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Handbook
Handbook
DK32
DK32
DK32DK32
Panel mount purge set with DK32 flowmeter
HandbookHandbook
© KROHNE 04/2011 - 4000898801 MA DK32 Air purge set R02 en
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: IMPRINT :::::::::::::::::::::::::::::::::::::::
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.
Copyright 2011 by
KROHNE Messtechnik GmbH - Ludwig-Krohne-Str. 5 - 47058 Duisburg (Germany)
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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
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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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DK32
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.
SAFETY INSTRUCTIONS 1
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.
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1 SAFETY INSTRUCTIONS
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.
DK32
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
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.
SAFETY INSTRUCTIONS 1
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1 SAFETY INSTRUCTIONS
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.
DK32
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
HANDLING
HANDLINGHANDLING
This symbol designates all instructions for actions to be carried out by the operator in the
specified sequence.
i RESULT
RESULT
RESULTRESULT
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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DK32
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.
DEVICE DESCRIPTION 2
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)
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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
2.3 Nameplate DK32
INFORMATION!
Before installing the flowmeter, make sure that the information given on the nameplate
corresponds to the ordering data.
DEVICE DESCRIPTION 2
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)
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3 INSTALLATION
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!
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.
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.
DK32
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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DK32
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.
ELECTRICAL CONNECTIONS 4
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.
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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
Figure 4-1: Electrical connection of limit switches
5 - Lift slot
6 - Fastening screw of terminal box
Contact connection Cable colors of assembled cable
1 Min minus white
2 Min plus yellow
3 Max minus green
4 Max plus brown
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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
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.
DK32
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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DK32
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.
START-UP 5
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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6 SERVICE
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.
DK32
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
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
SERVICE 6
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
6.4.2 Form (for copying) to accompany a returned device
Company: Address:
Department: Name:
Tel. no.: Fax no.:
Manufacturer's order no. or serial no.:
The device has been operated with the following medium:
DK32
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.
Date: Signature:
Stamp:
6.5 Disposal
CAUTION!
Disposal must be carried out in accordance with legislation applicable in your country.
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DK32
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.
TECHNICAL DATA 7
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
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 Float position
Secondary measured value Operating and standard volumetric flow
DK32
Measuring accuracy
Directive VDI / VDE Code 3513 Sheet 2 (qG =50%)
DK32 4.0%
Operating conditions
Max. operating temperature TS -40..+150°C / -112...+302°F
Operating pressure PS Pressure Equipment Directive 97/23/EC
Test pressure PT Pressure Equipment Directive 97/23/EC and AD 2000-HP30
Max. allowable operating pressure PS 130 bar standard 1
Installation conditions
Inlet / outlet run non
Weights
DK32 0.7 kg (1.54 lb)
DK32 with differential pressure
regulator
complete purge set 3.5 kg (7.72 lb)
complete with differential pressure
regulator
2.5 kg (5.51 lb)
5.3 kg (11.7 lb)
22
Connection
Inlet - Outlet NPT ½" female
Check valve
Max. flow-coefficient 0.47
Nom. cracking pressure 0.03bar (1/3 psi)
Downstream pressure at 20°C (70°F) 68.9bar (1000psig)
1 higher pressures on request
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DK32
TECHNICAL DATA 7
Materials
DK32 Head piece, foot piece, cone CrNi steel 1.4404 / 316 L
upper plug CrNi steel 1.4404 / 316 L
Standard float CrNi steel 1.4404 / 316 L or titanium
Metering unit CrNi steel 1.4571 / 316 Ti
Valve spindle CrNi steel 1.4404 / 316 L
Valve plug gasket FPM 1
Metering unit gasket FPM and PTFE 1
Indicator IP65 GD-Al / aluminium diecast (powder coated)
Purge set Tube fittings CrNi steel 1.4401 / 316
Threaded connection CrNi steel 1.4401 / 316
Mounting plate CrNi steel 1.4301 / 304
Tube CrNi steel 1.4404 / 316L
U-bolt pipe hanger CrNi steel 1.4571 / 316Ti
On off ball valve
Swagelok®
SS-43GF4
Poppet check valve
Swagelok®
SS-4C4-1/3
1 other gasket materials on request
Body CrNi steel 1.4401 / 316
Packing Modified PTFE/D1710 type 1, Grade 1, Class B
or UHMWPE/D4020
Body CrNi steel 1.4401 / 316
Gasket PTFE coated CrNi steel 1.4401 / 316
O-ring FKM fluorocarbon
Temperatures
Max. process temperature at T
DK32 with valve -40...+150 -40...+302
DK32 with limit switches -25/-40...+145 -13/-40...+293
Max. ambient temperature T
amb.
< 40°C / 104°F
amb.
[°C] [°F]
-25...+70 -13...+158
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7 TECHNICAL DATA
DK32 - Indicator with limit switches
Cable fitting DK32/Kx/S M16 x 1,5
Cable diameter DK32/Kx/L 7 ... 8mm
Clamp connection DK32/Kx/S
Limit switch SC2-N0
Type 2-wire NAMUR 2-wire NAMUR 2-wire NAMUR
Switch element function Normally closed Normally closed Normally open
Nominal voltage U
Pointer shaft not read ≥3mA ≥3mA ≤1mA
Pointer shaft read ≤1mA ≤1mA ≥3mA
DK32 with reed contact Switching type bistable
1 safety oriented
2 reduced values for Ex version
0
2
1.5mm
I7S2002-N
8VDC 8VDC 8VDC
Switching reproducibility <5% of full scale value
Breaking capacity 12VA 2
Max. supply voltage 30VDC 2
Max. current 0,5A 2
SJ2-SN 1 SJ2-S1N 1
DK32
Approvals
Standard Indicator Designation
ATEX DK32 mechanical II2GD IIC
DK32 electrical II2G Ex ia IIC T6
IEC Ex DK32 electrical Ex ia IIC T6
FM DK32 IS/I/1/ABCD;T6
Nepsi DK32 Ex nL IIC T1-T6
II3GD IIC
NI/I/2/ABCD;T6
S/II, III/2/FG;T6
IS/I, II, III/1/A-G
NI/II/2/ABCD
Ex nA II T1-T6
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DK32
7.3 Dimensions
dimensions a b c d e f g
[mm] 363 122 180 188 303 max. 195 54
["] 14.3 4.8 7.1 7.4 11.9 max. 7.7 2.1
TECHNICAL DATA 7
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7 TECHNICAL DATA
7.4 Flow table DK32
Measuring span: 10 : 1
Declaration of flow: Values = 100%
Cones [l/h] [SCFH] [mbar] [psig]
K 005 16 1 0.6 1 14 0.21
K 005 50 1.9 31 0.46
K 010 70 1 2.6 1 66 0.97
K 010 100 3.7 66 0.97
K 015 150 5.6 19 0.28
K 040 400 15 27 0.40
K 080 800 30 55 0.81
K 125 1250 45 42 0.62
K 200 2000 75 85 1.25
K 300 2500 90 117 1.72
K 340 3400 130 166 2.44
1 with titanium float
DK32
Air: 20°C [68°F], 1,2 bar abs. [17.4 psia]
Air flow rate Pressure drop
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
Reference condition for gas measurements:
Reference condition for gas measurements:
Reference condition for gas measurements:Reference condition for gas measurements:
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: 10 : 1
Declaration of flow: Values = 100%
Air: 20°C [68°F], 1,2 bar abs. [17.4 psia]
Max. low rate Qv Valve characteristic
Valve spindle Air Kv Cv
Cones Ø [mm] Ø ["] [l/h] [SCFH]
K 005 - K 010 1 0,039 100 3,72 0.018 0,021
K 015 - K 040 - K 080 2.5 0,98 1000 37,2 0.15 0,175
K 125 ... K 340 4.5 0,177 4300 160 0.48 0,552
[m3/h]
[GPM]
Valve characteristics
Spindle 1,0mm - 0,039" Spindle 2,5mm - 0,098"
Spindle 4,5mm - 0,177"
1 Flow, air
2 Flow, water
3 Spindle rotation n
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7 TECHNICAL DATA
On - Off valve
On - Off valve Swagelok®
On - Off valveOn - Off valve
INFORMATION!
Swagelok
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
®
ball valves are designed to be used in a fully open or fully closed position.
DK32
Flow Data at 20°C (70°F)
Flow Coefficient (Cv) Pressure Drop to Atmosphere (Δp), psi (bar)
10 (0.68) 50 (3.4) 100 (6.8)
Air Flow std ft3/min (std L/min)
0.90 10 (280) 27 (760) 48 (1300
Check valve
Check valve
Check valveCheck valve
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.
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Figure 7-2: Flow Data at 20°C (70°F)
1 Inlet pressure
2 Air flow
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DK32
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: 1000l/h air
With a variable inlet pressure greater than 0.5 bar the flow rate in the device is constant.
TECHNICAL DATA 7
Constant outlet pressure
p2:
1.013 bar abs.
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 NRA800
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
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7 TECHNICAL DATA
Inlet pressure regulator 1
[l/h] [GPH] [Nl/h] [SCFH] p1 [bar] p1 [psig]
RE-1000 ...40 ...11 ...1000 ...37 0.5 7,25
RE-4000 ...80 ...20 ...2000 ...75 1 14,5
...100 ...25 …3000 ...110 1.5 21,8
...160 ...42 ...4000 ...150 2 29
NRE-100 ...2.5 ...0.6 ...100 ...3,7 0.1 1,45
NRE-800 - - …250 ...9,0 0.1 1,45
- - …800 ...30 0.2 2,9
...25 ...6.60 - - 0.4 5,8
Outlet pressure regulator 2
DK32
Max. flowrate
Water Air Min. inlet pressure
Max. flowrate
Water Air Min. pressure diff. *
[l/h] [GPH] [Nl/h] [SCFH] Δp [bar] Δp [psig]
RA-1000 ...40 ...11 ...1000 ...37 0,4 5,8
RA-4000 ...100 ...25 …2000 ...75 1,2 17,4
- - ...3000 ...110 1,2 17,4
...160 ...42 ...4000 ...150 1,5 21,8
NRA-800 ...1 ...0.25 ...250 ...9,0 0,05 0,73
- - ...500 ...19 0,1 1,45
- - …800 ...30 0,2 2,9
...25 ...6.6 - - 0,4 5,8
Table 7-1: * Pressure difference between inlet and outlet pressure
Technical data, differential pressure regulator
Standard connections 1/4" NPT
Option Serto, Ermeto 6 or 8, tube nozzle 6mm or 8mm, Dilo,
Gyrolok, Swagelok, G 1/4
Max. operating gauge pressure (at 20°C) 64 bar / 928psig
Medium temperature 150°C / 302°F
Material CrNi-Steel 1.4404
Gasket PTFE
Membrane PTFE filled with carbon / graphite
O-ring FPM
other connections and materials, higher temperatures and pressures on request
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DK32
TECHNICAL DATA 7
Dimensions with differential pressure regulators
a b c d
[mm] ["] [mm] ["] [mm] ["] [mm] ["]
approx.
230
approx. 9,1 approx.163 approx. 6,4 70 2,8 23 0,91
DK32 with inlet pressure regulator DK32 with outlet pressure regulator
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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
info@krohne.de
© KROHNE 04/2011 - 4000898801 MA DK32 Air purge set R02 en - Subject to change without notice.
The current list of all KROHNE contacts and addresses can be found at:
www.krohne.com
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