Pneu-HydroProductsPneu-HydroProductshaslongbeenale*gmanufacturerofpneumaticandhydraulicvalvesandsystemsfortheaircraftandmissileindustry.Morerecently,Pneu-Hydrohasalsopioneeredinthedesignandfabricationofarapidlygrowinglineofindustrialvalvesforhydraulic,pneumatic,andspecializedfuelapplications,especiallyasappliedtoautomatedproductionequipmentandprecisionmachineryofalltypes.Typicalcommercialproductsincludeco*olvalves,regulators,checkvalves,reliefvalves,filters,andactuators.Withcompletelyintegrateddevelopment,engineering,testing,andmanufacturingfacilities,Pneu-Hydrocanmeetyourmostexactingspecifications.Inmany*esexistingdesignscanbeappliedquicklytoyourrequirementswithaspeedthatrivalsoff-the-shelfdelivery.Allourfacilitiesandexperienceareatyourdis*al.Feelfreetocallonustodiscussyourproblem.InlineReliefValvesPneu-Hydrobarstockreliefvalvesremainbubble-tightuptocrackingpressure.Theyresealatlessthan10%dropfromcrackingpressureinlowerranges,andlessthan5%athigherranges.Crackingpressureisreliable,repeatableandeasilysetbyaninternaladjustment,whichis*per-proofoncethevalveisinstalledinthesystem.AnO-ringsealsthepoppetwhileametallicstopbearsthespringload.Thissimpledesignprovidescrispsettingsandlonglife.Thestandardvalveisconstructedof316stainlesssteelforstrengthanddurabilityinthemostcorrosiveapplications.SpecificationsOperatingpressureranges 401series50to3,000psid402series4,000to10,000psidOperatingtemperatureranges Buna-Nseals-40°to250°F(-40°to121°C)Vitonseals-20°to450°F(-29°to232°C)OrderingInformationModelNumberPipeSizeLengthHexCvPressureRangeDash#401F4Q-1,21/4NPTFemale315/16.650–250psid-1401F6Q-1,23/8NPTFemale4-1/41-3/81.3250–600psid-2401F8Q-1,21/2NPTFemale4-39/641-3/81.3500–1,750psid-3401M4Q-1,21/4NPTMale3-1/215/16.61,500–3,000psid-4402F4Q-21/4NPTFemale4-1/21-3/8.64,000–10,000psidN/A402F8Q-21/2NPTFemale4-43/641-3/8.64,000–10,000psidN/A1Dashnumberfordesiredpressurerangemustbeinserted.2Buna-Nisstandardelastomerandrequiresnocode.ForViton,insert“V”.Consultfactoryforothermaterials.Forexample,ModelNo.401F4Q-2Vspecifiesaninlinereliefvalvewith1/4NPTfemaleports,VitonO-rings,anda250–600psidrange. MiniatureReliefValvesPneu-Hydrominiaturereliefvalvesprovidezeroleakageuptocrackingpressure.Theyresealbubble-tightwithin5%to10%ofcrackingpressure.Adjustmentsareinsensitivetotemperaturevariations.Theseminiaturereliefvalvesaremadefrom316stainlesssteelforstrengthandcorrosionresistance.Materialoptionscanbeprovidedonrequest.Buna-NorVitonO-ringsarestandardbutotherO-ringmaterialscanbeprovided.Back-pressureonthe405and407series(withconnectedventline)shouldbelimitedto1,000psid.SpecificationsOperatingpressureranges 404and405series50to5,000psid406and407series5,000to13,000psidCv.035Operatingtemperatureranges Buna-Nseals-40°to250°F(-40°to121°C)Vitonseals-20°to450°F(-29°to232°C)OrderingInformationPressureRangeVenttoAtmosphere1/4NPTVentConnectionBuna-NVitonBuna-NViton50–100psid404M4Q-10404M4Q-10V405M4Q-10405M4Q-10V100–150psid404M4Q-1404M4Q-1V405M4Q-1405M4Q-1V150–250psid404M4Q-2404M4Q-2V405M4Q-2405M4Q-2V250–350psid404M4Q-3404M4Q-3V405M4Q-3405M4Q-3V350–600psid404M4Q-4404M4Q-4V405M4Q-4405M4Q-4V600–900psid404M4Q-5404M4Q-5V405M4Q-5405M4Q-5V900–1,500psid404M4Q-6404M4Q-6V405M4Q-6405M4Q-6V1,500–3,000psid404M4Q-7404M4Q-7V405M4Q-7405M4Q-7V3,000–5,000psid404M4Q-8404M4Q-8V405M4Q-8405M4Q-8V5,000–13,000psid406M4Q406M4Q-V407M4Q407M4Q-VNotes:Materialandconnectionoptionsarealso*ailable.Consultfactory.Optionalmaterialsincludebrassandaluminum.OptionalconnectionsincludeMS-33656-4. RightAngleReliefValvesPneu-Hydrorightanglereliefvalvesarepressurebalancedinternallyandpressurereferencedtoatmosphere.Thisyieldsinsensitivitytodownstreampressureandpermitsthevalvetobeusedasaback-pressureregulator.Thevalvesealsagainstasoftseatandhasametalstopthatbearsthespringload,prolongsseallife,andpreventssticking.Thesevalvesremainbubble-tightuptocrackingpressureandresealbubble-tightatlessthan10%dropfromcrackingpressure(significantlylessinthehigherpressureranges).Theexternalsettingadjustmentisparticularlyusefulinapplicationswherechangesarerequired.Thedesignprovidesfullflowataverysmallriseabovecrackingpressure.Featuresincludeawideseriesof*ailablepressureranges,smooth,chatter-freeperformance,reliableandrepeatablecrackingandreseatingpressures,alongwith316stainlesssteelconstruction.Sealmaterialselectionsare*ailableforcompatibilitywithvirtuallyanyfluidchemistry.StandardsealmaterialsareBuna-NandViton.SpecificationsOperatingpressureranges Proofpressure20,000psigBurstpressure40,000psigminimumOperatingtemperatureranges Buna-Nseals-40°to250°F(-40°to121°C)Vitonseals-20°to450°F(-29°to232°C)OrderingInformationPressureRangeMaleInletandFemaleOutletMaleInletandOutletCvBuna-NVitonBuna-NViton100–150psid408M4F4Q-1408M4F4Q-1V408M4Q-1408M4Q-1V.25150–250psid408M4F4Q-2408M4F4Q-2V4048M4Q-2408M4Q-2V250–350psid408M4F4Q-3408M4F4Q-3V408M4Q-3408M4Q-3V350–600psid408M4F4Q-4408M4F4Q-4V408M4Q-4408M4Q-4V600–900psid408M4F4Q-5408M4F4Q-5V408M4Q-5408M4Q-5V900–1,500psid408M4F4Q-6408M4F4Q-6V408M4Q-6408M4Q-6V1,500–3,000psid408M4F4Q-7408M4F4Q-7V408M4Q-7408M4Q-7V3,000–5,000psid408M4F4Q-8408M4F4Q-8V408M4Q-8408M4Q-8V5,000–10,000psid409M4F4Q409M4F4Q-V409M4Q409M4Q-V.09 CheckValvesPneu-Hydro’sbarstockcheckvalvessealbubble-tight,evenwithoutback-pressure.Whenopen,theyprovideasmoothflow-pathwithminimumresistance.Thepoppetisspring-loadedfor*itiveoperationregardlessoforientation.BackpressureandspringloadsarebornebyametalstopratherthanthesoftO-ringseal.Thisensureslongseallifeandminimummaintenance.Operationissmoothandchatter-free.Thesecheckvalvesareconstructedof316stainlesssteelforstrengthandcorrosionresistanceandmeettherequirementsofNACEMRO175.Becauseoftheirbarstockdesign,thevalvescanbeeasilymadefromavarietyofmaterialstosatisfytheneedsofyouroperatingenvironment.Buna-NorVitonsealsare*ailablefromstock,andotherO-ringmaterialscanbeprovided.SpecificationsOperatingpressureranges Maximum10,000psidOperatingtemperatureranges Buna-Nseals-40°to250°F(-40°to121°C)Vitonseals-20°to450°F(-29°to232°C)OrderingInformationInletOutletDimensionsCvModelNumberLHex1/4NPTF1/4NPTF2-9/323/4.55301F4Q1/4NPTM1/4NPTM2-11/323/4.55301M4Q1/4NPTM1/4NPTF2-9/323/4.55301M4F4Q3/8NPTF3/8NPTF3-1/81-1/161.3301F6Q1/2NPTM1/2NPTM3-5/81-1/161.3301M8QNotes:Buna-Nsealsarestandard.ForoptionalVitonsealsadd“-V”tothemodelnumber.Contactfactoryforothersealmaterialoptions.316stainlesssteelisstandardconstructionmaterial.Valvesmadeinothermaterialswillh*evaryingpressureratingsduetomaterialchosen.Contactfactoryforinformation.Allmodelsaredesignedfor5psidcrackingpressure.Toordervalveswiththeoptionalpressuresshownbelow,addtheindicatedsuffixnumbertothebasicmodelnumber.CrackPressureSuffixNumberExamplePartNumbers:2psid-1301F4QStandard,Buna-NO-ring,5psidcrackingpressure10psid-2301F4Q-VVitonO-ring,5psidcrackingpressure25psid-3301F4Q-3Buna-NO-ring,25psidcrackingpressure  301F4Q-3VVitonO-ring,25psidcrackingpressure HydraulicQuick-VentValvesPneu-Hydrohydraulicquick-ventvalvesaredesignedtobeplacedinthelinebetweenaco*olvalveandactuator.Whenco*olpressureisapplied,theinternalpoppetclosesthequick-ventportanddirectsflowthroughtheoutlettotheactuator.Uponreleaseofpressure,thepoppet’sinternalcheckclosesandthepoppetisliftedofftheventseat.Thelargecapacityoftheoutlet/ventpassagepermitsrapidflowfromtheactuator.ThevalveisconstructedofcorrosionresistantmaterialsinaccordancewithNACEMR-01-75.SpecificationsOperatingpressureranges Maximum10,000psidOperatingtemperatureranges Buna-Nseals-40°to250°F(-40°to121°C)Vitonseals-20°to450°F(-29°to232°C)OrderingInformationPartNo.Deion433254Buna-Nseals433254-VVitonseals HandValvesPneu-Hydrohandvalvesofferdesignandoperatingfeaturesnottypicallyfoundonvalvesofthispressurerange.TheTeflonstempackingislocatedbelowthestemthreadsandpintleswivel.Thishelpspreventcon*inationandlubricationwashoutbyisolatingthiscriticalareafromtheprocessfluid.This,combinedwiththeverylowoperatingtorque(lessthan10lb-inches),providesaprecise“feel”andadjustmentsensitivityoverthelifetimeofthevalve.Thevalvestemisdesignedsothatitcannotbeinadvertentlybackedoutofthevalve.Thelowprofilemakesthisvalveideallysuitedforpanelmountedorotherlimitedspaceapplications.Standardfeaturesincludeself-aligningswivelpintlestominimizeseatscoring,Teflonstemseal,and316stainlesssteelconstructiontoprovidemaximumcompatibilitywithcorrosivefluids.SpecificationsOperatingpressureranges Maximumoperatingpressure10,000psig(except206F4Q)Proofpressure20,000psigBurstpressure40,000psigOperatingtemperatureranges Temperaturerange-65°to450°F(-53°to232°C)Cv.26OrderingInformationInletOutletDimensionsOrificeCvModelNumberLHSq1/4NPTF1/4NPTF1-13/162/1/21.125.26202F4Q1/4NPTM1/4NPTF1-15/162/1/21.125.26202M4F4Q1/4NPTF1/4NPTF1-13/162-3/87/8.125.26206F4Q*1/2NPTF1/2NPTF33-3/41-1/2.250.80202F8Q*6,000psigmaximumoperatingpressure ShuttleValvesTheheartofaPneu-Hydroshuttlevalveisastainlesssteelball.TheslightestpressureblowsthisballfromoneO-ringseattotheotheranddirectsflowtotheoutletport.Thebreakawayfrictionofslidingsealdesignsiseliminatedbythis“contactseal”principle.Pneu-Hydroshuttlevalvesaremadefrom316stainlesssteel.Buna-Nsealsarestandard,butVitonorotherelastomersare*ailabletomeetspecificrequirements.SpecificationsOperatingpressureranges Operatingpressure250psig(maximum)Proofpressure375psigBurstpressure5,000psigOperatingtemperatureranges Buna-Nseals-40°to250°F(-40°to121°C)Vitonseals-20°to450°F(-29°to232°C)Cv.40OrderingInformationPartNo.Deion801F4QBuna-Nseals801F4Q-VVitonseals PneumaticCo*olValvesPneu-Hydro’spneumaticco*olvalvesaresimpleandrobust.Thesesmoothactingvalvesofferbubble-tightsealing.Theycanbeline,panel,orbracketmountedtocomplywithyourtoughestinstallationproblems.Constructedof316stainlesssteel,withabroadselectionof*ailableO-ringmaterials,theycanbeusedinyourtoughestapplications.SpecificationsOperatingpressureranges Operatingpressure250psigmaximumProofpressure375psigBurstpressure5,000psigOperatingtemperatureranges Vitonseals-20°to450°F(-29°to232°C)Cv.40OrderingInformationPartNo.Deion183552Panelmounted,pushbutton183554Bracketmounted,pushbutton183612Linemounted,pushbutton433553Bracketmounted,pilotoperated433555Linemounted,pilotoperated Hydraulic-PneumaticInterfaceValvesOccupyingaboutathirdofthespacerequiredbyconventionaldiaphragminterfacevalves,thisthree-way,two*ition,normallyclosedvalvepermitsalow-pressuresignalfromanintegralpneumaticpilottoco*olahigh-pressurehydraulicpowersystem.Thepilotsectionhandlespressuresto1,000psi;thehydraulicsectionaccommodatespressuresto10,000psi.Inthisuniquespoolvalvedesign,theusualpilotdiaphragmisreplacedbyapiston.Theuseofastainlesssteelpistonandcompatiblesealeliminatesfailuresduetodiaphragmleakageandincompatibilityofdiaphragmwithprocessfluids.Ahighratioofhydraulicpowerpressuretopilotco*olpressureinsuressafeoperationand*itiveco*olunderallconditions.Apilotpressureof50psico*ols5,000psihydraulicpower;80psipilotpressureco*ols10,000psihydraulicpowerpressure.Asoftsealdesigninsureszeroleakageinthehydraulicpowersection.Metal-to-metalseatinginsuresagainstleakageinemergencysituations.Failsafeclosureisinsured,asboththeinternalspringandhydraulicpressureactingonthedifferentialspoolareaprovidesufficientforcetoeffectclosure,shouldoneortheotherfail.Normallybothacttoclosethevalve.A*itiveindicatorofoperationisprovidedinthespoolextension,whichshiftstoshow*ition.ExcellentflowcapacityisprovidedwithavalueofCv=0.5ortheequivalentofanorificeof.224inchdiameter.Anormallyopenversionofthisvalveisalso*ailableunderproductnumber433242-P.Withminordifferencesthedimensionsandoperatingparametersarethesameforthisversion.Themanualoverrideversionhasaturninghandlelocatedattopcenterofpistonhousing.SpecificationsCompleteassembly Weight5.8lbs.(2.6Kg)Pilotsection FluidAirorhydraulicOperatingpressure50psi(3.45bar)airpressurefor5,000psi(345bar)hydraulicpressure80psi(5.5bar)airpressurefor10,000psi(689bar)hydraulicpressureWorkingpressure1,000psi(68.9bar)maximumProofpressure1,500psi(103.4bar)Burstpressure2,000psi(137.9bar)Valvesection FluidHydraulicfluidordieselWorkingpressure10,000psi(689bar)maximumProofpressure15,000psi(1034bar)Burstpressure20,000psi(1379bar)Temperaturerange-65°to450°F(-53°to232°C)FlowcapacityCv+0.5Flow39GPMat5,000psi(147litersperminuteat345bar)InternalleakageZeroExternalleakageZeroOrderingInformationPartNo.Deion183834-P6,000psiworkingpressure,manualoverride,Vitonseals433174-P6,000psiworkingpressure,standardandH2S-CO2service,Vitonseals433174-PA6,000psiworkingpressure,Arcticservice,-65°FBuna-Nseals433174-PH8,000psiworkingpressure,standardandH2S-CO2hydraulicpilot,Vitonseals433174-PHA8,000psiworkingpressure,Arctichydraulicpilot,-65°FBuna-Nseals433242-P6,000psiworkingpressure,normallyopen,Vitonseals433707-P6,000psiworkingpressure,twoinlet,Vitonseals43418910,000psiworkingpressure,standardandH2S-CO2service,Vitonseals Excess-FlowCheckValvesThePneu-Hydroexcess-flowcheckvalvehasbeendesignedtocontainpressurizedfluidsintheeventofcatastrophicdown-streamfailure.Itspoppetisnormallyheldopenbyaspringandflowispermittedinbothdirectionsthroughthevalve.Intheeventofdown-streamfailure(line-rupture,seal-failure,gaugeover-pressurizationandfailure,etc.)theresultantpressure-dropacrossthepoppetorificecreatesanimbalancewhichclosesthepoppet.Thepoppetremainsclosed,preventingfurtherescapeoffluid,untilthesystemisrepaired.Removalofsupplypressureforsystemmaintenanceallowsthespringtoresetthepoppettoitsopen*ition.SpecificationsOperatingpressureranges ServiceStandard,H2S-CO2DesignspecificationNACEMR-01-75FluidLiquidorgasOperatingpressure50psi(3.45bar)Workingpressure7,500psi(517bar)maximumProofpressure10,000psi(689bar)Burstpressure15,000psi(1034bar)Operatingtemperatureranges Vitontemperaturerange-20°to450°F(-29°to232°C)FlowcapacityCv.45FlowValveshutspneumaticallyat1.0psidSensitivitycanbeadjustedbysizingorifice(2)orsprings(consultfactory)Internal-externalleakageZeroWeight.375lbs.OrderingInformationPartNo.Deion213677Vitonseals SandProbeValvesContinuousmonitoringoftheeffectsofanabrasiveproductonflowlineandvalvesis*siblewiththeuseofthePneu-HydroProductssandprobe.Asensingprobeofapredeterminedthicknessextendsthroughthepipewallintotheflowpathoftheabrasiveproduct.Whentheprobeiscut,indicatingaknowndegreeoferosiontolines,valves,andfittings,pressurefromtheflowlineentersthesandprobevalvebody,shiftingthespoolvalveandventsoffaco*olpressure.Thissignalmaybeusedtoeithercloseavalveortriggeranalarm.Thedeviceissuitableforusewithpneumaticco*olsystems.Selecttheprobelengthandthicknessfromtheprobekitchartonthispage.Thesensingpilotisdesignedwitha1/2NPTmalethreadforattachmenttothepipe.Thissurroundsa1/4NPTfemaleconnection.Withthisconfiguration,probescanbereadilyfabricatedinthefieldfromstandardfittingsandtubing.FeaturesandAdvantagesWidepressurerange:Thisdevicemaybesafelyoperatedinflowlinescontainingpressuresintherangeof25psito10,000psi.Co*olpressurerange:Thepilothandlesaco*olsystempressureof20psito250psi.Visualindicator:Whentheprobehasbeencutandthepilotspoolshifts,thepalmbuttonandredbandonthemainspoolindicatethatthepilothasbeenactivated.Manualco*ol:Thepalmbuttononthepilotmaybeusedatanytimetocyclethevalveandtestthesystem.Simplicity:Whentheprobehasbeencutbyabrasiveactionoftheflowingproduct,thepressureinthepipelineshiftsthepilotspool.Choiceofprobes:Standardwallprobesare*ailableinthicknessesof.028;.035;.049;and.065inches.Standardlengthprobesare6,10,and14inches.SelectionProceduresThesandprobegivesanaccurateindicationoftheerosionontheflowlineanditscomponents.Inthefollowingprocedure,theuseofprobesofdifferentwallthicknessesisdemonstrated:Pipe:2-inchschedule80-normalwallthickness.218-inch.Minimumwallthicknessfor1200psioperation:.15inch.Maximumallowableerosion:.068inch(.218minus.15).SpecificationsOperatingpressureranges Sensingpressure10,000psi(689bar)maximumCo*olpressure250psi(17bar)maximumOperatingtemperatureranges Temperaturerange-20°Fto450°F(-29°Cto232°C)Productweight1.5lbs.(.68kg.)OrderingInformationBasicvalvebodyandrepairkit.PartNo.Deion43405130to250psiworkingpressure,valveassembly(lessprobe)434052250to10,000psiworkingpressure,valveassembly(lessprobe)434062250to10,000psiworkingpressure,panelmountvalveassembly(lessprobe)614051Repairkitforvalveassembly434051(doesnotcontainprobe)614052Repairkitforvalveassembly434052(doesnotcontainprobe)Forexample,onePneu-HydroProductssandprobeassemblyforstandardandH2S-CO2service,partno.434052.Partsrequest(forvalveonly),onerepairkitforaPneu-HydroProductssandprobeassemblyforstandardandH2S-CO2service,partno.614052.  PressureIndicatorsPneu-Hydro’spressureindicatorofferseasytoreadevidenceofthepresenceorabsenceofpneumaticpressureinaco*olcircuit.Whenpressurerisestoapproximately14psi,asolidgreenbandshowsthroughthewindow.Ifthepressuredropsbelow8psi,aredandwhitestripedbandappears.Thecolorsarereflectiveforvisibilityinlightedsurroundings.Thestripedsectionprovidesaddedrecognitionofsystemstatusunderdimlylitconditionsorforcolor-blindpersonnel.Theunitmountsthrougha1-3/4”diameterholeandinpanelsfrom17gaugeto3/16”thick.Theindicatorisconstructedof316stainlesssteelandsatisfiesNACEMRO175standard.SpecificationsOperatingpressureranges Workingpressure250psigProofpressure500psigCv.035Operatingtemperatureranges EthylenePropyleneseal-65°to300°F(-53°to148°C)Buna-Nseals-40°to250°F(-40°to121°C)Vitonseals-20°to450°F(-29°to232°C)OrderingInformation1/8NPTConnection1/4NPTConnectionVitonBuna-NEthylenePropyleneVitonBuna-NEthylenePropylene433774433774-A433774-EPDM433775433775-A433775-EPDM InlineFiltersThePneu-Hydrobarstockcomponentfilterusesaminimumnumberofpartsforeconomyandreliability.Ithasastrong,durableelement,withalargesurfaceareathatreducestheneedforfrequentcleaningorreplacement.Auniqueassemblyretainsthefilterelementsolidly,preventingflutter;yetitiseasilyremovedforcleaningorreplacement.Itwillnotco*ibutetosystempulsation.Avarietyoffiltrationrangesare*ailable.The316stainlesssteelfilterelementandTeflongasketpermitusewithawidevarietyofcorrosivefluids.SpecificationsOperatingpressureranges Systempressure Brass3,000psigmaximumStainlesssteel6,000psigmaximumMaximumpsid1000acrossfilterelement(psidincreasesasfiltercollectscon*inants)Operatingtemperatureranges Temperaturerange-65°to450°F(-53°to148°C)OrderingInformationInletandOutletConnectionsDimensions(inches)FiltrationArea(inches)ModelNumbersLH(acrossHexflats)Brass316Stainless1/4NPTFemale2-11/163/41.5501F4B501F4Q1/2NPTFemale3-17/3211/82.7501F8B501F8QFilterElementsThefilterslistedabovearesuppliedwiththeproperelementsforuseatspecificrangesoffiltration.Toorderadesiredrange,addtheindicatedsuffixnumbertothebasicmodelnumber.Toorderreplacementelements,usetheelementpartnumber.(Filterelementsare316stainlesssteel.)NominalFiltrationRange(m)For3/4HexHousingsFor11/8HexHousingsSuffixNumberElementPartNo.CvElementPartNo.Cv5-10592947-2.25592946-2.40210-20592947-3.50592946-3.80350-75592947-6.90592946-51.155592946-61.56Example:ModelNo.501F4B-2designatesa1/4NPTfemalethreadbrasshousingwithelementfor5-10micronfiltration. O-RingToolKitThiskitofspeciallydesignedtoolsforinstallingandextractingO-ringsconsistsof:JoggingandinstallationtoolJoggingandremovaltoolFlatfacepryingtoolPointedpryingtoolPiercingtoolProddingtoolTweezersTheitemsareinvaluabletoengineers,technicians,andassemblypersonnelworkingonpneumatic,hydraulicandotherfluidhandlingdevices.Theyarefabricatedfromcorrosion-resistantmaterialsforcompatibilitywithmostfluidsandmaybeusedinclean-roomapplications.Toolsarepackagedinanattractiveplasticpouchwithpocketstoseparatethevariousitems.OrderingInformationPartNo.Deion001-ZOZ316stainlesssteeltools  标签：  南昌市减压阀 南昌市减压阀厂家江西南昌市南昌市减压阀厂家PNEU-HYDRA减压阀