Types 1098-EGR and 1098H-EGR Pressure Reducing Regulators

Bulletin 71.2:1098-EGR

D10

0143

X01

2

January 2016

www.fisherregulators.com

Types 1098-EGR and 1098H-EGR Pressure Reducing Regulators

Differentialaslowas1 psi / 70 mbar

QuickChangeTrimPackage

OptionalNoiseAbatement Trim (Up to 30dBA reduction)

In-Service Travel Inspection

NPS1through12x6/ DN25through 300x150BodySizes Available

Aqueous TrimPackages(ApplicationSpecific)

W6956

NoAtmosphericBleed

EasyTopEntryIn-LineMaintenance

MaterialsofConstructionCompatiblewithBelowGrade Installations

StainlessSteelConstructionforCorrosiveEnvironmentsandOxygenService

Figure 1. Types 1098-EGR Pressure Reducing Regulator

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BodySizesandEndConnectionStyles See Table 1MainValveMaximumInletPressure(1) 400 psig / 27.6 bar or body rating limit

whichever is lowerMaximumPilotSupplyPressure(1)(2) 600 psig / 41.4 barOutletPressureRanges See Table 2MaximumandMinimumDifferentialPressures See Table 4ActuatorSizesandMaximumPressures See Table 3Pressure Registration ExternalTemperatureCapabilities(1) Nitrile(NBR): -20 to 180F / -29 to 82C Fluorocarbon(FKM): 0 to 300F / -18 to 149C, except water is limited to 0 to 200F / -18 to 93C Ethylenepropylene(EPR): -20 to 275F / -29 to 135COptions NACEConstruction MonitorConfiguration BoilerFuelConstruction Aqueous(Liquid)ServiceConstruction NoiseAbatementTrim

1.Thepressure/temperaturelimitsinthisBulletinoranyapplicablestandardlimitationshouldnotbeexceeded.2.Forstabilityoroverpressureprotection,areducingregulatormaybeinstalledupstreamofthepilotaccordingtotheInstallationsection.

SpecificationsTheSpecificationssectionlistspressurelimitationsandotherspecificationsforvariousTypes1098-EGRand1098H-EGRconstructions.Specificationsforagivenregulatorasitoriginallycomesfromthefactoryarestampedonnameplateslocatedonboththeactuatorandmainvalvebody,whilethepilotcontrolspringrangeisdisplayedonthepilotspringcaseandthepilotrestrictioncodeisstampedonthepilotbody(S=standardgain,L=lowgainandH=highgain).Todeterminemaximumpressureratings,theindividualratingsforthemainvalve,actuatorandpilotmustallbeconsidered.

PortDiametersandTravels

BODYSIZE PORTDIAMETERTRAVEL

Standard RestrictedIn. mm

NPS DN In. mm In. mm PercentageofFlowCapacity

1 25 1-5/16 33.3 3/4 19 - - - - - - - - - - - -

2 50 2-3/8 60.3 1-1/8 2930 3/8 9.5

70 5/8 16

3 80 3-3/8 85.7 1-1/2 38 40 7/8 22

4 100 4-3/8 111

2 51

40 1 256 150

7-3/16 1838 x 6 and

12 x 6

200 x 150 and

300 x 150

- - - - - - - -

ConstructionMaterials Main Valve Body and Body Flange: Cast iron,

WCCSteel,CF8MStainlesssteel Cage:CF8MStainlesssteel(Linear),416or316

Stainlesssteel(WhisperTrim)orhardenedENCcoatedCastiron(QuickOpening)

Seat Ring and Valve Plug: Hardened 416 Stainless steel or 316 Stainless steel

Travel Indicator Assembly: Steel or Stainless steel exceptplasticforindicatorscale

Piston Ring:Polytetrafluoroethylene(PTFE) O-rings and Soft Parts:Nitrile(NBR) (standard),

Fluorocarbon(FKM)orEthylenepropylene(EPR) Spring:SteelorInconel X-750 Bolting: Steel, Stainless steel

- continued -

InconelisamarkownedbySpecialMetalsCorporation.

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Specifications(continued)

ConstructionMaterials(continued) Actuator Bonnet: Zinc-plated Steel or 304 Stainless steel Diaphragm Case: Steel or Stainless steel Bolting: Steel, Stainless steel Diaphragm Plate: Cast iron, 316 or

WCC Stainless steel Stem Guide: Stainless steel Diaphragm and O-rings: Nitrile(NBR)(standard),

Fluorocarbon(FKM),Ethylenepropylene(EPDM) Stem: 17-4 PH Stainless steel (standard) or

316 Stainless steel Pilot Mounting Parts Tubing and Connector Fittings: Steel (standard) or

Stainless steel Pipe Bushing:Malleableiron,Stainlesssteel Pipe Nipples:Galvanizedsteel,Stainlesssteel Type6351Pilot Body, Body Plug and Spring Case:Aluminum Valve Plug Stem:Brass(standard) or Stainless steel Diaphragm, O-rings and Gaskets:Nitrile(NBR)

(standard)orFluorocarbon(FKM) Type6352,6353,6354L,6354Mor6354HPilot Body, Body Plug, Spring Case and Closing Cap: Aluminum(standard) or Stainless steel Diaphragm:Nitrile(NBR),Fluorocarbon(FKM)or

Ethylenepropylene(EPR) Types 6354M and 6354H Diaphragm

Limiter: Aluminum O-rings and Soft Parts:Nitrile(NBR)(standard) or

Fluorocarbon(FKM) Filter:Brass(TypeP594-1standard)orAluminum

(TypeP593-1),exceptcelluloseforfilterelement 61SeriesPilots Body and Spring Case: Cast iron Upper and Lower Diaphragm: Nitrile(NBR),

Neoprene(CR)orFluorocarbon(FKM) Composition Seats:Nitrile(NBR)or

Fluorocarbon(FKM) O-rings:Nitrile(NBR)orFluorocarbon(FKM)

TypeY600AMPilot Body, Spring Case and Lower Casing: Cast iron Diaphragm:Nitrile(NBR) Composition Seats:Nitrile(NBR) Trim:Aluminum Pilot and Actuator Vents Type Y602 vent assembly

ApproximateWeights(WithStandard Single-PilotConstruction) Type 1098 Actuator Size30 NPS 1 / DN 25 Body: 55lbs/25kg NPS 2 / DN 50 Body: 75lbs/34kg NPS 3 / DN 80 Body: 115lbs/52kg NPS 4 / DN 100 Body: 165lbs/75kg NPS 6 / DN 150 Body: 350lbs/159kg NPS 8 x 6 / DN 200 x 150 Body: 625lbs/284kg NPS 12 x 6 / DN 300 x 150 Body: 1102lbs/500kg Size40(Standard) NPS 1 / DN 25 Body:65lbs/29kg NPS 2 / DN 50 Body: 85lbs/39kg NPS 3 / DN 80 Body: 125lbs/57kg NPS 4 / DN 100 Body: 175lbs/79kg NPS 6 / DN 150 Body: 360lbs/163kg NPS 8 x 6 / DN 200 x 150 Body: 635lbs/288kg NPS 12 x 6 / DN 300 x 150 Body: 1112 lbs/504kg Size70 NPS 1 / DN 25 Body:140lbs/64kg NPS 2 / DN 50 Body: 160lbs/73kg NPS 3 / DN 80 Body: 200lbs/91kg NPS 4 / DN 100 Body: 250lbs/113kg NPS 6 / DN 150 Body: 435lbs/197kg NPS 8 x 6 / DN 200 x 150 Body: 710lbs/322kg NPS 12 x 6 / DN 300 x 150 Body: 1187 lbs/538kg Type1098HSize30Actuator NPS 1 / DN 25 Body: 80lbs/36kg NPS 2 / DN 50 Body: 100lbs/45kg NPS 3 / DN 80 Body: 140lbs/64kg NPS 4 / DN 100 Body: 190lbs/86kg NPS 6 / DN 150 Body: 375lbs/170kg NPS 8 x 6 / DN 200 x 150 Body: 650lbs/295kg NPS 12 x 6 / DN 300 x 150 Body: 1127 lbs/511kg

Table 1. Body Sizes and End Connection Styles

BODYSIZECASTIRON STEELORSTAINLESSSTEEL

NPS DN

1 or 2 25 or 50 NPT,CL125FForCL250RF NPT,CL150RF,CL300RF,CL600RF,BWE,SWEorPN16/25/40

3, 4 or 6 80, 100 or 150 CL125FForCL250RF CL150RF,CL300RF,CL600RF,BWEorPN16/25/40

8 x 6 or 12 x 6 200 x 150 or 300 x 150 - - - - CL150RF,CL300RF,CL600RForBWE

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IntroductionTheTypes1098-EGRand1098H-EGRregulatorsprovideeconomicalandaccuratepressurecontrolinawidevarietyofapplications:naturalgasdistributionsystems;fuelgassupplytoindustrialboilers,furnaces,ovensandmixers;andlargecommercial/industrialestablishmentssuchasshoppingcentersandschools.Theyarealsousedinplantairserviceandinliquidservicewhereaslowstrokingtime(approximately30to90seconds)isdesiredon both opening and closing the main valve.

Thesuperiorperformanceofthisregulatorisduetotheamplifyingeffectofthepilotandthetwo-pathcontrolsystem.Changesinoutletpressureactquicklyontheactuatordiaphragmtoprovidefastresponsetosystemchanges.Then,thepilotamplifiesanysmallsystemchangestopositionthemainvalveforprecisepressurecontrol.

Bubble-tightshutoffisachievedutilizingknife-edgedseatsinthevalveplug.Whentheregulatorisintheclosedposition,theknife-edgedseatsmakeagas-tightsealagainsttheupperandlower(port)valveseal.Avarietyofcagesareofferedforstandard,speedofresponseandnoiseapplications.Thecage-guidedmetalplugprovidessuperiorcontrolandstability.

PrincipleofOperationThepilot-operatedTypes1098-EGRand1098H-EGRregulatorsbothuseinletpressureastheoperatingmedium,whichisreducedthroughpilotoperationtoloadtheactuatordiaphragm.Outletordownstreampressureopposesloadingpressureintheactuatorandalsoopposesthepilotcontrolspring.TheType1098-EGRregulatoroperationschematicisshowninFigure2.

Inoperation,assumethatoutletpressureisbelowthepilotcontrolsetting.Controlspringforceonthepilotdiaphragmthusopensthepilotvalveplug,providingadditionalloadingpressuretotheactuatordiaphragm.Thisloadingpressureforcestheactuatorstemupward,openingthemainvalveplugviaabumpconnection.Theupwardmotionoftheplugallowsgastoflowthroughthecageintothe downstream system.

Whendownstreamdemandhasbeensatisfied,outletpressuretendstoincrease,actingonthepilotandactuatordiaphragms.Thispressureexceedsthepilotcontrol spring setting, moving the pilot diaphragm away andlettingthevalveplugspring(Type6351,61SeriesorTypeY600AMpilots)orbellows(Types6352through6354Mpilots)closethepilotvalveplug(unbalancedintheType6351or61SeriespilotsbutbalancedintheTypes6352through6354Mpilots).Excessloading

TYPE1098-EGRWITH6350SERIESPILOT

A6563

TYPE6351TYPE1098-EGR

TYPES6352,6353,6354

INLETPRESSUREOUTLETPRESSURELOADINGPRESSUREATMOSPHERICPRESSURE

Figure 2. Operational Schematics

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TYPE1098-EGRWITHTYPE61LDPILOT

Figure 2. Operational Schematics (continued)

TYPE1098-EGR

TYPE1806

A6641TYPE61LD

INLETPRESSUREOUTLETPRESSURELOADINGPRESSUREATMOSPHERICPRESSURE

TYPE1098-EGRWITHTYPEY600AMPILOTANDTYPEMR95HPRESSURESUPPLYREGULATOR

TYPEMR95H

TYPEY600AM

FIXEDRESTRICTOR

OPTIONAL:TYPE112RESTRICTOR

INLETPRESSUREOUTLETPRESSUREATMOSPHERICPRESSURELOADINGPRESSUREPILOTSUPPLYPRESSURE

M1008

TYPE1098-EGR

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pressureontheactuatordiaphragmescapesdownstreamthroughthebleedhole(Type6351pilot),bleedorifice(61Seriespilot),restriction(Types6352through 6354Mpilots)orfixedrestrictor(TypeY600AMpilot).

Reducedactuatorloadingpressurepermitsthemainvalvetoclose.Thecombinationofmainvalvespringforceandvalveplug