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ASCO Solenoid Valves3/2 NCSERIES551 - 553single/dual solenoid (mono/bistable function) - pilot operatedaluminium body - 1/4” and 1/2” tapped212Features3 1 The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version)have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels: SIL 2 forHFT 0 / SIL 3 for HFT 1 The spool valves 3/2 NC have threaded port connections All the exhaust ports of the spool valve are connectable, providing better environmentalprotection. Particularly recommended for sensitive areas, such as clean rooms, andapplications in the pharmaceutical and food processing sectors The valves offer environmental protection against the ingress of liquids, dusts or otherforeign matter (environmentally-protected construction) Can be externally piloted (external air pilot supply) to convert valve to zero minimumoperation by flipping a gasket The solenoid valves satisfy all relevant EU directivesGeneral103 12 - 10,4 bar [1 bar 100 kPa]1/4 860 l/min (ANR)1/2 3800 l/minDifferential pressureFlow (Qv at 6 bar)fluids ( )air, inert gas, filtered212temperature range (TS)seal materials ( )NBR (nitrile) PUR (polyurethane)-25 C to 60 CMaterials in contact with fluid( ) Ensure that the compatibility of the fluids in contact with the materials is verifiedBodyAluminium, black anodisedEnd cover (spring return)Glass-filled PASpool valve internal partsZamak, stainless steel, POM, aluminiumPilot internal partsRefer to specific solenoid catalogue pagesPilot end coversAluminiumCore tubeStainless steelCore and plugnutStainless steelCore springStainless steelSealsNBRTop discPADisc holderCACartridge (low power)Welded, stainless steel or aluminiumSeatBrassSeat insertCAShading coilCopperRider rings (low power)PTFE (NF/WSNF solenoids only)BPRP - MPLPULP0,5W - 1W1W - 2,5WNotavailable10,5W 11,2WUltra LowpowerLowpowerReduced andMedium powerBasicpowerPOWER LEVELS - cold electrical holding values (watt)Specificationspipesizeorificesize( )(mm)operating pressuredifferential (bar)max. (PS)min.(1)air ( )(m3/h) (l/min) flowcoefficientKvprefix optional solenoidspowerlevel NEMAATEX / IECEx7&9Ex dbEx eb mb Ex mbEx ia / EMPVLI WSLIEF (2) LPKF NFIP65basiccataloguenumberSCSolenoid air pilot operated - spring return mlmmlmlm-llll-llll-lmlm-mm- Select 8 for NPT ANSI 1.20.3 or select G for ISO G (228/1) Available feature Available feature in DC only. - Not available(1)(2)(3)Zero minimum is only achieved if external pressure is applied.UL CSACertified IEC 61508 Functional Safety data, use suffix "SL".Visit our website at www.emerson.com/ascomm-llll- 551B405 (3) 551H405 (3) 551B305 (3) 551G305 (3) 551B305 (3) 551H305 (3) 553A405 (3) 553H405 (3) 553A305 (3) 553G305 (3) 553A305 (3) 553H305 1

3/2 NCSERIES551 - 553Specificationspipesizeorificesize( )(mm)operating pressuredifferential (bar)max. (PS)min. (1)air ( )(m3/h) (l/min) prefix optional solenoidspowerlevel NEMAATEX / IECEx7&9Ex dbEx eb mb Ex mbEx ia / EMPVLI WSLIEF (2) LPKF oid air pilot operated and return lm-mm- Select 8 for NPT ANSI 1.20.3 or select G for ISO G (228/1) Available feature Available feature in DC only. - Not availableZero minimum is only achieved if external pressure is applied.(2)prefixProduct selection guidepower leveldescription1 2 3 4 5 6 7ULPExplosionproof - NEMA 7, 9 - Zinc plated steel conduitE Fm(18” continuous leads)mE F H TEF (18” continuous leads) high temperaturemE F H T LEF high temperature 72" continuous leadsmE F LEF 72" continuous leadsmJ B E FEF Junction box (conduit in 1/2" NPT)J B E F M FEF Junction box (conduit in 1/2" NPT) surge suppression coils mmJ C E FEF Junction box (conduit in 3/4" NPT)J C E F H TEF Junction box (conduit in 3/4" NPT) high temperature mE MWaterproof IP66/67 - Metal enclosure (EN/IEC 60079-7,-18 and -31)* E TThreaded conduit/hole (M20 x 1,5)mL P K FFlameproof - Aluminium (EN/IEC 60079-1, 60079-31)*N FFlameproof - Aluminium (EN/IEC 60079-1, 60079-31)*P VEncapsulated epoxy moulded (EN/IEC 60079-18)*S CSolenoid with spade plug connector (EN/IEC 60730)W PWaterproof IP67 - Metal enclosureL II.S. with Aluminium IP66/IP67 enclosure (EN/IEC 60079-11 31)* mW SWaterproof IP67 - 316 SS enclosuremW S L P K FFlameproof 316L SS (EN/IEC 60079-1, 60079-31)*W S E MWaterproof IP66/67 - 316 SS enclosure (EN/IEC 60079-0 7 18 31)* W SL II.S. with 316L SS IP66/IP67 enclosure (EN/IEC 60079-11 31)* mW S N FFlameproof 316L SS (EN/IEC 60079-1, 60079-31)*TThreaded conduit (1/2" NPT)H TClass H - High temperature, 80 C ambient temp.X Other special constructions-LP MP x tabledescription1 2 3 4 5 6 7M OPush type manual operatorS LCertified IEC 61508 Functional Safety data (2)Options & M5 Available featureG34600418 (3)34600419 (3)34600479 (3)-power levelSTEP 1Select basic catalogue number, includingpipe thread indentification letter. Referto the specifications table on page: 1or 2Example: G551A405STEP 2Select prefix (combination). Refer to thespecifications table and the prefix table,respect the indicated power level.Example: EMSTEP 3Select suffix (combination) if required.Refer to the suffix table, respect theindicated power level.Example: MOSTEP 4Select voltage. Refer to standard voltageson page: 3Example: 230V / 50HzSTEP 5Final catalogue / ordering number.Example:EM G551A405MO 230 V / 50 HzULP LP MP BP / - l / - lOrdering examples valves:SCSCSCSCHTLPKFLIEMEFexhaust protector(stainless steel)NPT(M)34600482 (3)34600483 (3)34600479 (3)34600484 (3) Available feature in DC only- Not available* ATEX/IECEx valves using these solenoids are approved according toEN ISO 80079-36 (2016) and EN ISO 80079-37 (2016) [non electrical](2)Not to use with MO suffix(3)Provided with "SL" suffix2 551B406 551H406 551B306 551G306 551B306 551H306 553A406 553H406 553A306 553G306 553A306 553H306UL CSAPrefix tablesuffixllll-prefixpipe threadbasic numberVisit our website at www.emerson.com/ascoGGG8GG8G551 B 405551 B 405551 B 406551 B 406551 B 305553 A 305553 A 406551 H 405230V / 50 HzSL 230V / 50 HzMO 230V / 50 HzMO 230V / 50 HzMO 24V / DC24V / DCMO 230V / 50 HzMO 240V / 60 Hzvoltagesuffix80050GB-2019/R04(1)mm-

3/2 NCSERIES551 - 553Explanation of temperature ranges of solenoid valvesThe valve temperature range (TS) is determined by the selected seal material, the temperaturerange for proper operation of the valve and sometimes by the fluid (e.g. steam)The operator ambient temperature range is determined by the selected power level and thesafety codeThe temperature range of the complete solenoid valve is determined by the limitations of bothtemperature ranges aboveValve temperature rangeOperator ambient temperature rangeTotal temperature rangeElectrical characteristicsCoil insulation classElectrical safetyStandard voltagesFIEC 335DC ( ) 24V - 48VAC ( ) 24V - 48V - 115V - 230V(1)/50Hz; other voltages and 60Hz are available on requestoperatorambienttemperaturerange (TS)(C )(2)power ratingsprefixoptioninrush holding hot/cold (VA) (VA) (W)(W)Basic power 555555555555555555232323232323232323safety codeelectricalenclosureprotection(EN 60529)replacement coil / kit 230 V/50 Hz 1,2-40 to 75-40 to 75-60 to 25/40/60-60 to 40/60/75-40 to 40-40 to 65-40 to 52/40-40 to 52/40-40 to 52/40-40 to 52/40EN 60730IP65, moulded 400425-117 400425-142EN 60730IP67, steel /SS400405-117 400405-142II2G Ex db IIC Gb T6/T5/T4, II2D Ex tb IIIC Db IP66/67, alu./SS 400405-117II2G Ex db IIC Gb T6/T5/T4, II2D Ex tb IIIC Db IP66/67, alu./SS400405-142II2G Ex eb mb IIC Gb T3, II2D Ex tb IIIC Db IP66/67, steel /SS 400909-117 400913-142-(4)-(4)II2G Ex mb IIC Gb T3( )/T4( ), II2D Ex mb IIIC Db IP67, mouldedNEMA type 7 and 9NEMA 4XNEMA type 7 and 9NEMA 4XNEMA type 7 and 9NEMA 4XNEMA type 7 and 9NEMA 4X-01030202030405051111SC1,5 1,5 1,5WP/WS1,5 1,5 1,5LPKF/WSLPKF2,4 2,4 2,4LPKF/WSLPKFNF/WSNF1,85 1,85 1,85EM/WSEM1,5 1,5 1,5PVEFEFHTJBEFJBEFHT-1,7/1,71,7/1,72,1 ,8-40 to 60-40 to 60-40 to 40/65/80-40 to 40/80-60 to 75/80-40 to 40/55-40 to 65-40 to 60-40 to 60-40 to 60-40 to 60EN 60730IP65, moulded 400925-097 400925-042EN 60730IP67, steel /SS400926-097 400926-042II2G Ex db IIB H2 Gb T6/T5/T4, II2D Ex tb IIIC Db IP66/67, alu./SS- (4)- (4)(4)II2G Ex db IIB H2 Gb T6/T4, II2D Ex tb IIIC Db IP66/67, alu./SS- (4)(4)(1)II2G Ex db IIC Gb T6/T5, II2D Ex tb IIIC Db IP66/67, alu./SS- (4)II2G Ex eb mb IIC Gb T6/T5, II2D Ex tb IIIC Db IP66/67, steel /SS- (4)- (4)II2G Ex mb IIC Gb T6, II2D Ex mb IIIC Db IP67, moulded- (4)NEMA type 7 and 9NEMA 4XNEMA type 7 and 9NEMA 4XNEMA type 7 and 9NEMA 4XNEMA type 7 and 9NEMA 4X-0608121207080910101111Low Power (LP)Ultra Low Power (ULP)LPKF/WSLPKFEFEFHTJBEFJBEFHTLI (6) (7)WSLI (6) (7)prefixoption---0,5/0,5 40 to 60-40 to 52/40-40 to 52/40-40 to 52/40-40 to 52/40-40 to 60-40 to 60-- (4)- (4)- (4)12101011111313(WS)NF: Low Power, 230 V AC does not exist. Maximum voltage in AC is 115 VTemperature range can be limited by sealings(3) Refer to the dimensional drawings on pages: 5 to 8(4) Multiple coil kits are available under ATEX/IECEx, contact us(5)LPKF/WSLPKF: 24 V DC (0,5 W)(6) LI/WSLI: Check the electrical characteristics in the corresponding catalogue pages(7) LI/WSLI: Ultra Low Power, 24 V DC only (LI: For use in zone 0 locations, see the installationconditions given in the I&M instructions)- Not available(2)UI /R0232IP66/67, alu./SSNEMA 4XNEMA 4XNEMA 4XNEMA 4XIP66/67, alu.IP66/67, SS(1)safety parametersUltra Low Power (ULP)LI/WSLIII2G Ex db IIB H2 Gb T6, II2D Ex tb IIIC DbNEMA type 7 and 9NEMA type 7 and 9NEMA type 7 and 9NEMA type 7 and 9II1G Ex ia IIC T6 Ga, II2D Ex tb IIIC Db (7)II1G Ex ia IIC T6 Ga, II2D Ex tb IIIC Db (7)Visit our website at www.emerson.com/asco3

3/2 NCSERIES551 - 553Electrical connectionsprefixconnectionSCWP, WS, EM, WSEMNF, WSNF, LPKF, WSLPKFPVLI, WSLIEFJBEFSpade plug connector with cable gland EN175301-803A (ISO 4400) for cables with an outer diameter from 6 to 10 mmM20 plastics cable gland for cables with an outer diameter from 7 to 12 mm.1/2" NPT threaded cable entry. Enclosures are supplied without cable glandMoulded-in cable, standard length 2 m1/2" NPT threaded cable entry. Enclosures are supplied without cable gland1/2" NPT conduitsEF Junction boxAdditional options Valves configured for external pilot air supply, TPL 20547 Other pipe threads are available on request Ex mb (prefix "PV") solenoid can be supplied with various cable lengthsInstallation80050GB-2019/R02 Multi language installation/maintenance instructions are included with each valve The solenoid valves can be mounted in any position without affecting operation Do not connect the pressure supply to the exhaust port 3. The “environmentally-protected” construction is not adapted for a“distributing” function or use in NO function. Contact us for functions available in specific versions IEC 61508 Functional Safety (suffix SL). Check temperature range of valve body and solenoid for suitability. For probability offailure, contact us It is necessary to connect pipes or fittings to the exhaust ports to protect the internal parts of the spool valve and its pneumaticoperator if used outside or in harsh environments (dusts, liquids etc.) Threaded pipe connection identifier is 8 NPT (ANSI 1.20.3); G G (ISO 228/1) Ex db Prefix "NF/WSNF" enclosure is provided with a 1/2" NPT threaded entry hole, M20 x 1,5 (prefix "ET") is optional. These aresupplied without cable gland4Visit our website at www.emerson.com/asco

3/2 NCSERIES551 - 553Dimensions (mm), Weight (kg)69,527,5 3 21/813 x 1/43332 45 34,5551 Series2319,512,1A80131,5171A 2 mounting holes: 5,3 mm dia.;Spotfacing: 9 mm dia., depth 5 mm4440,2 553 Series3213 x 1/2 (553)1/896,516B 312,292,6 (553)72,3 51 2B 2 mounting holes: 6,5 mm dia.;Spotfacing: 11 mm dia., depth 6 mm119,4 (553)152,5198TYPE 01:TYPE 02:Epoxy mouldedSC: IEC 335 / ISO 4400Aluminium, epoxy coated / AISI 316L SSNF / WSNF: EN/IEC 60079-1, 60079-31551B405 / B406 / B405MO / B406MO553A405 / A406 / A405MO / A406MO551B405 / B406 / B405MO / B406MO553A405 / A406 / A405MO / A406MO61/8360 89381AB39D1AEVisit our website at www.emerson.com/asco248B541025680050GB-2019/R02C90 C1/2NPT360 5

3/2 NCSERIES551 - 553Dimensions (mm), Weight (kg)TYPE 03:TYPE 04:Metal, epoxy coated / AISI 316L SSWP / WS: IEC 335EM / WSEM: EN/IEC 60079-7 18 31Epoxy encapsulatedPV: EN/IEC 60079-18551B405 / B406 / B405MO / B406MO553A405 / A406 / A405MO / A406MO551B405 / B406 / B405MO / B406MO552A405 / A406 / A405MO / A406MO1/81/84360 CC360 383981A383982B1DATYPE 05:TYPE 06:Epoxy mouldedSC: IEC 335 / ISO 4400Epoxy encapsulatedEF: NEMA type 7, 9 / ICS-6 ANSI553H405 / H406 / H405MO / H406MO551B305 / B306 / B305MO / B306MO553A305 / A306 / A305MO / A306MOC 45 131/8 NPT61/88360 C360 90 318946EB120DA52EB391DAEBTYPE 07:TYPE 08:Aluminium, epoxy coated / AISI 316L SSNF / WSNF: EN/IEC 60079-1, 60079-31Metal, epoxy coated / AISI 316L SSWP / WS: IEC 335EM / WSEM: EN/IEC 60079-7 18 31551B305 / B306 / B305MO / B306MO553A305 / A306 / A305MO / A306MO551B305 / B306 / B305MO / B306MO553A305 / A306 / A305MO / A306MO1/8 NPT4360 3981A48BC254102391A56Visit our website at www.emerson.com/asco38B8212080050GB-2019/R0286360 C1/2NPT

3/2 NCSERIES551 - 553DIMENSIONS (mm), WEIGHT (kg)TYPE 09:TYPE 10:Epoxy encapsulatedPV: EN/IEC 60079-18Epoxy encapsulatedEF: NEMA type 7, 9 / ICS-6 ANSI551B305 / B306 / B305MO / B306MO553A305 / A306 / A305MO / A306MO551G305 / H305 / G306 / H306 / G305MO / H305MO / G306MO / H306MO553G305 / H305 / G306 / H306 / G305MO / H305MO / G306MO / H306MO1/8 NPT"ET" (M20x1,5)"T" (1/2 NPT)1/8360 CC360 3839318DA3946DAEB152EBTYPE 11:TYPE 12:Epoxy encapsulatedJBEF: NEMA type 7, 9Aluminium, cataphorese black painting / AISI 316L SSLPKF/WSLPKF: EN/IEC 60079-1, 60079-31551G305 / H305 / G306 / H306 / G305MO / H305MO / G306MO / H306MO553G305 / H305 / G306 / H306 / G305MO / H305MO / G306MO / H306MO551B305 / B306 / B305MO / B306MO553A305 / A306 / A305MO / A306MO1/8 NPT1/82C88331199360 C1/2NPT360 151EDABA6335B9830TYPE 13:Aluminium, cataphorese black painting / AISI 316L SSLI / WSLI: EN/IEC 60079-11, 60079-31551B305 / B306 / B305MO / B306MO553A305 / A306 / A305MO / A306MO1/8 NPT1/2NPT4C360 3916335AB9830Visit our website at www.emerson.com/asco80050GB-2019/R0287

3/2 NCSERIES551 - 553Dimensions (mm), Weight (kg)23468Ex d certified cable gland (on request)Three-core cable, length 2 mCable gland for unarmoured cable with 7 to 12 mm dia. sheathConnector rotatable by 90 increments, cable Ø 6 - 10 mmManual operator location, suffix MOExternal pilot air supply, 1/8 pipe sizeConnectable pilot exhaust portNon-connectable pilot exhaust port9(1)type prefix/optionApower level55101020303040506070809101112121313(1)SCNF / WSNFWP/WS(WS)EMPVEFSCNF / 32 152,5 170BP158 197,3 224BP148 169,2 204BP148 169,2 204BP132 152,5 172BP132,5 156 173LP132,5 153,5 173LP158 197,3 224LP148 169,2 204LP132 152,5 172LP132,5 156 173BP / LP / ULP 153,5 174,5 215LP / ULP141 164,5 192LP / ULP141 164,5 192ULP141 164,5 192ULP141 164,5 55155386,5 100,267,5 81,274,5 88,287,5 101,267,5 81,274,5 88,2176 2,142,882,213,282,223,42Incl. coil(s) and connector(s).Accessoriesø14BB1/8 NPT1/4 NPTø14ØAØAØAB1/8NPTpilot exhaust protectorpart number276405-0018pilot top exhaust low power(ASCO solenoid interface)M5 1/8 1/4 3/8 1/24,5 10 11 11 14exhaust protector(stainless steel)Visit our website at www.emerson.com/ascoAvailability, design and specifications are subject to change without notice. All rights reserved.80050GB-2019/R0220

Features Them onostables poolv alves inc onformity withI EC 61508 Standard(2010 route 2. H. v ersion) have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels