DK32 - DK34 - DK37 - webadmin1.net

DK32 - DK34 - DK37 HandbookVariable area flowmeter© KROHNE 07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37CONTENTS1 Safety instructions 51.1 Intended use ..................................................................................................................... 51.2 Certifications .................................................................................................................... 51.3 Safety instructions from the manufacturer ..................................................................... 61.3.1 Copyright and data protection ................................................................................................ 61.3.2 Disclaimer ............................................................................................................................... 61.3.3 Product liability and warranty ................................................................................................ 71.3.4 Information concerning the documentation........................................................................... 71.3.5 Warnings and symbols used................................................................................................... 81.4 Safety instructions for the operator................................................................................. 82 Device description 92.1 Scope of supply................................................................................................................. 92.2 Device versions............................................................................................................... 102.3 Nameplate ...................................................................................................................... 112.4 Description code............................................................................................................. 123 Installation 133.1 Notes on installation ......................................................................................................133.2 Storage ........................................................................................................................... 133.3 Installation requirements .............................................................................................. 134 Electrical connections 144.1 Safety instructions.......................................................................................................... 144.2 Electrical connection of limit switches .......................................................................... 154.3 Setting the limit switch for DK32 DK34.......................................................................... 164.4 DK37/M8M limit switches............................................................................................... 174.5 DK37/M8E electrical signal output ................................................................................ 184.5.1 Power supply......................................................................................................................... 194.5.2 Load for HART ® communication .......................................................................................... 194.5.3 Parametrization .................................................................................................................... 194.6 Ground connections........................................................................................................ 204.7 Protection category ........................................................................................................215 Start-up 225.1 Standard device .............................................................................................................. 226 Service 236.1 Maintenance ................................................................................................................... 236.2 Spare parts availability...................................................................................................246.3 Availability of services .................................................................................................... 246.4 Returning the device to the manufacturer..................................................................... 2407/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com3

DK32 - DK34 - DK37SAFETY INSTRUCTIONS 11.1 Intended useThe variable area flowmeters manufactured by KROHNE Messtechnik GmbH & Co. KG aresuitable 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 gasesDANGER!In case of instruments which are used in explosive endangered areas please consider thesupplementary installation and operating instructions mentioned in the Ex-manual.WARNING!The operator shall bear sole responsibility for the use of the flowmeters with regard tosuitability, 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 forother than the intended purpose.Do not use any abrasive or highly viscous process products.1.2 CertificationsCE markingThe 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-areasAnd also• NAMUR Recommendations NE 21 and NE 43 (DK37/M8E)KROHNE Messtechnik GmbH & Co. KG certifies successful testing of the product by applying theCE mark.07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com5

1 SAFETY INSTRUCTIONSDK32 - DK34 - DK371.3 Safety instructions from the manufacturer1.3.1 Copyright and data protection1.3.2 DisclaimerThe contents of this document have been created with great care. Nevertheless, we provide noguarantee that the contents are correct, complete or up-to-date.The contents and works in this document are subject to German copyright. Contributions fromthird parties are identified as such. Reproduction, processing, dissemination and any type of usebeyond what is permitted under copyright requires written authorisation from the respectiveauthor and/or the manufacturer.The manufacturer tries always to observe the copyrights of others, and to draw on works createdin-house or works in the public domain.The collection of personal data (such as names, street addresses or e-mail addresses) in themanufacturer's documents is always on a voluntary basis whenever possible. Wheneverfeasible, it is always possible to make use of the offerings and services without providing anypersonal data.We draw your attention to the fact that data transmission over the Internet (e.g. whencommunicating by e-mail) may involve gaps in security. It is not possible to protect such datacompletely against access by third parties.We hereby expressly prohibit the use of the contact data published as part of our duty to publishan imprint for the purpose of sending us any advertising or informational materials that we havenot expressly requested.The manufacturer will not be liable for any damage of any kind by using its product, including,but not limited to direct, indirect, incidental, punitive and consequential damages.This disclaimer does not apply in case the manufacturer has acted on purpose or with grossnegligence. In the event any applicable law does not allow such limitations on implied warrantiesor the exclusion of limitation of certain damages, you may, if such law applies to you, not besubject to some or all of the above disclaimer, exclusions or limitations.Any product purchased from the manufacturer is warranted in accordance with the relevantproduct documentation and our Terms and Conditions of Sale.The manufacturer reserves the right to alter the content of its documents, including thisdisclaimer in any way, at any time, for any reason, without prior notification, and will not be liablein any way for possible consequences of such changes.6www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37SAFETY INSTRUCTIONS 11.3.3 Product liability and warrantyThe 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. Improperinstallation and operation of the devices (systems) will cause the warranty to be void. Therespective "Standard Terms and Conditions" which form the basis for the sales contract shallalso apply.1.3.4 Information concerning the documentationTo prevent any injury to the user or damage to the device it is essential that you read theinformation in this document and observe applicable national standards, safety requirementsand accident prevention regulations.If this document is not in your native language and if you have any problems understanding thetext, we advise you to contact your local office for assistance. The manufacturer can not acceptresponsibility for any damage or injury caused by misunderstanding of the information in thisdocument.This document is provided to help you establish operating conditions, which will permit safe andefficient use of this device. Special considerations and precautions are also described in thedocument, which appear in the form of underneath icons.07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com7

1 SAFETY INSTRUCTIONSDK32 - DK34 - DK371.3.5 Warnings and symbols usedSafety 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 toserious health problems and even death. There is also the risk of seriously damaging the deviceor 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'splant.INFORMATION!These instructions contain important information for the handling of the device.LEGAL NOTICE!This note contains information on statutory directives and standards.• HANDLINGThis symbol designates all instructions for actions to be carried out by the operator in thespecified sequence.iRESULTThis symbol refers to all important consequences of the previous actions.1.4 Safety instructions for the operatorWARNING!In general, devices from the manufacturer may only be installed, commissioned, operated andmaintained by properly trained and authorized personnel.This document is provided to help you establish operating conditions, which will permit safe andefficient use of this device.8www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37DEVICE DESCRIPTION 22.1 Scope of supplyINFORMATION!Inspect the cartons carefully for damage or signs of rough handling. Report damage to thecarrier 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 supply1 Flowmeter in the version ordered2 Manual3 Certificates, calibration certificate (supplied to order only)07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com9

2 DEVICE DESCRIPTIONDK32 - DK34 - DK372.2 Device versions• DK32 with valve and horizontal connection• DK34 without valve and vertical connection• DK37 with valve and horizontal connectionThe following designs are available as options:• with inlet pressure regulator• with outlet pressure regulatorDevice versions1 DK32 with valve - with horizontal connection2 DK34 without valve - with vertical connection3 DK37/M8E with valve and electronic display4 DK37/M8M with valve and mechanical displayVersions with regulator1 DK32 with inlet pressure regulator2 DK37 with inlet pressure regulator10www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37DEVICE DESCRIPTION 22.3 NameplateINFORMATION!Before installing the flowmeter, make sure that the information given on the nameplatecorresponds to the ordering data.Figure 2-2: Nameplates1 Type of meter2 Manufacturer3 Appointed ATEX & DGRL body4 Design data: temperature & pressure rating5 DGRL data6 Ex data7 Electrical connection data8 Pay regard to manual9 KROHNE websiteAdditional markings on the flowmeter:• SO - sales order / item• KO - KROHNE order• Vx - product configurator code• AC - article code07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com11

2 DEVICE DESCRIPTIONDK32 - DK34 - DK372.4 Description codeDescription code DK32 DK34The description code consists of the following elements*:1 32 - mit Ventil und horizontalem Anschluss / 34 ohne Ventil und vertikalem Anschluss2 RE - Vordruckregler / RA - Nachdruckregler3 K1 - ein Grenzwertgeber / K2 - zwei Grenzwertgeber4 S - Anschlussstecker / L - Leitungseinführung inkl. Kabel5 HT - Hochtemperaturausführung6 A - Grenzwertgeber EG baumustergeprüft bzw. IECEx geprüft7 Ex - Explosionsgeschütztes Betriebsmittel8 SK - SIL2 Konformität der Grenzwertgeber nach IEC 61508* positions which are not needed are omitted (no blank positions)Description code DK37The description code* consists of the following elements:1 M8M - Mechanical display / M8E - Electronic display and signal output 4...20mA2 RE - Inlet pressure regulator / RA - Outlet pressure regulator3 K1 - one limit switch / K2 - two limit switches4 Ex is not part of the designation key5 SK - SIL2 compliance of limit switches acc. to IEC 61508SE - SIL1 compliance of current output acc. to IEC 61508* positions which are not needed are omitted (no blank positions)12www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37INSTALLATION 33.1 Notes on installationINFORMATION!Inspect the cartons carefully for damage or signs of rough handling. Report damage to thecarrier 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.3.3 Installation requirementsCAUTION!When installing the flowmeter in the piping please observe the following points:• The variable area flowmeter must be installed vertically (measuring principle). The flowdirection must be from bottom to top. For installation recommendations please refer also toVDI/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 theflowmeter.• 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 isrequired (see Technical Data).07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com13

4 ELECTRICAL CONNECTIONSDK32 - DK34 - DK374.1 Safety instructionsDANGER!All work on the electrical connections may only be carried out with the power disconnected. Takenote 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 Exdocumentation.WARNING!Observe without fail the local occupational health and safety regulations. Any work done on theelectrical components of the measuring device may only be carried out by properly trainedspecialists.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.14www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37ELECTRICAL CONNECTIONS 44.2 Electrical connection of limit switchesThe 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 1 of the connector plug• Pull out the plug• Remove screw 1 completely from the plug• Insert a screwdriver in the marked opening 2 (Lift) and remove the terminal block.• Thread the connecting cable through the cable gland.• Insert the cable (max. 1.5mm 2 ) and screw down.Figure 4-1: Electrical connection of limit switches5 - Lift slot6 - Fastening screw of terminal boxContact connectionCable colors of assembled cable3 Min minus white4 Max plus brown5 Min plus yellow6 Max minus green07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com15

4 ELECTRICAL CONNECTIONSDK32 - DK34 - DK37Connection three-wire reed contactFigure 4-2: Electrical connection of reed contact limit switchStrand colours for flowmeters with preassembled cables:1 Silicone-insulated wire - yellow/green / FEP-insulated wire - red2 Silicone-insulated wire - brown / FEP-insulated wire - brown3 Silicone-insulated wire - blue / FEP-insulated wire - blue4.3 Setting the limit switch for DK32 DK34Set the pointers to the desired limit values as a min. contact 1 and max. contact 2 using a slipcoupling along the scale.Figure 4-3: Limit switch settingsAdjusting the limit switch with reed contact:• Slacken nut 3• Set reed cartridge to the required value• Secure with nut 3CommentThe reed contact is actuated directly by the float magnet. The desired operating point can only bedetermined in measuring mode. A reference to the scale and/or pointer cannot be established.16www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37ELECTRICAL CONNECTIONS 44.4 DK37/M8M limit switchesThe limit switches can be set over the entire measuring range using the maximum pointer. Theset limit values are displayed on the scale. The pointers are set to the desired limit values usinga slip coupling along the scale.Figure 4-4: Limit switch setting1 Maximum pointer, switching point indicator2 Limit switch3 Connection board4 Connection terminal07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com17

4 ELECTRICAL CONNECTIONSDK32 - DK34 - DK374.5 DK37/M8E electrical signal outputFigure 4-5: Electrical connection M8E1 Terminal connection2 Auxiliary power 14.8...30VDC3 Measurement signal 4...20mA4 External load, HART TM communicationThe circuitry for connection to other devices such as digital evaluator units or process controlequipment must be designed with especial care. In some circumstances internal connections inthese devices (e.g. GND with PE, ground loops) may lead to impermissible voltage potentials,which can compromise the function of the device itself or a connected device. In such cases aprotected extra-low voltage (PELV) is recommended.Figure 4-6: Electrical connection with galvanic isolation1 Terminal connection2 Converter supply isolator with galvanic isolation3 Auxiliary power (see supply isolator information)4 Measurement signal 4...20mA5 External load, HART TM communication18www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37ELECTRICAL CONNECTIONS 44.5.1 Power supplyINFORMATION!The supply voltage has to be between 14.8VDC and 30VDC. This is based on the total resistanceof the measuring loop. To determine this, add up the resistances of each component in themeasuring loop (not including the meter).The required supply voltage can be calculated using the formula below:U ext. = R L * 22mA + 14.8VwhereU ext. = the minimum supply voltage andR L = the total measuring loop resistance.INFORMATION!The power supply has to be able to supply a minimum of 22mA.4.5.2 Load for HART ® communicationINFORMATION!For HART ® communication a load of at least 230 ohm is required.The maximum load impedance is calculated as follows:DANGER!Use a twisted two-core cable to prevent electrical interference from impeding the DC outputsignal.In some cases a shielded cable may be necessary. The cable shield may only be earthed(grounded) at one place (on the power supply unit).4.5.3 ParametrizationThe M8E electronic display can be parametrized via HART ® communications. DD (DeviceDescriptions) for AMS 6.x and PDM 5.2 and a DTM (Device Type Manager) are available forparametrization (download center).The current flowrate can be transmitted using the integral HART ® communications. A flowcounter can be parametrized. Two limit values can be monitored. The limit values are assignedeither to flow values or to the counter overflow. The limit values are not depicted on the display.07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com19

4 ELECTRICAL CONNECTIONSDK32 - DK34 - DK374.6 Ground connectionsThe earthing can be done on the head piece of the measuring section (M4 threaded hole)Figure 4-7: Ground connections1 Earth connection on the measuring sectionDANGER!The earth conductor must not transfer any interference voltage.Do not use this earth conductor to ground any other items of electrical equipment.20www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37ELECTRICAL CONNECTIONS 44.7 Protection categoryThe flowmeter meets all requirements of protection category IP 65.DANGER!After all servicing and maintenance work on the flowmeter, the specified protection category hasto 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 haveto 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 fromgetting into the housing.• The cable glands 2 have to be firmly tightened.• Close the unused cable glands using blanking plugs 1.• Do not remove the specified outer sheath from the cable gland.Figure 4-8: Cable gland1 Close the unused cable glands using blanking plugs.2 The cable glands have to be firmly tightened.3 The cable has to be laid with a loop.07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com21

5 START-UPDK32 - DK34 - DK375.1 Standard deviceCAUTION!When starting up the device, the following points must be observed:• Compare the actual operating pressure and the product temperature of the system with thespecifications on the nameplate (PS and TS). These specifications may not be exceeded.• Make sure materials are compatible.• Slowly open the shut-off valve.• When measuring liquids, vent the pipes carefully.• When measuring gases, increase pressure slowly.• Avoid float impact (e.g. caused by solenoid valves), as this is likely to damage the measuringunit or float.22www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37SERVICE 66.1 MaintenanceWithin the scope of routine maintenance of the system and pipelines, the flowmeter should alsobe inspected for signs of fouling, corrosion, mechanical wear and leaks, as well as damage tothe 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, appropriatesafety 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 servicelife. This means that the union nut has to be retightened. If necessary, press the retaining pinagainst 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 initialactuation torque.07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com23

6 SERVICEDK32 - DK34 - DK376.2 Spare parts availabilityThe manufacturer adheres to the basic principle that functionally adequate spare parts for eachdevice or each important accessory part will be kept available for a period of 3 years afterdelivery of the last production run for the device.This regulation only applies to spare parts which are under normal operating conditions subjectsto wear and tear.6.3 Availability of servicesThe manufacturer offers a range of services to support the customer after expiration of thewarranty. These include repair, technical support and training.INFORMATION!For more precise information, please contact your local representative.INFORMATION!Before calling the customer support, please collect the information which are listed in thesupport information form (see appendix) and have it at hand.6.4 Returning the device to the manufacturer6.4.1 General informationThis device has been carefully manufactured and tested. If installed and operated in accordancewith these operating instructions, it will rarely present any problems.CAUTION!Should you nevertheless need to return a device for inspection or repair, please pay strictattention to the following points:• Due to statutory regulations on environmental protection and safeguarding the health andsafety of our personnel, manufacturer may only handle, test and repair returned devices thathave 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 thefollowing 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 fromsuch dangerous substances,• to enclose a certificate with the device confirming that is safe to handle and stating theproduct used.24www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37SERVICE 66.4.2 Form (for copying) to accompany a returned deviceCompany:Address:Department:Name:Tel. no.:Fax no.:Manufacturer's order no. or serial no.:The device has been operated with the following medium:This medium is:water-hazardoustoxiccausticflammableWe checked that all cavities in the device are free from suchsubstances.We have flushed out and neutralized all cavities in thedevice.We hereby confirm that there is no risk to persons or the environment through any residual mediacontained in the device when it is returned.Date:Signature:Stamp:6.5 DisposalCAUTION!Disposal must be carried out in accordance with legislation applicable in your country.07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com25

7 TECHNICAL DATADK32 - DK34 - DK377.1 Operating principleThe 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 Gare in equilibrium: G = A + W.Figure 7-1: Operating principleFor the DK32, DK34 and DK37/M8M 1 the flow-dependent height of the float in the measuringsection 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 istransmitted to the electronic display by means of a magnetic coupling on sensors S1 and S2.26www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37TECHNICAL DATA 77.2 Technical dataINFORMATION!• The following data is provided for general applications. If you require data that is morerelevant to your specific application, please contact us or your local representative.• Additional information (certificates, special tools, software,...) and complete productdocumentation can be downloaded free of charge from the website (Download Center).Measuring systemApplication rangeOperating method / measuring principleMeasured valuePrimary measured valueSecondary measured valueFlow measurement of liquids, gases and vaporsFloat measuring principleFloat positionOperating and standard volumetric flowMeasuring accuracyDirective VDI / VDE Code 3513 Sheet 2 (q G =50%)DK32 DK34 4.0%DK37 2.5%Operating conditionsMax. operating temperature TSOperating pressure PSTest pressure PT-80..+200°C / -112...+392°FPressure Equipment Directive 97/23/ECPressure Equipment Directive 97/23/EC and AD 2000-HP30Max. allowable operating pressure PS 130 bar standard 1Installation conditionsInlet / outlet run1 higher pressures on requestnonMaterialsHead piece, foot piece, coneCrNi steel 1.4404 / 316 Lupper plugCrNi steel 1.4404 / 316 LStandard floatCrNi steel 1.4404 / 316 L or titaniumMetering unitCrNi steel 1.4571 / 316 TiValve spindleCrNi steel 1.4404 / 316 LValve plug gasket FPM 1Metering unit gasket FPM and PTFE 11 other gasket materials on request07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com27

7 TECHNICAL DATADK32 - DK34 - DK37TemperaturesMax. process temperature at T amb. < 40°C / 104°F[°C][°F]DK32 with valve -40...+150 1 -40...+302 1DK34 without valve -80...+150 1 -112...+302 1DK32 DK34 with limit switches -25/-40...+145 -13/-40...+293DK37M8M without valve -80...+150 1 -112...+302 1DK37M8M with valve -40...+150 1 -40...+302 1DK37/M8M with limit switches -25/-40...+150 13/-40...+302DK37M8E with electronical indicator -25...+135 -13...+275Max. ambient temperature T amb. -25...+70 -13...+1581 High temperature version up to 200°C / 392°FIndicators of DK32 DK34 DK37/M8M with limit switchesCable fitting DK3x/Kx/S M16 x 1,5Cable diameter DKx/Kx/LIndicator DK37/M8E7 ... 8mmClamp connection DK3x/Kx/S 1.5mm 2Limit switchSC2-N0SJ2-SN 1 SJ2-S1N 1I7S2002-NType 2-wire NAMUR 2-wire NAMUR 2-wire NAMURSwitch element function Normally closed Normally closed Normally openNominal voltage U 0 8VDC 8VDC 8VDCPointer shaft not read ≥3mA ≥3mA ≤1mAPointer shaft read ≤1mA ≤1mA ≥3mADK32 DK34 with reed contact Switching type bistableSwitching reproducibility

DK32 - DK34 - DK37TECHNICAL DATA 7External resistance dependency 21.60Maximum 112.5 22Multi-drop operation - 4.5Min. U ext.12VDCApprovalsStandard Indicator DesignationATEX DK32 DK34 mechanical II2GD IICII3GD IICDK32 DK34 electrical II2G Ex ia IIC T6DK37 mechanical II2GD IICII3GD IICDK37 electricalII2G Ex ia IIC T6IEC Ex DK32 DK34 electrical Ex ia IIC T6FM DK32 DK34 IS/I/1/ABCD;T6NI/I/2/ABCD;T6S/II, III/2/FG;T6IS/I, II, III/1/A-GNI/II/2/ABCDNepsi DK32 DK34 Ex nL IIC T1-T6Ex nA II T1-T6DK37Ex ia IIC T1-T607/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com29

7 TECHNICAL DATADK32 - DK34 - DK377.3 DimensionsDimensions, DK32 DK34a b c dDevice [mm] ["] [mm] ["] [mm] ["] [mm] ["]1 DK32 with valve andhorizontal processconnections2 DK34 without valveand vertical processconnections3 DK32 DK34 withlimit switches K1/K24 DK32 with flangeconnections42 1,66 118 4,65 90 3,55 100 3,9442 1,66 110 4,33 - - 75 3,0746 1,81 approx.90ca. 3,55 1500 50,1 approx.50- - 250 10,2 90 3,55 approx.195ca. 1,97ca. 7,68DK32 DK32 DK34 DK34DK32 (DK34) with K1/K2 DK32 (DK34) with K1/K2 DK32 with flange connections30www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37TECHNICAL DATA 7DK37 dimensionsa b c d approx.Device [ mm] ["] [ mm] ["] [ mm] ["] [ mm] ["]1 DK37/M8E withvalve and horizontalprocess connections2 DK37/M8E withvalve on top3 DK37/M8M/K . withvalve and horizontalprocess connections4 DK37/M8M/K .without valve andvertical processconnections5 DK37/M8E withoutvalve and verticalprocess connections56 2,21 153 6,03 125 4,92 144 ca. 5,6756 2,21 183 7,21 155 6,11 144 ca. 5,6756 2,21 153 6,03 125 4,92 156 ca. 6,1556 2,21 145 5,71 145 5,71 140 ca. 5,5256 2,21 145 5,71 145 5,71 121 ca. 4,77DK37/M8M with valve DK37/M8E with valve DK37/M8E with valve on topDK37/M8M with K1/K2DK37/M8M without valve andvertical connectionsDK37/M8E without valve andvertical connections07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com31

7 TECHNICAL DATADK32 - DK34 - DK37Min. installation distanceIf several instruments are installed side by side, a minimum distance betwween theseinstruments is required.Min. distanceDevice [mm] ["]1 DK32 / DK34 60 2,362 DK37/M8M 100 3,942 DK37/M8E 120 4,73WeightsApprox. weights [g] ca. [lbs]DK32 700 1,54DK34 600 1,32DK37/M8M 800 1,76DK37/M8E 1000 2,21DK32 with differential pressure regulators 2500 5,51DK37/M8E with differential pressure regulators 2800 6,18DK37/M8M with differential pressure regulators 2600 5,73ConnectionsStandard 1/4" NPT inside threadG 1/4, Ermeto, Serto, Dilo, Gyrolok, Swagelok, flanges 11 other connections on request32www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37TECHNICAL DATA 77.4 Flow tableMeasuring span 10 : 1Flow values 100%Reference condition:Water 20°C / 68°FAir 20°C / 68°F - 1.013 bar abs. / 14,7 psiOther flow ranges on requestWater flow rate Air flow rate Pressure dropCones [l/h] [gph] [l/h] [scfh] [mbar] [psig]K 005 - - 16 1 0.6 1 14 0.21K 005 - - 50 1.9 31 0.46K 010 1.5 1 0.40 1 70 1 2.6 1 66 0.97K 010 3 0.8 100 3.7 66 0.97K 015 5 1.3 150 5.6 19 0.28K 040 10 2.5 400 15 27 0.40K 080 25 6.5 800 30 55 0.81K 125 40 11 1250 45 42 0.62K 200 60 16 2000 75 85 1.25K 300 80 20 2500 90 117 1.72K 340 100 25 3400 130 166 2.441 with titanium floatConversion for other materials or operating data (pressure, temperature, density, viscosity) isperformed at KROHNE using the calculation method in accordance with VDI /VDE Directive 351307/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com33

7 TECHNICAL DATADK32 - DK34 - DK37Valves (only DK32 and DK37)Max. low rate QvValvecharacteristicValve spindle Water Air Kv CvCones Ø [mm] Ø ["] [l/h] [gph] [l/h] [scfh] [m 3 /h] [gpm]K 005 - K 010 1 0,039 5 1,32 100 3,72 0.018 0,021K 015 - K 040 - K 080 2.5 0,98 50 13,2 1000 37,2 0.15 0,175K 125 ... K 340 4.5 0,177 160 42,3 4300 160 0.48 0,552Valve characteristicsSpindle 1,0mm - 0,039" Spindle 2,5mm - 0,098"Spindle 4,5mm - 0,177"1 Flow, air2 Flow, water3 Spindle rotation n34www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37TECHNICAL DATA 77.5 Differential pressure regulatorsDifferential pressure regulators are used (DK32 and DK37 only) to help maintain constant flowrates in the case of fluctuating inlet or outlet pressures. Minimum pressure levels are requiredto permit operation of the regulators (see Regulator characteristics).Differential pressure regulators are not pressure reducing valves!1 Inlet pressure regulators, types RE, NREThe regulators maintain a constant flow rate at variable inlet pressure and constant outletpressure.Example: Inlet pressure regulator RE-1000: Current flow rate: 1000l/h airConstant outlet pressure 1.013 bar abs.p2:With a variable inlet pressure greater than 0.5 bar the flow rate in the device is constant.2 Outlet pressure regulators types RA, NRAThe regulators maintain a constant flow rate at constant inlet pressure and variable outletpressure.In order to function, there must be pressure difference between the inlet pressure andthe outlet pressure. The inlet pressure p1 must always be greater than the outlet pressure p2.Example: Outlet pressure regulator NRA- Current flow rate:800l/h air800Constant inlet pressure: 6 barWith a variable outlet pressure of 0...5.5 bar the flowrate in the device remains constant.Regulator characteristics1 Inlet pressure regulators, types RE andNRE2 Outlet pressure regulators, types RA andNRA07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com35

7 TECHNICAL DATADK32 - DK34 - DK37Control range inlet pressure regulator 1Max. flowrateWater Air Min. inlet pressure[l/h] [gph] [l/h] [scfh] Δ p1 [bar] Δ p1 [psig]RE-1000 ...40 ...11 ...1000 ...37 0.5 0.007RE-4000 ...80 ...20 ...2000 ...75 1 0.015...100 ...25 …3000 ...110 1.5 0.022...160 ...42 ...4000 ...150 2 0.029NRE-100 ...2.5 ...0.6 ...100 ...3,7 0.1 0.001NRE-800 - - …250 ...9,0 0.1 0.001- - …800 ...30 0.2 0.003...25 ...6.60 - - 0.4 0.006Control ranges outlet pressure regulator 2Max. flowrateWater Air Min. pressure diff.[l/h] [gph] [l/h] [scfh] [bar] [psig]RA-1000 ...40 ...11 ...1000 ...37 0.5 0.007RA-4000 ...100 ...25 …2000 ...75 1 0.015- - ...3000 ...110 1.5 0.022...160 ...42 ...4000 ...150 2 0.029NRA-800 ...1 ...0.25 ...250 ...9,0 0.1 0.001- - ...500 ...19 0.2 0.003- - …800 ...30 0.2 0.003...25 ...6.6 - - 0.4 0.006Technical data, differential pressure regulatorStandard connections1/4" NPTOptionSerto, Ermeto 6 or 8, tube nozzle 6mm or 8mm, Dilo,Gyrolok, Swagelok, G 1/4 1Max. operating gauge pressure (at 20°C) 64 bar / 928psig 2Medium temperature 150°C / 302°F 3Material CrNi-Steel 1.4404Gasket PTFE 4MembranePTFE filled with carbon / graphiteO-ring FPM 41 other connections upon request2 higher pressures upon request3 higher temperatures upon request4 other materials on request36www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37TECHNICAL DATA 7Dimensions with differential pressure regulatorsa b c d[mm] ["] [mm] ["] [mm] ["] [mm] ["]DK32approx.230approx.9,1approx.163approx.6,470 2,8 23 0,91DK37approx.230approx.9,1approx.200approx.7,970 2,8 23 0,91DK37/M8M 1approx.230approx.9,1approx.230approx.9,170 2,8 23 0,911 with outlet pressure regulatorDK32 with inlet pressure regulatorDK37/M8E and M8M with inlet pressureregulatorDK32 with outlet pressure regulatorDK37/M8E with outlet pressure regulator07/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com37

8 NOTESDK32 - DK34 - DK3738www.krohne.com07/2009 - 4000287102 MA DK32-34-37-R04-en

DK32 - DK34 - DK37NOTES 807/2009 - 4000287102 MA DK32-34-37-R04-enwww.krohne.com39

KROHNE product overview© KROHNE 07/2009 - 4000287102 MA DK32-34-37-R04-en - Subject to change without notice.• 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 tankersHead Office KROHNE Messtechnik GmbHLudwig-Krohne-Str. 5D-47058 Duisburg (Germany)Tel.:+49 (0)203 301 0Fax:+49 (0)203 301 10389info@krohne.deThe current list of all KROHNE contacts and addresses can be found at:www.krohne.com