KROHNE DW 184 (01) PDF MANUAL


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PDF Content Summary: © KROHNE 01/2006 7.02125.23.00 CMD Installation and operating instructions DW 181 – 184 Standard, high-temperature, tropical and ATEX versions Flow switches

Electromagnetic flowmeters Variable area flowmeters Mass flowmeters Ultrasonic flowmeters Vortex flowmeters Flow controllers Level measuring instruments Pressure and temperature Heat metering Communications technology Switches, counters, displays and recorders Engineering systems & solutions Table of contents General advice on safety………………………………………………………………………….. 4 Standards / Approvals…………………………………………………………………………….. 4 Ex safety instructions……………………………………………………………………………… 4 Handling……………………………………………………………………………………………… 4 Product liability and warranty……………………………………………………………………. 5 Items included with supply……………………………………………………………………….. 5 Documentation supplied………………………………………………………………………….. 5 Official approvals and certificates………………………………………………………………. 5 Principle components……………………………………………………………………………... 6 Equipment labels…………………………………………………………………………………… 7 Type code……………………………………………………………………………………………. 8 1 Mechanical Installation……………………………………………………………………… 9 1.1 Positioning the flow switch……………………………………………………………………. 9 1.2 Installation in hazardous areas (Ex applications)………………………………………….. 9 1.3 Connecting the DW 18 to the pipe…………………………………………………………… 9 1.4 Flow direction…………………………………………………………………………………... 9 2 Electrical Connections…………………………………………………………………….. 10 3 Commissioning……………………………………………………………………………… 11 3.1 General notes………………………………………………………………………………… 11 3.2 Adjusting the limit switches - standard and EEx ia flow switch versions………………. 11 3.2.1 Type G indicator……………………………………………………………………………. 11 3.2.2 Type A indicator…………………………………………………………………………..... 12 3.3 Adjusting the limit switches - EEx d flow switch version…………………………………. 12 3.3.1 MS 12/BRX switch…………………………………………………………………………. 12 4 Display………………………………………………………………………………………... 13 4.1 Local Flow indication………………………………………………………………………… 13 4.2 Limit Switches………………………………………………………………………………… 13 4.3 EEx d version…………………………………………………………………………………. 14 4.4 High-temperature version (KROHNE temperature class H3, non-EEx)………………... 15 4.5 Tropical version (non-EEx)………………………………………………………………….. 15 2 Installation and operating instructions DW 181 - 184 5 Service………………………………………………………………………………………... 16 5.1 Maintenance………………………………………………………………………………….. 16 5.2 Exploded view of instruments………………………………………………………………. 16 5.3 Spare parts……………………………………………………………………………………. 18 5.4 Inspection procedure………………………………………………………………………… 21 5.4.1 Inspection procedure: measuring assembly…………………………………………….. 21 5.4.2 Inspection procedure: housing (DW181 & DW182 models)…………………………... 21 5.5 Basic servicing procedures………………………………………………………………….. 22 5.5.1 Changing the position of the dial on the type A indicator……………………………… 22 5.5.2 Removing the display assembly: operating faults in the housing DW18x Std /EExia flow controllers equipped with type G or A indicators……………………………………….. 23 5.5.3 Cleaning the springs or changing the measuring system sub-assembly…………….. 24 5.5.4 Changing gaskets in DW 183 flow controllers…………………………………………. 24 6 Technical Data………………………………………………………………………………. 25 6.1 Flow range table by flow range code………………………………………………………. 28 6.2 Instrument version materials………………………………………………………………... 30 7 Dimensions and Weights………………………………………………………………….. 31 8 Measuring Principle………………………………………………………………………… 36 8.1 Measuring systems…………………………………………………………………………... 36 8.2 DW 183………………………………………………………………………………………... 36 Appendix A: Declaration of conformity: CE………………………………………………….. 37 Appendix B: If you need to return a device for testing or repair to KROHNE…………. 38 Installation and operating instructions DW 181 - 184 3 General advice on safety This manual gives a complete set of instructions for the installation, operation and maintenance of the standard and ATEX versions of the DW 18 flow switches. DW 18 flow switches must be used with liquids that do not have any gas pockets. Special regulations are applicable to the use of equipment in hazardous locations, and these are described in this booklet. Data is supplied on explosion protection. Assembly, installation, commissioning and maintenance of equipment in hazardous areas must only be carried out by qualified personnel with relevant explosion protection training. Standards / Approvals DW 18 flow switches meet the protection requirements of Directive 89/336/EEC in conjunction with EN 50081-1 and EN 50082-2, and Directives 73/23/EEC and 93/68/EEC in conjunction with EN 61010-1, and also bear the CE symbol. These instruments, when ordered with the appropriate options, are certified for use in hazardous locations by the INERIS certification agency under INERIS 03ATEX0045X. They respect the Health & Safety regulations in force by conforming to EN 50014 (+ A1 & 2), EN 50018, EN 50020, EN50284, EN 50281-1-1 (+ A1) and EN 13463-1. Ex safety instructions The DW 18 flow switch series are suitable for monitoring flow of liquid in pipes in hazardous areas. They may be approved for use in explosive atmospheres of all flammable substances in Gas Group IIC in Zone 1 and applications requiring Category 2 equipment for EEx d applications and Gas Group IIC in Zone 0 requiring Category 1 equipment with an intrinsically-safe power supply for EEx ia applications. Ex Equipment Category Definitions Category 1 G/D – instruments: for intrinsically-safe applications The signal converter for the limit switch options and the measuring components are located in hazardous areas requiring instruments qualified as being category 1. The G/D rating states that the instrument is qualified for gas and dust environments. EEx ia-approved devices must be used with a certified intrinsically-safe power supply. Category 2 G/D – instruments: for applications using the EEx d-rated explosion-proof box The signal converter for the limit switch options and the measuring components are located in hazardous areas requiring instruments qualified as being category 2. The G/D rating states that the instrument is qualified for gas and dust environments. Handling The device weighs between approx. 2 kg (4.5 lb) and 14 kg (30 lb). Carry using both hands to lift the device carefully by the tube. If necessary, use lifting gear. Avoid hard blows, jolts, impacts, etc. when handling the DW 18. 4 Installation and operating instructions DW 181 - 184 Product liability and warranty The DW 18 flow meter is designed solely for measuring the flow rate of liquids without any gas pocket. Special codes and regulations apply to its use in hazardous areas. Responsibility as to suitability and intended use of these level gauges rests solely with the user. Improper installation and operation of our level gauges may lead to loss of warranty. In addition, the "General conditions of sale", forming the basis of the purchasing contract, are appli cable. If you need to return the level gauge to the manufacturer or supplier, please refer to the information given in Appendix B. Items included with supply The scope of supply encompasses, in the version ordered: • Flow meter Documentation supplied • Installation and operating instructions (this manual) including description of special versions and functions. Official approvals and certificates Application Approved by Instrument version Certification mark ATEX certification INERIS DW 18 TYPE 18. Certificate no. INERIS 03ATEX0045X* *This EC-type Examination Certificate is available in KROHNE’s download centre on krohne.com/. Installation and operating instructions DW 181 - 184 5

Principle components DW 18 Standard or EEx ia version DW 18 EEx d version DW 18 HT (H3) version * Equipment labels shown on next page 1 Indicator type G (linear scale) or A (dial) 2 Equipment label* 3 Flange (illustrated) or screwed connection 4 Indicator cover locking pin 5 Flow direction arrow (DW183/4) 6 Wiring compartment cover 7 Gland (plugged) 8 Cable fitting (PG 13.5) 9 Measuring tube 1 Equipment labels* 2 MS 12/BRX switch housing 3 Cable fitting (to be supplied by the customer) 4 PE terminal 5 Flow direction arrow (on measuring tube for DW181/2) 6 Socket set screw for adjusting switch position 7 Pressure housing 8 Equipment dog-tag (tag no., etc.) 9 Screw-on connection 1 Pressure housing 2 Switch sheathed in a PTFE cartridge 3 Measuring tube 4 Electric cable in fibre glass sheathing 5 MS 14 switch information label 6 Wiring box 7 Cable fitting (PG 9)

6 Installation and operating instructions DW 181 - 184 Equipment labels Standard label (all devices) 1 Designation code acc. to order options list (e.g.V7BD1...)* 2 Type code (e.g. DW181/C/011/B/G/KA/N/G1)** 3 Purchase order number 4 Factory serial number 5 Customer tag number EEx ia supplementary information label (e.g. version K1 NO) 1 ATEX gas group and equipment category (e.g. II 1 GD) 2 Year built 3 ATEX certification code 4 Electrical safety values 5 Wiring diagram 6 Protection concept & gas group + sub-div. and temperature class (e.g. EEx ia IIC T3...T6) EEx d supplementary information label (e.g. version NC) 1 Limit switch code 2 ATEX certification code 3 Year built 4 ATEX gas group and equipment category (e.g. II 1/2 GD) 5 Protection concept & gas group + sub-div. and temperature class (e.g. EEx d IIC T3...T6) 6 Factory serial number 7 Maximum switching capacity 8 Wiring diagram * See DW 181-184 Data sheet for a list of order options and designation codes ** See type code definitions on the next page Installation and operating instructions DW 181 - 184 7 Type code Refer to the standard device label, item 2 on the previous page. DW . . . / . / . . . . / . . / . / . . . / . . / . . 1 2 3 4 5 6 7 8 Type code element Code Code definition

1 Type series 181 182 183 184 2 Measuring system C E P For horizontal or vertical pipes, screw connection G¾…G2, measuring system C or E* For horizontal or vertical pipes, flange connection DN15…65 and ½”…2”-150 lbs, measuring system C or E* For horizontal or vertical pipes, flange connections DN65…200 and 3”…8”-150 lbs, measuring system P* For horizontal pipes (DN ≥250 or 10”, mounting flange DN150 PN16 or 6”-150 lbs, measuring system P* Measuring disc in tapered tube Nozzle with baffle Baffle in constant diameter pipe

3 Code number 011 - 204 See section 7.1: Flow range table for the characteristics of each code number.

4 Material of construction - see also section 7.2 B RR R N Bronze Stainless steel (SS) 316 L SS 316L measuring tube, steel connection Steel

5 Indicator system G A 6 Limit switches K1 K2 KV1 KV2 7 Application field N Ex d Ex ia 8 Connection G ¾…G2 DN15…200 (½”…8”) * Refer to section 9.1 ** Bistable. Linear scale marks Dial with flow units 1 NC or 1 NO switch** 1 NC and 1 NO switch** Amplifier relay: 1 change-over switch** Amplifier relay: 2 change-over switches** Normal locations Hazardous locations Intrinsically-safe applications Pipe thread Flange connection

NO is a “normally open” switch during operation (closed switch when flow is decreasing) NC is a “normally closed” switch during operation (closed switch when flow is increasing). 8 Installation and operating instructions DW 181 - 184 1 Mechanical Installation 1.1 Positioning the flow switch No obstacles along the pipe within five diameters (D) upstream and two diameters downstream of the instrument. 1.2 Installation in hazardous areas (Ex applications) Read all instructions referring to flow switches in hazardous locations before installation. Check that the flange, gasket and other materials in contact with the product are compatible. Refer to the information given on the converter nameplate, the flange markings and specifications given in the ATEX approval certificate. 1.3 Connecting the DW 18 to the pipe • Before installation, clean the piping to remove any dust or weld debris. • Fit the instrument on the pipe with the arrow on the housing pointing in the direction of flow. • Flange connections: ensure that the gaskets are in place, flange facings are aligned and parallel and that the bolts have been tightened with the amount of torque specified in European or local (if outside the E.U.) standards. 1.4 Flow direction The DW 183 and DW 184 can be installed in any position on the piping. However, the position of installation and the flow direction must be indicated in the customer order (i.e. up, down, left to right and right to left) as the weight of the baffle disc is taken into account when calibrating the instrument. Flow direction must be indicated for DW 181 and DW 182 instruments equipped with type A indicators. The DW 184 is used for high-velocity or turbulent flows in pipes with diameters greater than DN250. A special device, called a stilling well, is immersed in the liquid flow and channels the fluid through a tube in which the disc moves, secured to the end of a rigid support. This reinforced pivot enables the flow switch to be used in difficult conditions. These instruments are only supplied with an index display (indicator type “G”) and switches. They are not equipped with a graduated dial. The heights of the connection piece indicated for the production of the mating flange must be respected. Installation and operating instructions DW 181 - 184 9 2 Electrical Connections Disconnect the power supply before opening the housing

• The electrical connection conforms to the standard EN61010-1, protection class 1 (for aluminium housing) or class 2 (for PVC housing), voltage category III, and interference degree 2. • The DW range conforms to EMC directives NF EN 50 081.1 (Emission) and NF EN 50 082.2 (Immunity). • It is obligatory to have a switching or circuit breaking device, following present regulations. The devices should completely isolate the unit and be easily accessible, close to the unit. • Both the live (L) and neutral (N) wires should be protected by a fuse (4…6.3 A Time Lag). During the wiring procedure the ground wire Number of switches 1 2 Switch types Limit switch adjustable over entire range Type A K1 B Type K1 C Type K2 D Type K2 E Type K2 F Type K2 G should always be connected first (relevant only for aluminium housing). • EEx ia versions must be used with a certified intrinsically-safe power supply. N.B. Use of the unit 1 Type KV1 1 Type KV2 H

outside the specifications detailed in this manual can compromise the safety measures designed into the unit. Always disconnect the power supply before accessing the terminals. K1 + K2 Change over (SPDT)

10 Installation and operating instructions DW 181 - 184 3 Commissioning 3.1 General notes The flow switch is delivered pre-calibrated and ready for use. Open the valves slowly when starting operation. 3.2 Adjusting the limit switches - standard and EEx ia flow switch versions The limit switches can be adjusted individually over the entire measuring range. To adjust, remove the locking pin securing the cap and remove the cap. 3.2.1 Type G indicator The limit switch adjustment is indicated by a green strip (normally closed switch) or a black strip (normally open switch) in a graduated window. For flow switches manufactured before September 1, 1991, the strips are red (normally closed switch) or orange (normally open switch). Each graduation corresponds to 1/10 of the total measuring range, i.e. 35 l/h for a flow range of 50…400 l/h. This system enables the limit switch to be adjusted without having to circulate fluid in the pipe. It is only necessary to adjust the micrometer screw (item 2) in order to move the switch support (item 3) which has the coloured strip on its upper section. “G” linear index indicator assembly 1 Index 2 Micrometer screw 3 Switch support 4 Switch 5 Control magnet 6 Following magnet Installation and operating instructions DW 181 - 184 11 3.2.2 Type A indicator The switch is adjusted by unlocking the adjustment screw (item 7) and repositioning the switch support arm (item 8). “A” graduated dial indicator assembly 1 Pointer 2 Dial 3 Following magnet 4 Control magnet 5 Mechanism 6 Switch 7 Adjustment screw 8 Switch support 3.3 Adjusting the limit switches - EEx d flow switch version 3.3.1 MS 12/BRX switch The switch is adjusted by unscrewing the limit switch adjustment screw M8x10 (2) on top of the pressure housing with a 4mm hexagon key. The switch (in its metal sheath) may then be repositioned as required before retightening the screw. The original position is etched onto the sheath. MS 12/BRX switch assembly 1 MS 12/BRX switch 2 Limit switch adjustment screw 3 Switch sheath 4 Switch magnet 5 Pressure housing 12 Installation and operating instructions DW 181 - 184 4 Display 4.1 Local Flow indication Indicator “G” Indicator “A”

All flow switches can be equipped with indicator G. Scale marks are from 1 to 10 to allow visual control of the flow rate. The switching point may be changed as and when required. The DW 181, DW 182 and DW 183 flow switches up to meter size DN100 (4”) can be supplied with indicator A. The dial is marked in flow units (e.g. l/h, m³/h) to provide more accurate flow readings. The switching points are factory marked on the dial. With this indicator it is also possible to adjust the switching points at non-flowing conditions.

High-temperature versions are supplied without a local indicator. 4.2 Limit Switches Every flow switch can be equipped with either one or two limit switches which can be adjusted over the entire measurement range. Limit switch specifications Type and number of switches Switch rating Standard K1(K2) single (twin for K2) bi-stable limit switch 14VA max. (max. 350 V AC, max. 0.4 A) reed type IA42 ATF 15-45 EExi safety values Ii < 500mA, Ci = 0 nF, Li = 0 µH With change over K1(K2) single (twin for K2) bi-stable limit switch 3 VA max. (max. 28 V DC, max. 0.25 A) type reed CM21… EExi safety values Ii< 500 mA, Ci= 0 nF, Li= 0 µH With relay KV1 (KV2) 2000 VA max. (max. 250 V AC, max. 8 A)

Power supply: 240/110/48/24 V AC (50/60 Hz) 110/48/24 V DC Response time: 5…12ms relay type Finder

EEx d values See section 4.3: EEx d version

High-temperature version (non-EEx) single bi-stable limit switch 18 VA max. (max. 220 V, max. 0.8 A) reed type IA13….

The switch ratings are given for standard resistance loads. Make sure you use the correct protection circuits when using other types of load (e.g. inductive). Installation and operating instructions DW 181 - 184 13 4.3 EEx d version The MS 12/BRX (EEx d) switch features a flameproof aluminium enclosure. The limit switches are type K1 and K2 bi-stable reed switches without changeovers or KV1 relays and are supplied without a local display. Approval EEx d IIC T6…T1 INERIS certificate 03 ATEX 0045X Technical data MS 12/BRX switch Switches NC*** and NO**** Switch rating

K1, K2 (reed switch) KV1 (relay) Max. switching capacity dissipated by Ex d housing Ambient temperature Process temperature Protection category to EN 60529/NEMA 250 14 VA (350 V AC; 0,25 mA 2000 VA (250 V AC; 8 A 20 VA; 1.5 A; 380 V AC -40…+80°C or -40…+175°F max. 150°C or max. 300°F* IP 65 / NEMA 6 when T195…80°C or T380…175°F*,**

Screw connection M20 x 1.5 without cable entry fitting*** * T80…T195°C depending on the ambient temperature and process temperature (see section 7: Technical data). **Maximum surface temperature of device. ***Optional: M25x1.5 or NPT ¾ threads 14 Installation and operating instructions DW 181 - 184 4.4 High-temperature version (KROHNE temperature class H3, non-EEx) All DW 18 switches can be supplied for high-temperature service up to max. 300°C or 570°F but without indicator. The switches are located in a PTFE cartridge fastened directly to the measuring unit. Sealing material: DW 181 / DW 182 Klingerit (asbestos-free) DW 183 / DW 184 Klingerit or fully welded (optional) Cable connection (350 mm or 13 ¾ ”) to aluminium terminal housing: fibre glass sheathing Technical data MS 14 (NC*** or NO****) switch

Max. switching capacity 20 VA; 0,5 A; 250 V DC

Ambient temperature -25…+60°C or -15…+140°F

Protection category to EN 60529/IEC 529 IP 44

Cable fitting PG 9 (supplied) *** NC: switch that is “normally closed” during operation (closed switch when flow is increasing) **** NO: switch that is “normally open” during operation (closed switch when flow is decreasing) 4.5 Tropical version (non-EEx) The flow switch junction boxes are equipped with an Amphenol socket outlet for use in tropical climates. The matching plug is also supplied. 1-5 Terminals 6 Connecting plug Switch used Terminals used Connection data

K1 1,2 4 K2 1,2 3,5 4 KV1 1,2 3,4,5 For switch K1 For ground connection For switch K1 For switch K2 For ground connection For power supply For change over (SPDT)

Installation and operating instructions DW 181 - 184 15 5 Service 5.1 Maintenance In normal operation no maintenance is required. However, the flow switch must be cleaned if particles in suspension in the liquid build up on the measuring mechanism. Caution Check that the cleaning product used will not chemically react with (i.e. corrode) the component materials. 5.2 Exploded view of instruments DW 183 Std / EEx ia DW 184 Std / EEx ia

52a Pressure resistant housing 52b PTFE ring 52c Washer 52d Tube 52e O-ring 53 Magnet lever with measuring disc 54 Measuring spring 55 Nut 56 Spring washer 57 Tubular body with collar and flanges 58 PTFE gasket 62a Pressure resistant housing 62b PTFE ring 62c Washer 62d Tube 62e O-ring 63a Measuring disc 63b Magnet lever 64 Measuring spring 65 Nut 66 Spring washer 67 Flange with stilling well 68 PTFE gasket

The parts listed above are not supplied separately. Please refer to section 5.3: Spare parts for a list of available spare parts. 16 Installation and operating instructions DW 181 - 184 DW 182 (181) Std / EEx ia with indication G DW 182 (181) Std / EEx ia with indication A DW 182 H3/K1 High-temperature version (Std) 9 Pressure resistant housing 10 O-ring 11 Magnet lever 12 Measuring spring complete 13 PTFE-ring 14 Measuring disc 15 Tubular body 17 Snap ring 18 Screw 48 Reed switch H3/K1 49 Mount 50 Nut 51 Hexagon socket head screw The parts listed above are not supplied separately. Please refer to section 5.3: Spare parts for a list of available spare parts. Installation and operating instructions DW 181 - 184 17 5.3 Spare parts Measuring spring DW 181 / 182 "C" Magnet lever (Tag 11)/ PTFE Ring (Tag 13)/ Measuring spring (Tag 12)/ Measuring disc (Tag 14) DN N° Code DN N° Code

DN15 C011 XF71010100 C041 XF71010800 DN40 C012 XF71010200 C042 XF71010900

C013 XF71010300 C043 XF71011000

DN 25 C014 XF71010400 C051 XF71011100 DN50 C021 XF71010500 C052 XF71011200 C022 XF71010600 C053 XF71011300 C023 XF71010700 Measuring spring DW 181 / 182 "E" C054 XF71011400

Magnet lever (Tag 11)/ PTFE Ring (Tag 13)/ Measuring spring (Tag 12)/ Measuring disc (Tag 14) DN N° Code DN N° Code

DN15 E015 XF71011500 E045 XF71012300 DN40

E016 XF71011600 E046 XF71012400

E017 XF71011700 E055 XF71012500 DN50 E018 XF71011800 E056 XF71012600

DN 25 E019 XF71011900 E025 XF71012000 E026 XF71012100 E027 XF71012200

Measuring spring DW 183 (2 springs supplied – Tag 54) Meter code n° Flow Direction ↔ ↑ ↓ P081 XF71012700 XF71012800 XF71012900 P082 XF71013000 XF71013100 XF71013200 P083 XF71013300 XF71013400 XF71013500 P084 XF71013600 XF71013700 XF71013800 P085 XF71013900 XF71014000 XF71014100 P086 XF71014200 XF71014300 XF71014400 P087 XF71014500 XF71014600 XF71014700 P088 XF71014800 XF71014900 XF71015000 P089 XF71015100 XF71015200 XF71015300 P101 XF71015400 XF71015500 XF71015600 P102 XF71015700 XF71015800 XF71015900 P103 XF71016000 XF71016100 XF71016200 P104 XF71016300 XF71016400 XF71016400 P105 XF71016500 XF71016600 P106 XF71016700 XF71016800 XF71016900 P107 XF71017000 XF71017100 XF71017200 P108 XF71017300 XF71017400 XF71017500 P109 XF71017600 XF71017700 XF71017800 P121 XF71017900 XF71018000 P122 XF71018100 XF71018200 XF71018300 P123 XF71018400 XF71018500 P124 XF71018600 XF71018700 XF71018800 P125 XF71018900 P126 XF71019000 XF71019100 P127 XF71019200 XF71019300 P128 XF71019400 XF71019500 XF71019600 P129 XF71019700 XF71019800 18 Installation and operating instructions DW 181 - 184 Measuring spring DW 183 (2 springs supplied - Tag 54) continued from last page … Meter code n° ↔ ↑ ↓ P151 XF71019900 XF71020000 XF71020100 P152 XF71020200 XF71020300 XF71020400 P153 XF71020500 XF71020600 XF71020700 P154 XF71020800 XF71020900 XF71021000 P155 XF71021100 P156 XF71021200 XF71021300 XF71021400 P157 XF71021500 XF71021600 XF71021700 P158 XF71021800 XF71021900 XF71022000 P159 XF71022100 XF71022200 XF71022300 P201 XF71022400 XF71022500 XF71022600 P202 XF71022700 XF71022800 XF71022900 P203 XF71023000 XF71023100 P204 XF71023200 XF71023300 XF71023400 P205 XF71023500 XF71023600 XF71023700 P206 XF71023800 XF71023900 XF71024000 Kit gasket DW 181 / 182 Tag Description Silicon code Viton code Perbunan code 2 O-ring D 88,49 X 3,53 8 O-ring 74 X 3 X 80 XF71030100 XF71030200 XF71030300 10 O-ring D 36,17 X 2,62 13 PTFE ring Kit gasket DW 181…4 (ring for pressure resistant housing) for special applications using DW 181…4 HT/H3 version Description Code Description Code PTFE XF71030400 Klingerit XF71030500 Pressure housing DW 181 / 182 Tag Description Standard code HT version code Ex version code 9 pressure housing

18 screw A2 70 CHC, M6-20 DIN 912 16 nut A2 70 HM6 17 spring washer A4 W6 XF71040100 XF71040200 XF71040300

Reed switch "A" DW 181 / 182 / 183 Tag Description NO** code NC* code Changeover code 33 reed switch 32a nut A2 70H,M3 31 spring washer A2 M3 plate XF71050900 XF71051000 XF71051100 32 screw A2 70 H3-10 DIN933 30 clamp plate Reed switch "G" DW 181 / 182 / 183 Tag Description NO** code NC* code Changeover code 34 reed switch G/K1 46 spring washer D5X9 XF71051200 XF710105300 XF71051400 47 snap ring AC E005 REF A 75 55 * NC: switch that is “normally closed” during operation (closed switch when flow is increasing) ** NO: switch that is “normally open” during operation (closed switch when flow is decreasing) Installation and operating instructions DW 181 - 184 19 Complete plastic housing for ... Code Description Code Description XF71060100 DW18/AK1 green XF71062900 DW18/GKV1 24VAC XF71060200 DW18/AK1 black XF71063000 DW18/GKV1 48VAC XF71060300 DW18/AK1 "INV" XF71063100 DW18/GKV1 110VAC XF71063200 DW18/GKV1 220VAC XF71060400 DW18/AK2 green/green XF71060500 DW18/AK2 black/black XF71063300 DW18/GKV1 24VDC XF71060600 DW18/AK2 green/black XF71063400 DW18/GKV1 48VDC XF71060700 DW18/AK2 black/green XF71063500 DW18/GKV1 110VDC XF71060800 DW18/AKV1 24VAC XF71063600 DW18/GKV2 NC 24VAC XF71060900 DW18/AKV148VAC XF71063700 DW18/GKV2 NC 48VAC XF71061000 DW18/AKV1 110VAC XF71063800 DW18/GKV2 NC 110VAC XF71061100 DW18/AKV1 220VAC XF71063900 DW18/GKV2 NC 220VAC XF71061200 DW18/AKV1 24VDC XF71061300 DW18/AKV1 48VDC XF71064000 DW18/GKV2 NC 24VDC XF71061400 DW18/AKV1 110VDC XF71064100 DW18/GKV2 NC 48VDC XF71064200 DW18/GKV2 NC 110VDC XF71061500 DW18/AKV2 24VAC XF71061600 DW18/AKV2 48VAC XF71064300 DW18/KV1/BRX NC 220V AC XF71061700 DW18/AKV2 110VAC XF71064400 DW18/KV1/BRX NC 110V AC XF71061800 DW18/AKV2 220VAC XF71064500 DW18/KV1/BRX NC 110V DC XF71061900 DW18/AKV2 24VDC XF71064600 DW18/KV1/BRX NC 48V AC XF71062000 DW18/AKV2 48VDC XF71064700 DW18/KV1/BRX NC 48V DC XF710612100 DW18/AKV2 110VDC XF71064800 DW18/KV1/BRX NC 24V AC XF71064900 DW18/KV1/BRX NC 24V DC XF71062200 DW18/GK1 green XF71062300 DW18/GK1 black XF71065000 DW18/KV1/BRX NO 220V AC XF71062400 DW18/GK1 INV.yellow XF71065100 DW18/KV1/BRX NO 100V AC XF71065200 DW18/KV1/BRX NO 110V DC XF71062500 DW18/GK2 green/green XF71065300 DW18/KV1/BRX NO 48V AC XF71062600 DW18/GK2 black/black XF71065400 DW18/KV1/BRX NO 48V DC XF71062700 DW18/GK2 green/black XF71065500 DW18/KV1/BRX NO 24V AC XF71062800 DW18/GK2 black/green XF71065600 DW18/KV1/BRX NO 24V DC NC: switch that is “normally closed” during operation (closed switch when flow is increasing) NO: switch that is “normally open” during operation (closed switch when flow is decreasing) Kit indicator type A Kit indicator type G Tags Description Code Tags Description Code

22…29 Indicator sub assembly (A) Kit cap/cover DW 181/182/183 XF71065900 36…47 Indicator sub assembly (A) XF71066000

Tag Description Code 1 cap 2 O-ring Perb D 88,49 X 3,53 XF71070100 4 locking pin 316L for cover 5+6 gasket + cover + nut 20 Installation and operating instructions DW 181 - 184 Kit measuring system Reed switch for EXD or HT versions Tags Description Code Tag Description Code

52a…e, DW 183 MS 14/HT NC XF 71051500 XF71080100 48

53…56,57 / RR DW 183 / RR / HT XF71080400 MS 14/HT NC XF 7101600 - MS 12/BRX (EXD) NC XF 71051700 - MS 12/BRX (EXD) NO XF 71051800

- DW 183 / RR / EXD XF71080300

5.4 Inspection procedure 5.4.1 Inspection procedure: measuring assembly Check the condition of the measuring system, cone-disc or nozzle-disc. Check the condition of the spring. In the event of leaks between the body and the cap, tighten the four bolts securing the cap. Change the O-ring if necessary. Carefully follow the maintenance procedures in section 5.5. 5.4.2 Inspection procedure: housing (DW181 & DW182 models) Check switch operation using an ohmmeter. Check the operation of the indicating mechanism. By removing the lock ring (Tag no. 7, section 5.2) holding the housing onto the assembly, it is possible to remove the housing from the measuring body without removing the flow switch from the pipe, or stopping the flow. Carefully follow the maintenance procedures in section 5.5. Installation and operating instructions DW 181 - 184 21 5.5 Basic servicing procedures DW 181…4 servicing by the customer is limited by warranty to: • Changing the position of the dial on the type A indicator • Removing the display assembly • Removing the spring-loaded probe assembly • Changing gaskets in DW 183 flow controllers Other repairs must be done by KROHNE-authorized service staff. Read all servicing instructions carefully. 5.5.1 Changing the position of the dial on the type A indicator Warning : Do not remove the 4 bolts holding the pressure housing onto the measuring tube. For the “A” indication version, it may be necessary to modify the position of the dial when flow direction has been reversed, in order to read the flow rate correctly. Follow the steps 1 to 6. Step 1 Remove the locking pin and remove the cap. 1 Dial 2 Screwdriver Step 2 Extract the pointer using an extractor or the flats of two screwdrivers placed at either side of the pointer. 3 Pointer 4 Screwdriver 5 Dial Step 3 Unscrew the dial. 22 Installation and operating instructions DW 181 - 184 Step 4 Reposition the dial as required; attachment holes are provided to reposition the dial in 90° steps. Fit screws. 6 Dial 7 Screwdriver Step 5 Hold the pivoting arm and fit the pointer aligned with zero. Step 6 Reinstall the cap and locking pin. 8 Interference fit between pointer shaft and hole in dial 9 Pointer 10 Dial 11 Pivoting arm 5.5.2 Removing the display assembly: operating faults in the housing DW18x Std /EExia flow controllers equipped with type G or A indicators Warning : Do not remove the 4 bolts holding the pressure housing onto the measuring tube. If the fault lies inside the housing, return the display assembly to the factory for standard replacement. The display may be removed under flow conditions. • Remove the whole display assembly from the pressure housing by extracting the snap-ring underneath the display. See section 5.2 for the exploded views of the DW18 Std/EExia devices to locate this component (Tag no. 7). Installation and operating instructions DW 181 - 184 23 5.5.3 Cleaning the springs or changing the measuring system sub-assembly Warning: Remember to shut off the flow before performing this operation Step 1 UNSCREW the 4 nuts and washers dia. M12 (1). Step 2 SEPARATE the two components (2) and (3) using a screwdriver. Step 3 REMOVE the pressure housing (2) in the direction of the arrow F. Either Step 4A… CLEAN the springs (4) … or Step 4B CHANGE the measuring system sub-assembly Step 5 REASSEMBLE by following instructions 1, 2, 3 and 4 in reverse order. Take care to orient the measuring disc (A) so that it is facing upstream. 5.5.4 Changing gaskets in DW 183 flow controllers Warning: Remember to shut off the flow before performing this operation Step 1 UNSCREW 4 nuts and washers dia. M12 (1). Step 2 SEPARATE the two components (2) and (3) using a screwdriver. Step 3 REMOVE the pressure housing (2) in the direction of the arrow F. Step 4 REMOVE the gaskets from their recess (4). Step 5 CHANGE the gaskets and reassemble by following instructions 1, 2, 3 and 4 in reverse order. Take care to orient the measuring disc (A) so that it is facing upstream. 24 Installation and operating instructions DW 181 - 184 6 Technical Data DW 181 DW 182 DW 183 DW 184 Full-scale range (100% values) Flow rate m3/h 0.16…30 0.16…30 24…250 – (US GPM) (0.7…132) (0.7…132) (106…1100)

Flow velocity m/s (ft/s) Connection – – – 0.4…4 (0.66…1.31)

Pipe thread G 3/4” … 2” – – – Flanges to DIN 2501 – DN15- (DN65), DN150/ (NFE 29203) DN50/PN40 DN100, DN125, PN16…PN25 (DN65/PN16) DN150/PN16 DN80/PN40, DN200/PN10 Flanges to ANSI B16.5 – 1/2”…2” (21/2”) 3” (21/2”)…8” 6” Class 150 lb/RF Information on other standards and pressure ratings supplied on request Measuring system Measuring disc C C – – with tapered tube Nozzle with baffle E E – – Baffle – – P P Indicator Scale division 1 to 10 G G G G in flow units A A A (≤DN100 / 4”) – Pipe run / flow direction Vertical/upwards VU VU VU – Vertical/downwards VO VO VO – Horizontal/either way H H H H Max. operating pressure*, *** - ≤DN50 or 2”: ≤DN150 or 6”: -

40bar or 580psig 40 bar or 580 psig 16 bar or 230 psig 25 bar or 365 psig

- ≥DN65 or 3”: ≥DN200 or 8”: -

16 bar or 230 psig 10 bar or 145 psig**

DN150 PN16 DN150 PN16

<13 bar (for dangerous fluids only – group 1 Directive 67/548/CEE -) <13 bar (for dangerous fluids only –group 1 Directive 67/548/CEE -)

DN80 PN40 DN80 PN40

<25 bar (for dangerous fluids only – group 1 Directive 67/548/CEE -) <25 bar (for dangerous fluids only –group 1 Directive 67/548/CEE -)

* Information on higher pressure levels supplied on request, ** PN 16 optional, *** Subject to process connection used and flange temperature Installation and operating instructions DW 181 - 184 25

Product temperature *** Standard ≤120°C or ≤250°F Housing with ventilation ≤150°C or ≤300°F ≤120°C or ≤250°F ≤150°C or ≤300°F ≤120°C or ≤250°F ≤150°C or ≤300°F ≤120°C or ≤250°F ≤150°C or ≤300°F

HT–version w/o indicator ≤300°C or ≤570°F ≤300°C or ≤570°F ≤300°C or ≤570°F ≤300°C or ≤570°F

*** Subject to process connection used and flange temperature 26 Installation and operating instructions DW 181 - 184 Special conditions for ATEX applications Flow indicator DW18* EEx d Authorized markings: II 1/2 GD EEx d IIC T…* IP65 T…°C**,*** Temperature Class Process temperature Ambient temperature range T6 / T80°C or 175°F** T(fluid) ≤60°C or 140°F -40…+50°C or -40…+120°F T5 / T95°C or 200°F** T(fluid) ≤80°C or 175°F -40…+50°C or -40…+120°F T4 / T130°C or 265°F** T(fluid) ≤120°C or 250°F -40…+60°C or -40…+140°F T3 / T195°C or 380°F** T(fluid) ≤150°C or 300°F -40…+80°C or -40…+175°F Flow indicator DW18* EEx ia Authorized markings: II 1 GD EEx ia IIC T…* IP65 T…°C**,*** Temperature Class Process temperature Ambient temperature range T6 / T80°C or 175°F** T(fluid) ≤60°C or 140°F -40…+40°C or -40…+105°F T5 / T95°C or 200°F** T(fluid) ≤80°C or 175°F -40…+40°C or -40…+105°F T4 / T130°C or 265°F** T(fluid) ≤120°C or 250°F -40…+50°C or -40…+120°F T3 / T195°C or 380°F** T(fluid) ≤150°C or 300°F -40…+80°C or -40…+175°F * Maximum surface temperature of device ** T3, T4, T5 or T6 according to process temperature and ambient temperature *** T195…80°C according to process temperature and ambient temperature Viscosity

Standard mPa.s lb/ft.s Special version mPa.s ≤30 or ≤20x10-3 >30 or ≤30 or ≤20x10-3 ≤30 or ≤20x10-3 ≤30 or ≤20x10-3

lb/ft.s Repeatability (switching point) >20x10-3 >30 or >20x10-3 >30 or >20x10-3 >30 or >20x10-3 ±3% ±3% ±3% ±3% Measuring accuracy (Indicator A) ±15% ±15% ±15% – (≤DN100, 4”)

Protection category IP 55 (standard version) to EN 60529 / IEC 529 IP 44 (high-temperature version) IP 65 (ATEX version)

Electromagnetic compatibility (EMC) Limit switches EN 50081-1 and 50082-2

Type Number and description K1 1 N/C* or 1 N/O* switch (bistable) or 3-wire SPDT (change over) K2 1 N/C* or 1 N/O* switch (bistable) or 3-wire SPDT (change over) 2 N/C* or 2 N/O* switches also possible in conjunction with high temperature version H3 KV1, KV2 1,2 changeover switches (bistable) with amplifier relay Type Max. switching capacity rating K1, K2 (standard) max. 14 VA (max. 350 V AC; max. 0.4 A) K1, K2 with changeover max. 3 VA (max. 28 V DC; max. 0.25 A) EEx d characteristics max. dissipation (Ex d housing): 20 VA; max. 380 V AC; max. 1.5 A EEx ia safety values Ii < 500 mA, Ci = 0 nF, Li = 0 µH Reed switch, HT 18 VA (max. 220 V; max. 0.8 A) KV1, KV2 max. 2000 VA (max. 250 V AC, max. 8 A) Amplifier relay characteristics Power supply 240/110/48/24 V AC, 110/48/24 V DC Response time 5…12 ms * Refer to section 2: Electrical connections for definition. Installation and operating instructions DW 181 - 184 27

6.1 Flow range table by flow range code Meter size DW 181 DW 182 Code Flow range – Indicator G and A Pressure loss pmax.

Flanges for qmin. for qmax

Screw DIN ASME l/h US GPM mba r psig mbar psig

3/4” 15 1/2” C 011 20…160 0.09…0.70 16 0.23 80 1.16 C 012 50…400 0.22…1.76 67 0.97 176 2.55 C 013 150…1000 0.66…4.40 140 2.03 440 6.38 C 014 300…2500 1.32…11.01 150 2.18 490 7.11 E 015* 64…160 0.28…0.70 65 0.94 370 5.37 E 016* 100…250 0.44…1.10 150 2.18 870 12.62 E 017 160…400 0.70…1.76 18 0.26 110 1.60 E 018 250…630 1.10…2.77 40 0.58 270 3.92 E 019 400…1000 1.76…4.40 18 0.26 110 1.60 1” 25 1” C 021 200…1600 0.88…7.04 18 0.26 80 1.16 C 022 300…2500 1.32…11.01 26 0.38 180 2.61 C 023 500…4000 2.20…17.61 85 1.23 400 5.80 E 025 640…1600 2.82…7.04 15 0.22 110 1.60 E 026 1000…2500 4.40…11.01 45 0.65 240 3.48 E 027 1600…4000 7.04…16.61 25 0.36 140 2.03 11/2” 40 11/2” C 041 500…4000 2.20…17.61 14 0.20 68 0.99 C 042 800…6300 3.52…27.74 32 0.46 110 1.60 C 043 1200…10000 5.28…44.03 60 0.87 160 2.32 E 045 2500…6300 11.01…27.74 15 0.22 100 1.45 E 046 4000…10000 17.61…44.03 50 0.73 260 3.77

2” 50/6 5 2”/21/2” C 051 1200…10000 5.28…44.03 30 0.44 80 1.16

C 052 2000…16000 8.81…70.45 65 0.94 260 3.77 C 053 2500…20000 11.01…88.06 72 1.04 350 5.08 C 054 7500…30000 33.02…132.09 47 0.68 360 5.22 E 055 6400…16000 28.18…70.45 20 0.29 110 1.60 E 056 8000…16000 35.00…70.45 30 0.44 140 2.03 * only with indicator G 28 Installation and operating instructions DW 181 - 184

Meter size DW 183 Indicator G – Flow range Code Indicator A – Flow range Code Pressure loss pmax.

DIN ASME m3/h US GPM m3/h US GPM mbar psig 65/ 80 21/2”/3” 10…24 44…106 P 081 - - - 10 0.15 16…40 70…176 P 082 10…40 44…176 P 086 20 0.29 20…50 88…220 P 083 13…50 55…220 P 087 10 0.15 24…60 106…264 P 084 15…60 66…264 P 088 12 0.17 28…70 123…308 P 085 17…70 75…308 P 089 12 0.17 100 4” 16…40 70…176 P 101 - - - 10 0.15 24…60 106…264 P 102 15…60 66…264 P 106 23 0.33 32…80 141…352 P 103 20…80 88…352 P 107 14 0.20 40…100 176…440 P 104 25…100 110…440 P 108 23 0.33 28…120 211…528 P 105 30…120 132…528 P 109 33 0.48 125 5” 24…60 106…264 P 121 - - - 20 0.29 40…100 176…440 P 122 25…100 110…440 P 126 24 0.35 48…120 211…528 P 123 30…120 132…528 P 127 26 0.38 60…150 264…660 P 124 37…150 163…660 P 128 24 0.35 70…180 308…793 P 125 45…180 198…793 P 129 24 0.35 150 6” 40…100 176…440 P 151 - - - 30 0.44 60…150 264…660 P 152 37…150 163…660 P 156 32 0.46 70…180 308…793 P 153 45…150 198…793 P 157 37 0.54 90…120 528…969 P 154 55…220 242…969 P 158 34 0.49 100…250 440…1101 P 155 65…250 286…1101 P 159 30 0.44 200 8” 60…150 264…660 P 201 - - - 35 0.51 70…180 308…793 P 202 - - - 40 0.64 90…220 396…969 P 203 55…220 242…969 P 205 44 0.64 100…250 440…1101 P 204 65…250 286…1101 P 206 40 0.58 Installation and operating instructions DW 181 - 184 29 Flow table DW 184 for measuring tube Flow velocity Scale ratio m/s ft/s ≥DN250 (10”) 0.2…0.4 0.66…1.31 1 : 2 (or 65) 0.2…1 1.31…3.28 1 : 2.5 1…4 3.28…13.12 1 : 4 4 13.12 1 : 4 6.2 Instrument version materials

Version Cap Gasket * Measuring system Measuring tube Connection Housing DW 181/B Stainless Steel 316 L Buna Stainless Steel 316 L Bronze Bronze Polycarbonate

DW 181/RR Stainless Steel 316 L DW 182/RR Stainless Steel 316 L Buna Stainless Steel 316 L Buna Stainless Steel 316 L Stainless Steel 316 L Stainless Steel 316 L Stainless Steel 316 L Stainless Steel 316 L Polycarbonate Polycarbonate

DW 183/N Stainless Steel 316 L Buna Stainless Steel 316 L Steel Steel Polycarbonate

DW 183/R Stainless Steel 316 L Buna Stainless Steel 316 L Stainless Steel 316 L Steel * * Polycarbonate

DW 183/RR Stainless Steel 316 L Buna Stainless Steel 316 L Stainless Steel 316 L Stainless Steel 316 L Polycarbonate

DW 184/N Stainless Steel 316 L Buna Stainless Steel 316 L Steel Steel Polycarbonate

DW 184/R Stainless Steel 316 L Buna Stainless Steel 316 L Stainless Steel 316 L Steel * * Polycarbonate

DW 184/RR Stainless Steel 316 L Buna Stainless Steel 316 L Stainless Steel 316 L Stainless Steel 316 L Polycarbonate

*Viton, silicone, or Klingerit gaskets on request. DW 184/R: steel-clad flanges used in all cases. * *Steel flanges for >DN100 or 4” instruments have stainless steel 316 L cladding. 30 Installation and operating instructions DW 181 - 184 7 Dimensions and Weights Type Connection Dimension h Dimension L Weight DIN ASME mm inches mm inches kg lb DW 181 G3/4” 115 4.53 135 5.31 1.7 3.75 Std/EEx ia G1” 120 4.72 160 6.30 1.8 3.97 G11/2" 130 5.12 180 7.09 2.2 4.85 G2” 135 5.31 190 7.48 2.6 5.73 DW 182 15 1/2” 115 4.53 200 7.87 3.0 6.61 Std/EEx ia 25 1" 120 4.72 200 7.87 4.0 8.82 40 11/2" 130 5.12 200 7.87 5.5 12.13 50 2" 135 5.31 200 7.87 7.2 15.87 65 21/2" 135 5.31 200 7.87 9.3 20.50 DW 183 65 21/2” 185 7.28 200 7.87 11.5 25.35 Std/EEx ia 80 3" 185 7.28 200 7.87 12.5 27.56 100 4" 195 7.68 200 7.87 14.0 30.86 125 5" 210 8.27 300 11.81 18.0 39.68 150 6" 220 8.66 300 11.81 23.0 50.71 200 8" 250 9.84 300 11.81 35.0 77.16

DW 184 Std/EEx ia 150 6" 13.5 29.76

DW 181 Std / EEx ia DW 182 Std / EEx ia Dimensions in mm (inches) Installation and operating instructions DW 181 - 184 31 DW 183 Std / EEx ia DW 184 Std / EEx ia

Dimensions in mm (inches)

Type Connection Dimension h Dimension L Weight DIN ASME mm inches mm inches kg lb DW 181 G3/4” 140 5.51 135 5.31 2.35 5.18 EEx d G1” 145 5.71 160 6.30 2.45 5.40 G11/2" 155 6.10 180 7.09 2.85 6.28 G2” 160 6.30 190 7.48 3.25 7.16 DW 182 15 1/2” 140 5.51 300 11.81 3.65 8.05 EEx d 25 1" 145 5.71 300 11.81 4.65 10.25 40 11/2" 155 6.10 300 11.81 6.15 13.56 50 2" 160 6.30 300 11.81 7.85 17.31 65 21/2" 160 6.30 300 11.81 9.95 21.94 DW 183 65 21/2” 210 8.27 400 15.72 12.15 26.79 EEx d 80 3" 210 8.27 400 15.72 13.15 28.99 100 4" 220 8.66 400 15.72 14.65 32.30 125 5" 232 9.13 400 15.72 18.65 41.12 150 6" 245 9.65 400 15.72 23.65 52.14 200 8" 275 10.83 400 15.72 35.65 78.59 DW 184 150 6" n/a n/a n/a n/a 14.15 31.20 EEx d 32 Installation and operating instructions DW 181 - 184 DW 181 EEx d* DW 182 EEx d* DW 183 EEx d* DW 184 EEx d* Dimensions in mm (inches) * The MS 12 / BRX (EEx d) switch is supplied without cable fitting. Only EEx d-certified components and fittings are to be used with the MS 12/BRX switch. Installation and operating instructions DW 181 - 184 33 Type Connection Dimension h Dimension L Weight DIN ASME mm inches mm inches kg lb DW 181 G3/4” 76 2.99 135 5.31 1.10 2.42 HT (H3) G1” 81 3.19 160 6.30 1.20 2.65 G11/2" 91 3.58 180 7.09 1.60 3.53 G2” 96 3.78 190 7.48 2.00 4.40 DW 182 15 1/2” 76 2.99 300 11.81 2.40 5.29 HT (H3) 25 1" 81 3.19 300 11.81 3.40 7.50 40 11/2" 91 3.58 300 11.81 4.90 10.80 50 2" 96 3.78 300 11.81 6.60 14.55 65 21/2" 96 3.78 300 11.81 8.70 19.18 DW 183 65 21/2” 146 5.75 400 15.72 10.90 24.03 HT (H3) 80 3" 146 5.75 400 15.72 11.90 26.24 100 4" 156 6.14 400 15.72 13.40 29.54 125 5" 168 6.61 400 15.72 17.40 38.36 150 6" 181 7.13 400 15.72 22.40 49.38 200 8" 211 8.31 400 15.72 34.40 75.84 DW 184 150 6" n/a n/a n/a n/a 12.90 28.44 HT (H3) DW 181 HT (H3) DW 182 HT (H3) Dimensions in mm (inches) 34 Installation and operating instructions DW 181 - 184 DW 183 HT (H3) DW 184 HT (H3) Dimensions in mm (inches) Installation and operating instructions DW 181 - 184 35 8 Measuring Principle 8.1 Measuring systems Measuring system C: A hinged measuring disc moves freely in the axis of a tapered tube (DW 181, DW 182 only). At flowing conditions, the system adjusts so that the force acting on the disc is in equilibrium with the spring force. Each flow rate thus corresponds to a particular position of the indicator and simultaneously actuates the limit switches. Measuring system E: Instead of being located in a tapered tube, this system incorporates a nozzle (DW 181, DW 182 only) to increase the flow velocity. This version is particularly suitable for liquids with solids content. Measuring system P (DW 183 and 184 flow switches only) This is used for large nominal pipe diameters (DW 183, DW 184). It is similar to system E but does not require a nozzle. Measuring system C Measuring system E (P) 8.2 DW 183 The model DW 183 is recommended for pipe diameters from DN65…200, which can be installed in any position in the piping. The diameter of the measuring tube depends on the flow to be measured and the connection is adapted to that of the piping. The maximum flow rate is 4 m/sec. The DW 183 is available in the “N” (carbon steel) “R” (stainless steel-coated carbon steel) or “RR” (stainless steel) versions. The indicator and the switches are the same as those used in the standard model. For instruments without flow indication, the scale ratio between min. and max. range values is 1:2.5. A scale ratio of 1:4 is possible if required by the two limit switches. For instruments with flow indication, the scale ratio is 1:4. For vertical installation, the position of the installation and the flow direction should have been indicated in the order for calibration in order to take the weight of the disc into account. 36 Installation and operating instructions DW 181 - 184 Appendix A: Declaration of conformity: CE Installation and operating instructions DW 181 - 184 37 Appendix B: If you need to return a device for testing or repair to KROHNE If installed and operated in accordance with these operating instructions, your device will rarely present any problems. Should you nevertheless need to return a device for checkout or repair, please pay strict attention to the following points: Due to statutory regulations concerning protection of the environment and the health and safety of our personnel, KROHNE may only handle, test and repair returned flow meters that have been in contact with liquids if it is possible to do so without risk to personnel and environment. This means that KROHNE can only service your unit if it is accompanied by a certificate in line with the following model confirming that the flow meter is safe to handle. If the unit has been operated with toxic, caustic, flammable or water-endangering liquids, you are kindly requested • to check and make sure, if necessary by rinsing or neutralizing, that all cavities are free from such dangerous substances. (Directions on how you can find out whether the unit has to be opened and then flushed out or neutralized are obtainable from KROHNE on request.) • to enclose a certificate with the level gauge confirming that it is safe to handle and stating the liquid used. KROHNE regrets that it cannot service your flow meter unless accompanied by such a certificate. Specimen certificate Company: Address: Department: Name: Tel. No.: The enclosed flow meter, Type: KROHNE Order No. or Series No.: has been operated with the following liquid: Because this liquid is water-endangering toxic caustic flammable we have checked that all cavities in the unit are free from such substances flushed out and neutralized all cavities in the unit We confirm that there is no risk to man or environment through any residual liquid contained in this flow meter. Date: Signature: Company stamp: 38 Installation and operating instructions DW 181 - 184 Note Installation and operating instructions DW 181 - 184 39


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