

6 2" mounting pipe (not included in delivery)

7 Poppet check valve ( ¼ ")

8 Tube: 10x1.5mm (0.39x0.059")

9 Mounting plate incl. 2x U-bolt hanger (for 2" pipe installation)

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DK32 DEVICE DESCRIPTION

2

2.3 Nameplate DK32

INFORMATION!

Before installing the flowmeter, make sure that the information given on the nameplate corresponds to the ordering data.

Figure 2-2: Nameplate

1 Type of meter

2 Manufacturer

3 Appointed ATEX & DGRL body

4 Design data: temperature & pressure rating

5 DGRL data

6 Ex data

7 Electrical connection data

8 Pay regard to manual

9 KROHNE website

Additional markings on the flowmeter:

• SO - sales order / item

• KO - KROHNE order

• Vx - product configurator code

• AC - article code

2.4 Description code

The description code consists of the following elements*:

1 32 - with valve and horizontal connection

2 RE - inlet pressure regulator / RA - outlet pressure regulator

3 K1 - one limit switch / K2 - two limit switches

4 S - plug connector / L - cable gland incl. cable

5 HT - high-temperature version

6 A - limit switch EC type-tested

7 EX - Explosion-protected equipment

8 SK - SIL2 compliance of limit switches acc. to IEC 61508

* positions which are not needed are omitted (no blank positions)


11

Installation


3

INSTALLATION

DK32

3.1 Notes on installation

INFORMATION!

Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Check the packing list to check if you received completely all that you ordered.

INFORMATION!



3.2 Storage

• Store the flowmeter in a dry and dust-free location.

• Avoid lasting direct exposure to the sun.

• Store the flowmeter in its original packaging.

• The permissible storage temperature is from -40 to +80 ° C for standard meters.

3.3 Installation requirements

CAUTION!

When installing the flowmeter in the piping please observe the following points:

• The variable area flowmeter must be installed vertically (measuring principle). The flow direction must be from bottom to top. For installation recommendations please refer also to

VDI/VDE Directive 3513 Sheet 3.

•

•

Before connecting, blow or flush out the pipes leading to the flowmeter.

Pipes for gas flow need to be dried before the flowmeter is installed.

•

•

•

•

•

Use connectors suitable for the particular version of the flowmeter.

Align the pipes axially with the connections on the flowmeter so that they are free of stresses.

If necessary, the piping has to be supported to prevent vibrations being transmitted to the flowmeter.

Do not lay signal cables directly next to cables for the power supply.

If several instruments are installed side by side, a minimum distance between these divices is required (see Technical Data).

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Electrical connections


DK32 ELECTRICAL CONNECTIONS

4

4.1 Safety instructions

DANGER!

All work on the electrical connections may only be carried out with the power disconnected. Take note of the voltage data on the nameplate!

DANGER!

Observe the national regulations for electrical installations!

DANGER!

For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation.

WARNING!

Observe without fail the local occupational health and safety regulations. Any work done on the electrical components of the measuring device may only be carried out by properly trained specialists.

INFORMATION!




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4

ELECTRICAL CONNECTIONS

4.2 Electrical connection of limit switches

The electrical connections for limit switches is effected:

• DK../../S - in the plug connector

• DK../../L - using a preassembled cable.

The following procedures must be performed (DK../../S):

• Slacken screw 6 of the connector plug

• Pull out the plug

• Remove screw 6 completely from the plug

• Insert a screwdriver in the marked opening 5 (Lift) and remove the terminal block.

• Thread the connecting cable through the cable gland.

• Insert the cable (max. 1.5mm

2

) and screw down.

DK32

14

1

2

3

4

Figure 4-1: Electrical connection of limit switches

5 - Lift slot

6 - Fastening screw of terminal box

Contact connection

Min minus

Min plus

Max minus

Max plus

Cable colors of assembled cable white yellow green brown www.krohne.com



DK32 ELECTRICAL CONNECTIONS

4

Connection three-wire reed contact

Figure 4-2: Electrical connection of reed contact limit switch

Strand colours for flowmeters with preassembled cables:

1 Silicone-insulated wire - yellow/green / FEP-insulated wire - red

2 Silicone-insulated wire - brown / FEP-insulated wire - brown

3 Silicone-insulated wire - blue / FEP-insulated wire - blue

4.3 Setting the limit switch

Set the pointers to the desired limit values as a min. contact 1 and max. contact 2 using a slip coupling along the scale.

Figure 4-3: Limit switch settings

Adjusting the limit switch with reed contact:

• Slacken nut 3

• Set reed cartridge to the required value

• Secure with nut 3

Comment

The reed contact is actuated directly by the float magnet. The desired operating point can only be determined in measuring mode. A reference to the scale and/or pointer cannot be established.


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4

ELECTRICAL CONNECTIONS

4.4 Ground connections

Ground connections DK32

DK32

Figure 4-4:

1 Earth connection on the measuring section (M4 threaded hole)

DANGER!

The earth conductor must not transfer any interference voltage. Do not use this earth conductor to ground any other items of electrical equipment.

4.5 Protection category

DANGER!

After all servicing and maintenance work on the flowmeter, the specified protection category

IP65 has to be ensured again.

Therefore it is essential to observe the following points:

• Use only original gaskets. They must be clean and free of any damage. Defective gaskets have to be replaced.

• The electrical cables used must be undamaged and must comply with regulations.

• The cable has to be laid with a loop 3 upstream of the flowmeter to prevent water from getting into the housing.

• The cable glands 1 have to be firmly tightened.

• Close the unused cable glands using blanking plugs 2 .

• Do not remove the specified outer sheath from the cable gland.

16

1 The cable glands have to be firmly tightened.

2 Close the unused cable glands using blanking plugs.

3 The cable has to be laid with a loop.

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Start-up


DK32 START-UP

5

5.1 Start-up purge set

CAUTION!

When starting up the device, the following points must be observed:

• Compare the actual operating pressure and the product temperature of the system with the specifications on the nameplate (PS and TS). These specifications may not be exceeded.

•

•

•

•

Make sure materials are compatible.

Slowly open the shut-off valve 2 .

When measuring gases, increase pressure slowly 5 .

Avoid float impact (e.g. caused by solenoid valves), as this is likely to damage the measuring unit or float.

1 DK32 - Variable-area flowmeter with metering valve

2 Ball valve (on - off)

3 Inlet NPT ½ " - max 270 ° rotatable

4 Outlet NPT ½ " - max 270 ° rotatable

5 Needle valve for setting the required flow rate

6 2" mounting pipe (not included in delivery)

7 Poppet check valve ( ¼ ")

8 Tube: 10x1.5mm (0.39x0.059")

9 Mounting plate incl. 2x U-bolt hanger (for 2" pipe installation)


17

Service


6

SERVICE

DK32

6.1 Maintenance

Within the scope of routine maintenance of the system and pipelines, the flowmeter should also be inspected for signs of fouling, corrosion, mechanical wear and leaks, as well as damage to the measuring tube and indicator.

We advise that inspections be carried out at least once a year.

The device must be removed from the piping before cleaning.

CAUTION!

Pressurized pipes must be depressurized before removing the device.

In the case of flowmeters used for measuring aggressive or hazardous products, appropriate safety precautions must be taken with regard to residual liquids in the measuring section.

Always use new gaskets when reinstalling the flowmeter in the pipeline.

CAUTION!

Under certain circumstances the valve packing gland may have to be adjusted during its service life. This means that the union nut 1 has to be retightened. If necessary, press the retaining pin

2 against its internal spring.

Apply a tightening torque of not more than 5Nm.

CAUTION!

Valves that have not been actuated for a longer period of time may exhibit a higher initial actuation torque.

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DK32 SERVICE

6

6.2 Spare parts availability

The manufacturer adheres to the basic principle that functionally adequate spare parts for each device or each important accessory part will be kept available for a period of 3 years after delivery of the last production run for the device.

This regulation only applies to spare parts which are subject to wear and tear under normal operating conditions.

6.3 Availability of services

The manufacturer offers a range of services to support the customer after expiration of the warranty. These include repair, maintenance, technical support and training.

INFORMATION!

For more precise information, please contact your local representative.

6.4 Returning the device to the manufacturer

6.4.1 General information

This device has been carefully manufactured and tested. If installed and operated in accordance with these operating instructions, it will rarely present any problems.

CAUTION!

Should you nevertheless need to return a device for inspection or repair, please pay strict attention to the following points:

• Due to statutory regulations on environmental protection and safeguarding the health and safety of our personnel, manufacturer may only handle, test and repair returned devices that have been in contact with products without risk to personnel and environment.

• This means that the manufacturer can only service this device if it is accompanied by the following certificate (see next section) confirming that the device is safe to handle.

CAUTION!

If the device has been operated with toxic, caustic, flammable or water-endangering products, you are kindly requested:

• to check and ensure, if necessary by rinsing or neutralizing, that all cavities are free from such dangerous substances,

• to enclose a certificate with the device confirming that is safe to handle and stating the product used.


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6

SERVICE

DK32

6.4.2 Form (for copying) to accompany a returned device

Company: Address:

Department:

Tel. no.:

Name:

Fax no.:

Manufacturer's order no. or serial no.:

The device has been operated with the following medium:

This medium is: water-hazardous toxic caustic flammable

We checked that all cavities in the device are free from such substances.

We have flushed out and neutralized all cavities in the device.

We hereby confirm that there is no risk to persons or the environment through any residual media contained in the device when it is returned.

Signature: Date:

Stamp:

6.5 Disposal

CAUTION!

Disposal must be carried out in accordance with legislation applicable in your country.

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Technical data


DK32 TECHNICAL DATA

7

7.1 Operating principle

The flowmeter operates on the float measuring principle.

The measuring section consists of a metal cone in which a float can move freely up and down.

The medium flows through the flowmeter from bottom to top.

The float adjusts itself so that the buoyancy force A acting on it, the form drag W and its weight G are in equilibrium: G = A + W.

Figure 7-1: Operating principle

For the DK32, DK34 and DK37/M8M 1 the flow-dependent height of the float in the measuring section is transmitted by means of a magnetic coupling and displayed on a scale.

For the DK37/M8E 2 the flow-dependent height of the float in the measuring section is transmitted to the electronic display by means of a magnetic coupling on sensors S1 and S2.


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7

TECHNICAL DATA

DK32

7.2 Technical data

INFORMATION!

• The following data is provided for general applications. If you require data that is more relevant to your specific application, please contact us or your local representative.

• Additional information (certificates, special tools, software,...) and complete product documentation can be downloaded free of charge from the website (Download Center).

DK32 Flowmeter

Measuring system

Application range Flow measurement of liquids, gases and vapors

Operating method / measuring principle Float measuring principle

Measured value

Primary measured value

Secondary measured value

Float position

Operating and standard volumetric flow

Measuring accuracy

Directive

DK32

Operating conditions

Max. operating temperature TS

Operating pressure PS

Test pressure PT

Max. allowable operating pressure PS

Installation conditions

Inlet / outlet run

Weights

DK32

DK32 with differential pressure regulator complete purge set complete with differential pressure regulator

Connection

Inlet - Outlet

Check valve

Max. flow-coefficient

Nom. cracking pressure

Downstream pressure at 20 ° C (70 ° F)

1 higher pressures on request

VDI / VDE Code 3513 Sheet 2 (q

G

=50%)

4.0%

-40..+150 ° C / -112...+302 ° F

Pressure Equipment Directive 97/23/EC

Pressure Equipment Directive 97/23/EC and AD 2000-HP30

130 bar standard 1 non

0.7 kg (1.54 lb)

2.5 kg (5.51 lb)

3.5 kg (7.72 lb)

5.3 kg (11.7 lb)

NPT ½ " female

0.47

0.03bar (1/3 psi)

68.9bar (1000psig)

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DK32 TECHNICAL DATA

7

Materials

DK32

Purge set

Head piece, foot piece, cone upper plug

Standard float

Metering unit

Valve spindle

Valve plug gasket

Metering unit gasket

Indicator IP65

Tube fittings

Threaded connection

Mounting plate

Tube

U-bolt pipe hanger

Body

Packing

On off ball valve

Swagelok ®

SS-43GF4

Poppet check valve

Swagelok ®

SS-4C4-1/3

Body

Gasket

O-ring

1 other gasket materials on request

CrNi steel 1.4404 / 316 L


CrNi steel 1.4404 / 316 L or titanium

CrNi steel 1.4571 / 316 Ti


FPM 1

FPM and PTFE 1

GD-Al / aluminium diecast (powder coated)

CrNi steel 1.4401 / 316

CrNi steel 1.4401 / 316

CrNi steel 1.4301 / 304

CrNi steel 1.4404 / 316L

CrNi steel 1.4571 / 316Ti

CrNi steel 1.4401 / 316

Modified PTFE/D1710 type 1, Grade 1, Class B or UHMWPE/D4020

CrNi steel 1.4401 / 316

PTFE coated CrNi steel 1.4401 / 316

FKM fluorocarbon

Temperatures

Max. process temperature at T amb.

< 40 ° C / 104 ° F

DK32 with valve

DK32 with limit switches

Max. ambient temperature T amb.

[ ° C]

-40...+150

-25/-40...+145

-25...+70

[ ° F]

-40...+302

-13/-40...+293

-13...+158


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7

TECHNICAL DATA

DK32 - Indicator with limit switches

Cable fitting DK32/Kx/S

Cable diameter DK32/Kx/L

Clamp connection DK32/Kx/S

Limit switch

Type

Switch element function

Nominal voltage U

0

Pointer shaft not read

Pointer shaft read

DK32 with reed contact

M16 x 1,5

7 ... 8mm

1.5mm

2

SC2-N0

I7S2002-N

2-wire NAMUR

SJ2-SN 1

Normally closed

8VDC

≥ 3mA

≤ 1mA

2-wire NAMUR

Normally closed

8VDC

≥

≤

3mA

1mA

Switching type

Switching reproducibility

Breaking capacity

Max. supply voltage

Max. current

1 safety oriented

2 reduced values for Ex version

SJ2-S1N 1

2-wire NAMUR

Normally open

8VDC

≤ 1mA

≥ 3mA bistable

<5% of full scale value

12VA 2

30VDC 2

0,5A 2

DK32

Approvals

Standard Indicator

ATEX DK32 mechanical

IEC Ex

FM

DK32 electrical

DK32 electrical

DK32

Nepsi DK32

Designation

II2GD IIC

II3GD IIC

II2G Ex ia IIC T6

Ex ia IIC T6

IS/I/1/ABCD;T6

NI/I/2/ABCD;T6

S/II, III/2/FG;T6

IS/I, II, III/1/A-G

NI/II/2/ABCD

Ex nL IIC T1-T6

Ex nA II T1-T6

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DK32 TECHNICAL DATA

7

7.3 Dimensions

dimensions a

[mm]

["]

363

14.3

b

122

4.8

c

180

7.1

d

188

7.4

e

303

11.9

f max. 195 max. 7.7

g

54

2.1


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7

TECHNICAL DATA

7.4 Flow table DK32

Measuring span:

Declaration of flow:

DK32

10 : 1

Values = 100%

Air: 20 ° C [68 ° F], 1,2 bar abs. [17.4 psia]

Cones

K 005

K 005

K 010

K 010

K 015

K 040

K 080

K 125

K 200

K 300

K 340

1 with titanium float

[l/h]

16 1

50

70 1

100

150

400

800

1250

2000

2500

3400

Air flow rate

[SCFH]

0.6 1

1.9

2.6 1

3.7

5.6

15

30

45

75

90

130

Pressure drop

[mbar] [psig]

66

19

27

55

14

31

66

42

85

117

166

0.21

0.46

0.97

0.97

0.28

0.40

0.81

0.62

1.25

1.72

2.44

INFORMATION!

The operating pressure should be at least twice the pressure loss for liquids, and at least 5 times the pressure loss for gases! The specified pressure drops are valid for water and air at maximum flow rate. Other flow ranges on request. Conversion of other media or operating data

(pressure, temperature, density, viscosity) is performed using the calculation method in accordance with VDI /VDE Directive 3513

The flow measurement of gases are refered to

Nl/h or Nm

3

/h: Volume flow in Normal state 0 ° C, 1.013 bar abs. (DIN 1343)

SCFM or SCFH: Volume flow in Standard state 15 ° C, 1.013 bar abs. (ISO 13443)

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DK32 TECHNICAL DATA

7

DK32 Valves

Measuring span:

Declaration of flow:

10 : 1

Values = 100%

Air: 20 ° C [68 ° F], 1,2 bar abs. [17.4 psia]

Cones

K 005 - K 010

K 015 - K 040 - K 080

K 125 ... K 340

Valve characteristics

Spindle 1,0mm - 0,039"

Valve spindle

Ø [mm] Ø ["]

1

2.5

4.5

0,039

0,98

0,177

Max. low rate Qv

Air

[l/h] [SCFH]

100

1000

4300

3,72

37,2

160


Valve characteristic

Kv Cv

[GPM]

[m

3

/h]

0.018

0.15

0.48

0,021

0,175

0,552


1 Flow, air

2 Flow, water

3 Spindle rotation n


27


7

TECHNICAL DATA

DK32

On - Off valve ®

INFORMATION!

Swagelok ® ball valves are designed to be used in a fully open or fully closed position.

Valves that have not been cycled for a period of time may have a higher initial actuation torque.

Packing adjustment may be required during the service life of the valve to prevent leakage.

1 on

2 off

Flow Data at 20 ° C (70 ° F)

Flow Coefficient (C v

)

0.90

Pressure Drop to Atmosphere ( Δ p), psi (bar)

10 (0.68) 50 (3.4) 100 (6.8)

10 (280)

Air Flow std ft3/min (std L/min)

27 (760) 48 (1300

INFORMATION!

For valves not actuated for a period of time, initial cracking pressure may be higher than the set cracking pressure.

Check valves are designed for directional flow control only. Swagelok check valves should never be used as code safety relief devices.

28

Figure 7-2: Flow Data at 20 ° C (70 ° F)

1 Inlet pressure

2 Air flow www.krohne.com



DK32 TECHNICAL DATA

7

7.5 Differential pressure regulators

Differential pressure regulators are used (DK32 and DK37 only) to help maintain constant flow rates in the case of fluctuating inlet or outlet pressures. Minimum pressure levels are required to permit operation of the regulators (see Regulator characteristics).

Differential pressure regulators are not pressure reducing valves!

1 Inlet pressure regulators, types RE, NRE

The regulators maintain a constant flow rate at variable inlet pressure and constant outlet pressure.

Example: Inlet pressure regulator RE-1000: Current flow rate:

Constant outlet pressure p2:

1000l/h air

1.013 bar abs.

With a variable inlet pressure greater than 0.5 bar the flow rate in the device is constant.

2 Outlet pressure regulators types RA, NRA

The regulators maintain a constant flow rate at constant inlet pressure and variable outlet pressure.

In order to function, there must be pressure difference between the inlet pressure and the outlet pressure. The inlet pressure p1 must always be greater than the outlet pressure p2.

Example: Outlet pressure regulator NRA-

800

Current flow rate: 800l/h air

Constant inlet pressure: 6 bar

With a variable outlet pressure of 0...5.5 bar the flowrate in the device remains constant.

Regulator characteristics

1 Inlet pressure regulators, types RE and

NRE

2 Outlet pressure regulators, types RA and

NRA


29


7

TECHNICAL DATA

DK32

Inlet pressure regulator

1

RE-1000

RE-4000

NRE-100

NRE-800

[l/h]

...40

...80

...100

-

-

...160

...2.5

...25

Water

[GPH]

...11

...20

...25

-

-

...42

...0.6

...6.60

Max. flowrate

[Nl/h]

...1000

...2000

… 3000

...4000

...100

… 250

… 800

-

Outlet pressure regulator

2

Max. flowrate

Water Air

[l/h] [GPH] [Nl/h] [SCFH]

RA-1000

RA-4000

NRA-800

...40

...100

-

-

-

...160

...1

...25

...11

...25

-

...42

...0.25

-

-

...6.6

...1000

…

...4000

...250

...500

… 800

-

2000

...3000

Table 7-1: * Pressure difference between inlet and outlet pressure

...37

...75

...110

...150

...9,0

...19

...30

-

Air

[SCFH]

...37

...75

...110

...150

...3,7

...9,0

...30

-

Min. inlet pressure p1 [bar]

2

0.1

0.1

0.2

0.4

0.5

1

1.5

p1 [psig]

7,25

14,5

21,8

29

1,45

1,45

2,9

5,8

Min. pressure diff. *

Δ p [bar]

0,4

1,2

1,2

1,5

0,05

0,1

0,2

0,4

Δ p [psig]

5,8

17,4

17,4

21,8

0,73

1,45

2,9

5,8

Technical data, differential pressure regulator

Standard connections

Option

Max. operating gauge pressure (at 20 ° C)

Medium temperature

Material

Gasket

Membrane

O-ring

1/4" NPT

Serto, Ermeto 6 or 8, tube nozzle 6mm or 8mm, Dilo,

Gyrolok, Swagelok, G 1/4

64 bar / 928psig

150 ° C / 302 ° F

CrNi-Steel 1.4404

PTFE

PTFE filled with carbon / graphite

FPM other connections and materials, higher temperatures and pressures on request

30 www.krohne.com



DK32 TECHNICAL DATA

7

Dimensions with differential pressure regulators

[mm] approx.

230 a b

["] [mm] ["] [mm] approx. 9,1 approx.163 approx. 6,4 70

DK32 with inlet pressure regulator c

["]

2,8

[mm]

23

DK32 with outlet pressure regulator d

["]

0,91


31


KROHNE product overview

• Electromagnetic flowmeters

• Variable area flowmeters

• Ultrasonic flowmeters

• Mass flowmeters

• Vortex flowmeters

• Flow controllers

• Level meters

• Temperature meters

• Pressure meters

• Analysis products

• Measuring systems for the oil and gas industry

• Measuring systems for sea-going tankers

Head Office KROHNE Messtechnik GmbH

Ludwig-Krohne-Str. 5

D-47058 Duisburg (Germany)

Tel.:+49 (0)203 301 0

Fax:+49 (0)203 301 10389 [email protected]

The current list of all KROHNE contacts and addresses can be found at: www.krohne.com

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