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1800B2 and 1800B2-HC Series Service Regulators02 Elster American MeterThe 1800B2 Series pressure regulators are designed to control natural gas,air, nitrogen, carbon dioxide, propane vapor, and other non-corrosive gasesin residential, light commercial, and small industrial applications.General InformationOutlet pressures between 3.5" W.C.and 2 PSIG are available. Operatingtemperature range is -20°F to 150°F(-30°C to 65°C). Maximum flow rateis 2500 SCFH (70.8 m 3 /h).All models conform to ANSI Code B109.4-1998, and CGA Service-Type RegulatorSpecification CAN/CGA-6.18-M95.Features• Variety of interchangeable orificesand spring ranges• 90 Degree (Right Angle), 180 Degree(Straight-Flow), or Offset Valve Body(See photo on next page)• Wide range of valve bodyconnection sizesOptionsVent ElbowThe regulator vent opening should facedownward (6 o'clock) to minimize thechance of blockage from ice and snow.If not possible, a 3/4" NPT plastic, 90˚vent elbow (part number 78041P025) andseparate protective screen (part number70400P017) may be screwed into the ventto provide the necessary protection.Elevation CompensationThe E.C. orifice is recommended forinstallations where the inlet pressuremay vary over a wide range. The E.C.orifice is available in two sizes: 1/8" x3/16" and 3/16". The capacities of theseorifices are the same as the standardorifice of the same size.ApplicationsModel Number1803B21803B2-HCFull Capacity Relief ValveFull capacity relief valve standardon some models. (See PerformanceGraphs on page 10)SplashguardsUV stabilized, weather-resistant, resindevice that protects the vent screen fromsplashes while providing a large externalvent opening to keep regulators workingproperly.DescriptionBasic regulator, non-relieving with 3/4" or 1" NPT vent.Basic regulator, non-relieving with 3/4" or 1" NPT vent.1813B2 Basic regulator with full-capacity internal relief with 3/4"or 1" NPT vent.1813B2-HC Basic regulator with full-capacity internal relief with 3/4"or 1" NPT vent.1823B21833B21843B21843B2-HC1843B2-L1853B21883B21883B2-HC1893B21853B2 w/USSA1853B2-HC w/USSA1893B2 w/USSA1893B2-HC w/USSABasic regulator, non-relieving with under-pressure shut-offand 3/4" or 1" NPT vent.Basic regulator with full-capacity internal relief and underpressureshut-off and 3/4" or 1" NPT vent.Basic regulator with full-capacity internal relief and overpressureshut-off and 3/4" or 1" NPT vent.Basic regulator with full-capacity internal relief and overpressureshut-off and 3/4" or 1" NPT vent.Basic regulator with limited relief and overpressure shut-off and3/4" or 1" NPT vent.Basic regulator with full-capacity internal relief and overpressure,underpressure shut-off and 3/4" or 1" NPT vent.Basic regulator, non-relieving with overpressure shut-offand 3/4" or 1" NPT vent.Basic regulator, non-relieving with overpressure shut-offand 3/4" or 1" NPT vent.Basic regulator, non-relieving with overpressure, underpressureshut-off and 3/4" or 1" NPT vent.Basic regulator with full-capacity internal relief and overpressure,underpressure shut-off and 3/4" or 1" NPT vent.Basic regulator with full-capacity internal relief and overpressure,underpressure shut-off and 3/4" or 1" NPT vent.Basic regulator, non-relieving with overpressure, underpressureshut-off and 3/4" or 1" NPT vent.Basic regulator, non-relieving with overpressure, underpressureshut-off and 3/4" or 1" NPT vent.Safety Shutoff DevicesOverpressure Shutoff (OPSO) — Operatesindependently. The OPSO will shut offthe gas supply in the event of a seriousdownstream pressure build-up. Theseare available in two pressure ranges onthe Models 1843B2, 1843B2-HC, 1843B-L,1853B2, 1883B2, 1883B2-HC, and 1893B2.Spring RangePart Number14" W.C. to 35" W.C. 71403P0051 PSIG to 3 1/2 PSIG 71403P004

1800B2 and 1800B2-HC Series Service Regulators03 Elster American MeterWhen the outlet pressure exceeds theOPSO set point, the pressure under theOPSO diaphragm plate (A) compressesthe pressure spring (B) forcing thediaphragm stem (E) upwards andreleasing plunger (D). This permits theshut-off spring (F) to force the shut-offdisc (G) against the back side of thespecial double-ended orifice.EDCA OPSO Diaphragm Plate B Pressure SpringC Cap D PlungerE Diaphragm Stem F Shut-off SpringG Shut-off Disc H Adjusting ScrewUnderpressure Shutoff (UPSO) —The 1823B2, 1833B2, 1853B2, and the1893B2 regulators come equipped withan underpressure shutoff (UPSO) devicewhich utilizes a spring loaded valve stemand o-ring assembly within an orificebody. It will shut off gas flow throughthe regulator in the event of an upstreamunderpressure condition.UPSO in the Open positionUnder normal operating conditions,gas flows through the orifice fromthe high pressure upstream to the lowpressure downstream. If conditionsshould change to cause the upstreampressure to decrease, the plunger andseat disk assembly will move awayfrom the orifice thereby opening upthe regulator to compensate for thelower inlet pressure. The spring in theUnderpressure Shutoff will push the valvestem assembly up against the face ofthe seat disk. Eventually the valve stem’so-ring will make contact with the innerwall of the orifice and completely shutoff the gas flow.HBAFGUPSO in the Closed positionWhen the inlet underpressure conditionhas been corrected or repaired, the UPSOmust be manually reset to allow gas flow.Reset is done by unscrewing the sealplug and pulling up on the diaphragmstem. This will open the UnderpressureShutoff and allow gas to flow.ABSeal PlugThis type of design allows servicemaintenance to be performed todownstream appliances beforepressure is introduced, i.e. lightingthe pilot light, closing valves, etc.In some cases downstream failuremay result in the regulator shutting off.Excessive flow may result in a decreasein downstream pressure which opensthe seat disk away from the orifice untilthe Underpressure Shutoff takes overand shuts the regulator off.The design has been tested and meetscapacity requirements, while insuringefficient and reliable resetting operationeven at sub-zero temperatures.Capacities of the UnderpressureShutoff orifice:ADiaphragm StemSet Point: 7” W.C.Inlet Pressure: 20 PSIGSet at 50 cubic feet per hourMaximum inlet pressure rating of 60 PSIGApplicable to ¾”, 1”, and 1 ¼” valve bodiesBInlet Pressure (PSIG)Spring RangePart Number7.5 - 24“ W.C. 70017P12320 - 32” W.C. 70017P12424 - 44” W.C. 70017P12540 - 84” W.C. 70017P1263 - 5 PSIG 70017P1274 - 7 PSIG 70017P128Spring RangeFlow Rate (SCFH)3 3005 40010 60015 75020 90030 100040 130060 1500Universal Safety Shutoff Assembly(USSA) — USSA protects the downstreampiping from both over- and under-pressureconditions by shutting off the gas flow atthe inlet side of the regulator orifice. BothOver- and under-pressure shut-off setpoints are adjustable.USSA Shutoff Spring RangesOver Pressure Spring RangesUnder Pressure Spring RangesPart Number3 - 6“ W.C. 70017P1336 - 24” W.C. 70017P13424 - 60” W.C. 70017P135Pressure Taps1/8" NPT taps are available on mostvalve heads.Offset Valve Body

1800B2 and 1800B2-HC Series Service Regulators04 Elster American Meter9211165 14134 311215101787 6Material Specifications1 Diaphragm Case - Precision die-castaluminum with an exclusive sevenstepadvanced conversion coating,single-coat polyester primer andhigh solids polyurethane top coat.2 Valve Body - Cast grey iron,undercoated, single coat polyesterprimer and high solids polyurethanetop coat. NPT threads meet ANSI/ASME B1.20.1.Available sizes: 3/4” x 3/4”, 3/4” x 1”,3/4” x 1-1/4”, 1” x 1”, 1” x 1-1/4” and1-1/4” x 1-1/4” NPT or BSP-TROffset valve body: 3/4” x 3/4”,3/4” x 1” and 1” x 1” NPT or BSP-TR3 Pressure Spring - Steel, zinc platedand yellow chromate. Color codedfor identification.OutletPressureColorCodePartNumber3.5" to 6" W.C. Blue 70017P0433.5" to 7.5" W.C. Tan 70017P0895.5" to 8.5" W.C. Yellow 70017P0446" to 12" W.C. Brown 70017P1376" to 15" W.C. Purple 70017P04212" to 28" W.C. White 70017P06024" to 48" W.C. Red 70017P08242" W.C. to 2 PSIG Red - Red 70017P0494 Diaphragm Plate - Steel,Electrogalvanized.5 Diaphragm - Nylon fabric reinforcedBuna N.6 Seat Disc - Buna N; 60, 70 (std.)or 80 durometer rating.7 Orifice Valve - High strength,corrosion resistant aluminum.OrificeSizeStandardPartNumberPart Numberwith OPSO9/16" 72494P026 72751P0191/2" 72494P025 72751P0163/8" 72494P023 72751P0145/16" 72494P022 72751P013UPSO 71422G004 71422G0041/4" 72494P021 72751P0123/16" 72494P020 72751P0111/8" x 3/16" 72494P030 72751P0201/8" 72494P019 N/A8 Lever - Steel, zinc plated andyellow chromate.9 Seal Plug - Minlon.10 Plunger Guide - Minlon.11 Pressure Adjustment Screw - Minlon.12 Relief Valve Stem - Celcon withsteel, zinc plated and yellowchromate insert.13 Vent Screen - Stainless Steel -All models are designed with aremovable weather and bug-proofstainless steel screen to resistfreeze-ups and to exclude foreignmatter. The vent is threaded ¾” or1” NPT (BSP-TR threads available).A vent line can be added to carrygas away to a safe outside locationand away from any opening(s) inthe building. Comply with applicableFederal, State, and local codes.14 Vent Valve - Stainless Steel withElectrogalvanized steel retainer.15 Relief Valve Spring - Steel, zincplated and yellow chromate.Adjustable. Color coded foridentification. Standard set pointof 8” W.C. above outlet set pressureof 7” W.C. Standard set point of 1.1PSIG above outlet set pressure of2 PSIG.16 Relief Valve Adjustment Nut -Brass, sintered.

1800B2 and 1800B2-HC Series Service Regulators05 Elster American Meter1800B2 Regulator Capacity Performance3/4" OutletSet Point 7.0" W.C.at 50 SCFHSCFH (m 3 /h) 0.60 specific gravitygas at 60°F and 14.7 PSIA. Pressurespring 70017P044. Outlet pressurevariance not to exceed +2" -1" W.C.from set point, horizontal position.1800B2 Series Regulator Capacity SCFH (m 3 /h)InletPSIG(bar)1(0.07)2(0.14)3(0.21)5(0.34)10(0.70)15(1.00)20(1.40)30(2.10)40(2.80)60(4.10)100(6.90)125(8.60)1/8" x 3/16"Orifice—150(4.2)200(5.7)250(7.1)350(9.9)425(12.0)500(14.2)650(18.4)800(22.7)1100(31.2)1700(48.1)2000(56.6)3/16"Orifice150(4.2)225(6.4)300(8.5)400(11.3)600(17.0)900(25.5)1100(31.2)1400(39.6)1800(51.0)2200(62.3)2400(68.0)1/4"Orifice175(5.0)275(7.8)375(10.6)500(14.2)850(24.1)1100(31.2)1400(39.6)1800(51.0)2200(62.3)2500(70.8)2500(70.8)5/16"Orifice250(7.1)375(10.6)425(12.0)600(17.0)1000(28.3)1500(42.5)1600(45.3)2100(59.5)2400(68.0)2500(70.8)3/8"Orifice300(8.5)400(11.3)500(14.2)700(19.8)1200(34.0)1500(42.5)1800(51.0)2100(59.5)2500(70.8)1/2"Orifice350(9.9)475(13.4)550(15.6)800(22.7)1300(36.8)1500(42.5)1800(51.0)2100(59.5)9/16"Orifice350(9.9)475(13.4)600(17.0)1000(28.3)1400(39.6)1600(45.3)1900(53.8)—— —— — —— — — —— — — — — —For optimum performance, maximum inlet pressure should not exceed maximum capacity rating for any givenorifice size.1" OutletSet Point 7.0" W.C.at 50 SCFHSCFH (m 3 /h) 0.60 specific gravitygas at 60°F and 14.7 PSIA. Pressurespring 70017P044. Outlet pressurevariance not to exceed +2" -1" W.C.from set point, horizontal position.1800B2 Series Regulator Capacity SCFH (m 3 /h)InletPSIG(bar)1(0.07)2(0.14)3(0.21)5(0.34)10(0.70)15(1.00)20(1.40)30(2.10)40(2.80)60(4.10)100(6.90)125(8.60)1/8" x 3/16"Orifice—175(5.0)200(5.7)275(7.8)350(9.9)425(12.0)500(14.2)650(18.4)800(22.7)1100(31.2)1700(48.1)2000(56.6)3/16"Orifice150(4.2)250(7.1)325(9.2)425(12.0)650(18.4)900(25.5)1100(31.2)1400(39.6)1800(51.0)2400(68.0)2500(70.8)1/4"Orifice200(5.7)350(9.9)400(11.3)550(15.6)900(25.5)1200(34.0)1600(45.3)2000(56.6)2500(70.8)2500(70.8)2500(70.8)5/16"Orifice250(7.1)375(10.6)425(12.0)600(17.0)1000(28.3)1500(42.5)1800(51.0)2500(70.8)2500(70.8)2500(70.8)3/8"Orifice300(8.5)400(11.3)500(14.2)700(19.8)1400(39.6)1800(51.0)2300(65.1)2500(70.8)2500(70.8)2500(70.8)1/2"Orifice350(9.9)475(13.4)550(15.6)1000(28.3)1500(42.5)2100(59.5)2500(70.8)2500(70.8)2500(70.8)9/16"Orifice350(9.9)475(13.4)600(17.0)1000(28.3)1800(51.0)2400(68.0)2500(70.8)——— —— — — —— — — — — —For optimum performance, maximum inlet pressure should not exceed maximum capacity rating for any givenorifice size.

1800B2 and 1800B2-HC Series Service Regulators06 Elster American Meter1800B2 Regulator Capacity Performance1-1/4" OutletSet Point 7.0" W.C.at 50 SCFHSCFH (m 3 /h) 0.60 specific gravitygas at 60°F and 14.7 PSIA. Pressurespring 70017P044. Outlet pressurevariance not to exceed +2" -1" W.C.from set point, horizontal position.1800B2 Series Regulator Capacity SCFH (m 3 /h)InletPSIG(bar)1(0.07)2(0.14)3(0.21)5(0.34)10(0.70)15(1.00)20(1.40)30(2.10)40(2.80)60(4.10)100(6.90)1/8" x 3/16"Orifice—175(5.0)225(6.4)275(7.8)375(10.6)450(12.7)500(14.2)650(18.4)800(22.7)1100(31.2)1700(48.1)3/16"Orifice150(4.2)250(7.1)325(9.2)475(13.4)800(22.7)1000(28.3)1200(34.0)1600(45.3)1900(53.8)1/4"Orifice200(5.7)350(9.9)475(13.4)750(21.2)1500(42.5)1800(51.0)2100(59.5)2500(70.8)5/16"Orifice275(7.8)475(13.4)550(15.6)1000(28.3)2200(62.3)2500(70.8)2500(70.8)3/8"Orifice350(9.9)500(14.2)700(19.8)1200(34.0)2500(70.8)2500(70.8)2500(70.8)1/2"Orifice400(11.3)650(18.4)1000(28.3)2000(56.6)2500(70.8)2500(70.8)9/16"Orifice400(11.3)900(25.5)1500(42.5)2500(70.8)2500(70.8)2500(70.8)— —— — — —— — — — —— — — — — —— — — — — —For optimum performance, maximum inlet pressure should not exceed maximum capacity rating for any givenorifice size.3/4" OutletSet Point 2 PSIGat 50 SCFHSCFH (m 3 /h) 0.60 specific gravitygas at 60°F and 14.7 PSIA. Pressurespring 70017P049. Outlet pressurevariance not to exceed +/- 10%from set point, horizontal position.1800B2 Series Regulator Capacity SCFH (m 3 /h)InletPSIG(bar)3(0.21)5(0.34)10(0.70)15(1.00)20(1.40)30(2.10)40(2.80)60(4.10)100(6.90)125(8.60)1/8" x 3/16"Orifice—200(5.7)325(9.2)425(12.0)500(14.2)600(17.0)750(21.2)1100(31.2)1600(45.3)2000(56.6)3/16"Orifice200(5.7)300(8.5)450(12.7)600(17.0)750(21.2)950(26.9)1200(34.0)1600(45.3)2200(62.3)1/4"Orifice225(6.4)375(10.6)600(17.0)800(22.7)1000(28.3)1300(36.8)1600(45.3)2100(59.5)2500(70.8)5/16"Orifice275(7.8)475(13.4)750(21.2)1000(28.3)1200(34.0)1600(45.3)1900(53.8)2300(65.1)3/8"Orifice300(8.5)475(13.4)800(22.7)1000(28.3)1300(36.8)1700(48.1)2100(59.5)2500(70.8)1/2"Orifice375(10.6)600(17.0)1100(31.2)1400(39.6)1600(45.3)2300(65.1)2500(70.8)9/16"Orifice450(12.7)700(19.8)1200(34.0)1500(42.5)1800(51.0)——— —— — — —— — — — — —For optimum performance, maximum inlet pressure should not exceed maximum capacity rating for any givenorifice size.

1800B2 and 1800B2-HC Series Service Regulators07 Elster American Meter1800B2 Regulator Capacity Performance1" OutletSet Point 2 PSIGat 50 SCFHSCFH (m 3 /h) 0.60 specific gravitygas at 60°F and 14.7 PSIA. Pressurespring 70017P049. Outlet pressurevariance not to exceed +/- 10%from set point, horizontal position.1800B2 Series Regulator Capacity SCFH (m 3 /h)InletPSIG(bar)3(0.21)5(0.34)10(0.70)15(1.00)20(1.40)30(2.10)40(2.80)60(4.10)100(6.90)125(8.60)1/8" x 3/16"Orifice—200(5.7)350(9.9)425(12.0)500(14.2)650(18.4)800(22.7)1100(31.2)1600(45.3)2000(56.6)3/16"Orifice200(5.7)300(8.5)475(13.4)650(18.4)800(22.7)1000(28.3)1300(36.8)2100(59.5)2500(70.8)1/4"Orifice225(6.4)375(10.6)600(17.0)850(24.1)1100(31.2)1500(42.5)1900(53.8)2500(70.8)2500(70.8)5/16"Orifice275(7.8)475(13.4)750(21.2)1000(28.3)1300(36.8)1800(51.0)2400(68.0)2500(70.8)3/8"Orifice300(8.5)475(13.4)850(24.1)1100(31.2)1400(39.6)2000(56.6)2500(70.8)2500(70.8)1/2"Orifice375(10.6)600(17.0)1200(34.0)1500(42.5)2000(56.6)2500(70.8)2500(70.8)9/16"Orifice450(12.7)700(19.8)1300(36.8)1700(48.1)2300(65.1)——— —— — — —— — — — — —For optimum performance, maximum inlet pressure should not exceed maximum capacity rating for any givenorifice size.1-1/4" OutletSet Point 2 PSIGat 50 SCFHSCFH (m 3 /h) 0.60 specific gravitygas at 60°F and 14.7 PSIA. Pressurespring 70017P049. Outlet pressurevariance not to exceed +/- 10%from set point, horizontal position.1800B2 Series Regulator Capacity SCFH (m 3 /h)InletPSIG(bar)3(0.21)5(0.34)10(0.70)15(1.00)20(1.40)30(2.10)40(2.80)60(4.10)100(6.90)125(8.60)1/8" x 3/16"Orifice—200(5.7)350(9.9)425(12.0)500(14.2)650(18.4)800(22.7)1100(31.2)1700(48.1)2100(59.5)3/16"Orifice200(5.7)300(8.5)500(14.2)650(18.4)850(24.1)1100(31.2)1500(42.5)2400(68.0)2500(70.8)1/4"Orifice225(6.4)375(10.6)600(17.0)850(24.1)1100(31.2)1600(45.3)2200(62.3)2500(70.8)2500(70.8)5/16"Orifice275(7.8)475(13.4)750(21.2)1100(31.2)1400(39.6)2300(65.1)2500(70.8)2500(70.8)3/8"Orifice300(8.5)500(14.2)950(26.9)1300(36.8)1700(48.1)2500(70.8)2500(70.8)2500(70.8)1/2"Orifice375(10.6)600(17.0)1200(34.0)1800(51.0)2400(68.0)2500(70.8)2500(70.8)9/16"Orifice450(12.7)750(21.2)1400(39.6)2100(59.5)2500(70.8)——— —— — — —— — — — — —For optimum performance, maximum inlet pressure should not exceed maximum capacity rating for any givenorifice size.

1800B2 and 1800B2-HC Series Service Regulators09 Elster American Meter1800B2 and 1800B2-HC Series ServiceRegulators - Other Technical DataFull-Open RegulatorRelief CapacityFor sizing downstream relief valves,use the following formulas to determinethe regulator full-open capacity:Critical flow ratesQ = 0.5 C xP 1√GOrificeSub-critical flows√PQ = C x 2 h√GCritical flow occurs when the absoluteoutlet pressure is less than about 1/2of the absolute inlet pressure.QCP 1P 2hGMaximum capacity of regulatorOrifice constant (see table below)Inlet absolute pressure (PSIA)Outlet absolute pressure (PSIA)Differential pressureSpecific gravity of gasOrifice ConstantsC1/8" 251/8" x 3/16" 253/16" 571/4" 985/16" 1493/8" 2081/2" 3539/16" 421Maximum RecommendedInlet PressureOrifice SizeInlet Pressure (PSIG)9/16" 201/2" 403/8" 1005/16" 1101/4" 1253/16" 1251/8" x 3/16" 1251/8" 125This is the maximum inlet the regulator should operateat to insure complete lockup at no-flow conditions.Other Gas CapacitiesTo determine the capacity of these regulators for gases other than natural gas, multiplythe values within the capacity tables by a Specific Gravity Conversion Factor (F g). Thetable below lists this factor for some of the more common gases.Gas Type Specific Gravity Conversion Factor (F g )Air 1.00 0.77Butane 2.01 0.55Carbon Dioxide 1.52 0.63Nitrogen 0.97 0.79Propane 1.53 0.63To calculate the Conversion Factor for other gases:(F g) =√Specific gravity of gas on which the capacity table is basedSpecific gravity of gas being usedExample: If using propane and only having tables based on natural gas,the Specific Gravity Conversion Factor is:(F g) =√(F g) =√ 0.601.53(F g) = 0.626Specific gravity of natural gas (0.6)Specific gravity of propane (1.53)Regulator Pressure Rating125 PSIG (8.6 bar) = Maximum recommended inlet pressure for normal service.Maximum recommended pressure may vary with orifice size.175 PSIG (12 bar) = Maximum inlet pressure for abnormal or emergency service,without causing damage to regulator case.2 PSIG (138 mbar) = Maximum outlet pressure for normal service.10 PSIG (689 mbar) = Maximum outlet pressure which can be contained by pressurecarrying components (no flange leakage to atmosphere except for normal relief action).If regulator is subjected to these conditions, it should be removed from service.50 PSIG (3.5 bar) = Maximum outlet pressure for abnormal service without damage tointernal components. If regulator is subjected to these conditions, it should be removedfrom service.

1800B2 and 1800B2-HC Series Service Regulators10 Elster American Meter1800B2 and 1800B2-HC Service RegulatorsRegulator Relief Valve PerformanceThere are several methods of measuring the relief performance of a regulator.The worst case scenario will occur when the lever is disconnected. The datapresented in the tables below represent this condition.Outlet Pressure Relative to Inlet Pressure3/4" Screened Vent – No Vent Pipe Set Pressure 7" W.C.Outlet Pressure - Inches W.C. (mbar)90(224)80(199)70(174)60(149)50(124)40(100)30(75)20(50)10(25)00 10 20 30 40 50 60 70 80 90 100 110 120 130(.7) (1.4) (2.1) (2.8) (3.4) (4.1) (4.8) (5.5) (6.2) (6.9) (7.6) (8.3) (9.0)Inlet Pressure - PSIG (bar)9/16” 3/8” 1/4” 1/8“ x 3/16”1/2” 5/16” 3/16”1" Screened Vent – No Vent Pipe Set Pressure 7" W.C.Outlet Pressure - Inches W.C. (mbar)90(224)80(199)70(174)60(149)50(124)40(100)30(75)20(50)10(25)00 10 20 30 40 50 60 70 80 90 100 110 120 130(.7) (1.4) (2.1) (2.8) (3.4) (4.1) (4.8) (5.5) (6.2) (6.9) (7.6) (8.3) (9.0)Inlet Pressure - PSIG (bar)9/16” 3/8” 1/4” 1/8“ x 3/16”1/2” 5/16” 3/16”3/4" Screened Vent – No Vent Pipe Set Pressure 2 PSIGOutlet Pressure - Inches W.C. (mbar)9(.62)8(.55)7(.48)6(.41)5(.34)4(.26)3(.21)2(.14)1(.07)00 10 20 30 40 50 60 70 80 90 100 110 120 130(.7) (1.4) (2.1) (2.8) (3.4) (4.1) (4.8) (5.5) (6.2) (6.9) (7.6) (8.3) (9.0)Inlet Pressure - PSIG (bar)9/16” 3/8” 1/4” 1/8“ x 3/16”1/2” 5/16” 3/16”1" Screened Vent – No Vent Pipe Set Pressure 2 PSIGOutlet Pressure - Inches W.C. (mbar)9(.62)8(.55)7(.48)6(.41)5(.34)4(.26)3(.21)2(.14)1(.07)00 10 20 30 40 50 60 70 80 90 100 110 120 130(.7) (1.4) (2.1) (2.8) (3.4) (4.1) (4.8) (5.5) (6.2) (6.9) (7.6) (8.3) (9.0)Inlet Pressure - PSIG (bar)9/16” 3/8” 1/4” 1/8“ x 3/16”1/2” 5/16” 3/16”

1800B2 and 1800B2-HC Series Service Regulators11 Elster American Meter1843B2-L Regulator with Limited ReliefThe 1843B2-L has a limited relief feature that reducesthe amount of gas released to the atmosphere.General InformationLimited Relief is accomplished byinstalling a relief restriction cup insidethe diaphragm assembly of the 1843B2regulator. The 1843B2-L regulator utilizesoverpressure protection as part of itsassembly, which will shut off the gasin the event of over pressure condition.Full Relief Diaphragm AssemblyFlow Through VentFlow (SCFH)30002750250022502000175015001250100075050025000.5 0.7 0.9 1 1.1 1.2 1.4 1.5 1.6 2 2.5 3 3.5 4 4.5 5 5.5 6 6.4 6.5Outlet (PSIG)Limited ReliefStandard IRVFlow Through Vent - Enlarged View of Tinted Area14001200Limited Relief Diaphragm AssemblyUnder regulator lockup conditions, anincrease in gas temperature or very smallgas leakage through the orifice can raisethe outlet gas pressure. The limited reliefwill release this small increase in outletpressure to atmosphere without the OPSOtripping. But should the outlet pressurecontinue to increase for some reason,then the OPSO will shut off and closeoff the gas flow.3/8" O/D minimum pipe size isrecommended should the reliefconnection require piping to a safelocation. Care must be taken to preventwater from closing off or entering intothe vent opening. Any kind of blockageof the vent or vent pipe must be prevented.To the right is a graphical representationof the difference of gas flow betweena standard relief valve and a limitedrelief valve.Flow (SCFH)100080060040020000.5 0.7 0.9 1 1.1Outlet (PSIG)Limited Relief Standard IRV

1800B2 and 1800B2-HC Series Service Regulators12 Elster American Meter1800B2 and 1800B2-HC SeriesService Regulator DimensionsModel 1803B2, 1803B2-HC, 1813B2 and 1813B2-HC 90°Model 1803B2, 1803B2-HC, 1813B2 and 1813B2-HC 90°CFCFModel D1803B2, 1803B2-HC, 1813B2 and 1813B2-HC 90°DEEDAABBCFModel 1803B2, 1803B2-HC, 1813B2, and 1813B2-HC - 90°Inlet Outlet A B C Model 1823B2 D and 1833B2 E - 180° F3/4" 3/4" 1-9/16" 8-7/8" D7-1/4"4-1/8" 2" 3-5/8"39.7mm 225.4mm 184.2mm 104.8mm 50.8mm CD92.1mmF3/4" 1" 1-9/16" 8-7/8" 7-1/4" 4-1/8" 2" 3-5/8"39.7mm 225.4mm 184.2mm 104.8mm 50.8mm 92.1mm1" 1" 1-9/16"39.7mm8-7/8"225.4mmE 7-1/4"184.2mmEDAModel 1823B2 and 1833B2 - 180°Model 1823B2 and 1833B2C- 180°C FFA4-1/8"104.8mmBB2"50.8mm3-5/8"92.1mmEABModel 1803B2, 1803B2-HC, 1813B2 and 1813B2-HC 180°Model 1803B2, 1803B2-HC, 1813B2 andC1813B2-HC 180°CFFModel 1803B2, D 1803B2-HC, 1813B2 and 1813B2-HC 180°DCFEED ABABEABModel 1803B2 and 1813B2 - OffsetModel 1803B2 and 1813B2C- OffsetCFFDDEEDEModel 1803B2 and 1813B2 - OffsetCFABAB7-1/4"E 184.2mmED7-1/4"184.2mm7-1/4" A184.2mm A7-1/4"E184.2mmModel A 1823B2 and 1833B2 B - OffsetModel 1823B2 and 1833B2 C - OffsetFCFModel 1803B2, 1803B2-HC, 1813B2, and 1813B2-HC - 180°Model 1823B2 and 1833B2 - OffsetInlet Outlet A B D C D E F3/4" 3/4" 1" 8-7/8" DC7-1/4" 4-1/8" 2" 3-5/8"F25.4mm 225.4mm 184.2mm 104.8mm 50.8mm 92.1mm3/4" 1" 1"25.4mm1" 1" 1"25.4mm1" 1-1/4" 1-1/8"28.6mm1-1/4" 1-1/4" 1-1/8"28.6mm3/4" 1-1/4" 1-1/8"28.6mm8-7/8"225.4mm8-7/8"225.4mm8-7/8"225.4mm8-7/8"225.4mmModel 1803B2 and 1813B2 - Offset2"50.8mmB 2"B 50.8mm2"50.8mm8-7/8" 7-1/4" 4-1/8" 2" 3-5/8"225.4mm Model 184.2mm 1843B2, 1843B2-HC, 104.8mm 1883B2 50.8mm and 1883B2-HC 92.1mmABModel 1843B2, 1843B2-HC, 1883B2 and 1883B2-HCD4-1/8"104.8mm4-1/8"104.8mm4-1/8"104.8mm4-1/8"104.8mm2"50.8mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mmDCInlet Outlet A B C D E F F3/4" 3/4" 1"E8-7/8" 7-1/4" 4-1/8" 2"25.4mm E225.4mm184.2mm 104.8mm 50.8mmD AB3/4" 1" 1" 8-7/8" 7-1/4" 4-1/8" 2"25.4mm 225.4mm A 184.2mm 104.8mm B 50.8mm1" 1" 1"25.4mm8-7/8"225.4mm EECC FModel 1843B2, 1843B2-HC, 1883B2 and 1883B2-HC F7-1/4"184.2mm4-1/8"104.8mm2"50.8mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mmDABModel 1823B2 and 1833B2 - 90°Model 1823B2 and 1833B2 - 90°CCModel 1823B2 and 1833B2 - 90°CFFDDAModel 1853B2 and B 1893B2Model 1853B2 and 1893B2CFCFModel 1853B2 and 1893B2CF

D1800B2 and 1800B2-HC Series Service RegulatorsE13 Elster American MeterEAB1800B2 and 1800B2-HC SeriesService Regulator DimensionsAModel 1853B2 and 1893B2BModel 1823B2 and 1833B2 - 90°CFModel 1823B2 and 1833B2 - 90°CFDEInlet Outlet ADB C D E F3/4" 3/4" 1-9/16" 8-7/8" 7-1/4" 5-1/8" 2" 3-5/8"39.7mm 225.4mm 184.2mm 130.2mm 50.8mm 92.1mm3/4" 1" 1-9/16"39.7mm1" 1" 1-9/16"39.7mm8-7/8"225.4mmE8-7/8"225.4mm7-1/4"184.2mm7-1/4"184.2mmA5-1/8"130.2mm5-1/8"130.2mm2"50.8mm2"50.8mmB3-5/8"92.1mm3-5/8"92.1mmABDDEEModel 1823B2 and 1833B2 - 180°CFModel 1823B2 and 1833B2 - 180°CFABABModel 1823B2 and 1833B2 - OffsetModel 1823B2 and 1833B2 - 180°Inlet Outlet A B C D E F3/4" 3/4" 1"25.4mm3/4" 1" 1"25.4mm1" 1" 1"25.4mm1" 1-1/4" 1-1/8"28.6mm1-1/4" 1-1/4" 1-1/8"28.6mm3/4" 1-1/4" 1-1/8"28.6mm8-7/8"225.4mm8-7/8"225.4mm8-7/8"225.4mm8-7/8"225.4mm8-7/8"225.4mm8-7/8"225.4mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm5-1/8"130.2mm5-1/8"130.2mm5-1/8"130.2mm5-1/8"130.2mm5-1/8"130.2mm5-1/8"130.2mm2"50.8mm2"50.8mm2"50.8mm2"50.8mm2"50.8mm2"50.8mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mmDCFModel 1823B2 and 1833B2 - OffsetCFModel 1823B2 and 1833B2 - OffsetInlet Outlet A B C D E FDE3/4" 3/4" 1"25.4mm3/4" 1" 1"25.4mm8-7/8"225.4mm8-7/8"225.4mm7-1/4"184.2mm7-1/4"184.2mm5-1/8"130.2mm5-1/8"130.2mm2"50.8mm2"50.8mm3-5/8"92.1mm3-5/8"92.1mmEAB1" 1" 1"25.4mm8-7/8"225.4mm7-1/4"184.2mm5-1/8"130.2mm2"50.8mm3-5/8"92.1mmABModel 1843B2, 1843B2-HC, 1883B2 and 1883B2-HCCModel 1843B2, 1843B2-HC, 1883B2 and 1883B2-HCF

ABF1800B2 and 1800B2-HC Series Service Regulators14 Elster American MeterDModel 1823B2 and 1833B2 - OffsetFE1800B2 and 1800B2-HC SeriesD ABService Regulator DimensionsEModel 1843B2, 1843B2-HC, 1883B2 and 1883B2-HCCDEDEABCFModel 1843B2, 1843B2-HC, 1883B2 and 1883B2-HCCFABModel 1853B2 and 1893B2Model 1843B2, 1843B2-HC, 1883B2 and 1883B2-HCInlet Outlet A B C D E F3/4" 3/4" 4-1/2"114.3mm3/4" 1" 4-1/2"114.3mm1" 1" 4-1/2"114.3mm1" 1-1/4" 4-1/2"114.3mm1-1/4" 1-1/4" 4-1/2"114.3mm8-15/16"227.0mm8-15/16"227.0mm8-15/16"227.0mm8-15/16"227.0mm8-15/16"227.0mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm4-1/8"104.8mm4-1/8"104.8mm4-1/8"104.8mm4-1/8"104.8mm4-1/8"104.8mm2"50.8mm2"50.8mm2"50.8mm2"50.8mm2"50.8mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mmABCFDModel 1853B2 and 1893B2EDABCFModel 1853B2 and 1893B2Inlet Outlet A B C D E F3/4" 3/4" 4-1/2"114.3mm8-15/16"227.0mm7-1/4"184.2mm5-1/8"130.2mm2"50.8mm3-5/8"92.1mmEAB3/4" 1" 4-1/2"114.3mm1" 1" 4-1/2"114.3mm1" 1-1/4" 4-1/2"114.3mm8-15/16"227.0mm8-15/16"227.0mm8-15/16"227.0mm7-1/4"184.2mm7-1/4"184.2mm7-1/4"184.2mm5-1/8"130.2mm5-1/8"130.2mm5-1/8"130.2mm2"50.8mm2"50.8mm2"50.8mm3-5/8"92.1mm3-5/8"92.1mm3-5/8"92.1mm1-1/4" 1-1/4" 4-1/2"114.3mm8-15/16"227.0mm7-1/4"184.2mm5-1/8"130.2mm2"50.8mm3-5/8"92.1mm

1800B2 and 1800B2-HC Series Service Regulators15 Elster American MeterRegulator Assembly Positions180° ModelsValve Head Position "A"Valve Head Position "B"2213134StandardVent Position4StandardVent PositionValve Head Position "C"3421StandardVent Position90° ModelsValve Head Position "A"124StandardVent PositionValve Head Position "C"124Offset ModelsValve Head Position "D"33StandardVent PositionValve Head Position "D"3124StandardVent PositionValve Head Position "B"4213StandardVent PositionValve Head Position "D"1243VENTStandardVent PositionAC-250 Meter with 1813B2 RegulatorExample of RegulatorAssembly PositionIn the photo above the 1813B2 Regulatorshown has an 180 degree valve head inPosition "C" (Flow upward) with the vent inposition 2 (Looking down). This would beassembly position C2.Ordering Information1 Model number2 Size of inlet and outlet3 Inlet pressure, PSIG (bar)4 Outlet pressure, inches W.C.(mbar) or PSIG (bar)5 Flow, SCFH (m3/h)6 Kind and specific gravity of gas7 Orifice size8 Regulator assembly positionnumber9 Possible variation in inlet pressurefor E.C. Orifice modelsMaximum ___ PSIG (bar)Minimum ___ PSIG (bar)Shipping Weight17.5 lbs/carton of four regulators1423StandardVent Position

About Elster GroupA world leader in advanced meteringinfrastructure, integrated metering, andutilization solutions to the gas, electricityand water industries, Elster’s systemsand solutions reflect over 170 years ofknowledge and experience in measuringprecious resources and energy.Elster provides solutions and advancedtechnologies to help utilities more easily,efficiently and reliably obtain and useadvanced metering intelligence toimprove customer service, enhanceoperational efficiency, and increaserevenues. Elster's AMI solutions enableutilities to cost-effectively generate, deliver,manage, and conserve the life-essentialresources of gas, electricity, and water.Elster has over 7500 staff andoperations in 38 countries in Northand South America, Europe, and Asia.Elster American Meter2221 Industrial RoadNebraska City, NE 68410USAT +1 402 873 8200F +1 402 873 7616www.elster-americanmeter.comElster Canadian Meter275 Industrial RoadCambridge, OntarioN3H 4R7CanadaT +1 519 650 1900F +1 519 650 1917www.elster-canadianmeter.com© 2008 Elster American Meter. All rights reserved.Information contained herein is subject to changewithout notice. Product specifications may change.Contact your Elster American Meter representativefor the most current product information. Printed inthe United States.EAM-TB8510.8-EN-P - April 2008Supersedes SB 8510.7, TDB-8620.2 and TDB-8622.1