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Structural analysis of different ball valve seats
2019-02-25

Structural analysis of different ball valve seats
The main function of the ball valve is to cut or close the fluid passage in the pipe. The working principle of the ball valve is to transmit a certain torque to the ball at the upper end of the valve stem by means of the driving device, and rotate it to 90° to complete the action of opening or closing the valve.
Shanghai World Circle Conference 6th Pump and Valve Exhibition
2019-02-25

Shanghai World Circle Conference 6th Pump and Valve Exhibition
The6thShanghaiInternationalPumpandValveExhibition2017washeldonJune7thattheShanghaiNationalConventionandExhibitionCenter.Morethan700pumpandvalveexhibitorsparticipatedintheexhibition,thescaleoftheexhibitionreached40,000squaremeters,andtherewere638exhibitorsathomeandabroad.In3days,atotalof3,8276professionalvisitorsweregreeted,including3,817overseasvisitors.
How to choose coal chemical valve?
2019-02-25

How to choose coal chemical valve?
Moderncoalchemicalindustryhashigherandhigherrequirementsforvalveproducts.Whatisspecialaboutthecoalchemicalindustry?Howshouldsmallvalvesadapttothedifficultenvironmentofthecoalchemicalindustry?
The world's product testing certification marks list which products your products pass through.
2019-02-25

The world's product testing certification marks list which products your products pass through.
Whatarethesafetycertificationcodesthatforeigntradeexportproductsneedtopassinothercountries?Whatarethemeaningsofthesecertificationmarks?Letuslookatthecurrent20internationallyrecognizedcertificationmarksandtheirmeanings,andseeifyourproductsarecurrentlypassed.Thefollowingcertifications.1,CE TheCEmarkisasafetycertificationmarkandisregardedasapassportthatthemanufactureropensandenterstheEuropeanmarket.CEstandsforCONFORMITEEUROPEENNE.Productsbearingthe"CE"markcanbesoldinEUmemberstateswithoutmeetingtherequirementsofeachmemberstate,thusrealizingthefreecirculationofgoodswithintheEUmemberstates. 2,ROHS ROHSistheabbreviationof"TheRestrictionoftheuseofcertainhazardoussubstancesinelectricalandelectronicequipment".ROHSlistsatotalofsixhazardoussubstances,including:leadPb,cadmiumCd,mercuryHg,hexavalentchromiumCr6+,polybrominateddiphenyletherPBDE,polybrominatedbiphenylPBB.TheEUbeganimplementingROHSonJuly1,2006.ElectricalandelectronicproductsthatuseorcontainheavymetalsandPBDEssuchaspolybrominateddiphenylethersandPBBsarenotallowedtoentertheEUmarket.ROHSisforallelectricalandelectronicproductsthatmaycontaintheabovesixhazardoussubstancesinallproductionprocessesandrawmaterials,including:whitegoods,suchasrefrigerators,washingmachines,microwaveovens,airconditioners,vacuumcleaners,waterheaters,etc.,blackappliances,suchasaudioandvideoproducts.,DVD,CD,TVreceiver,ITproducts,digitalproducts,communicationproducts,etc.;powertools,electricelectronictoys,medicalelectricalequipment. Remark:Whentheguestasksifthereisnorohs,hehastoaskwhetherhewantsthefinishedrohsortherawmaterialsrohs.Somefactoriescan'tdothefinishedrohs,andthepriceofrohsisgenerallyabout10%-20%higherthantheordinaryproducts. 3,UL ULisashorthandforUnderwriterLaboratoriesInc.TheULSafetyLaboratoryisthemostauthoritativeintheUnitedStatesandalargeprivateinstitutionengagedinsafetytestingandidentification.Itisanindependent,non-profit,professionalorganizationthattestsforpublicsafety.Itusesscientifictestingmethodstodeterminetheextenttowhichvariousmaterials,devices,products,equipment,buildings,etc.arehazardousorharmfultolifeandproperty;todetermine,prepare,andissueappropriatestandardsandtohelpreduceandpreventlife.Thepropertyissubjecttolossofinformation,andatthesametime,thefact-findingbusinessiscarriedout.Inshort,itismainlyengagedinproductsafetycertificationandbusinesssafetycertificationbusiness,anditsultimategoalistoobtainafairlysafeproductforthemarketandcontributetotheprotectionofpersonalhealthandpropertysafety.Regardingproductsafetycertificationasaneffectivemeansofeliminatingtechnicalbarrierstointernationaltrade,ULalsoplaysanactiveroleinpromotingthedevelopmentofinternationaltrade. Remark:ItisnotmandatoryforULtoentertheUnitedStates. 4.FDATheUSFoodandDrugAdministrationreferredtotheFDA.TheFDAisoneoftheexecutiveagenciesestablishedbytheUSgovernmentintheDepartmentofHealthandHumanServices(DHHS)andtheDepartmentofPublicHealth(PHS).TheFDA'sroleistoensurethesafetyoffood,cosmetics,pharmaceuticals,biologics,medicaldevicesandradioactiveproductsproducedorimportedintheUnitedStates.Afterthe"9.11"incident,peopleintheUnitedStatesbelievedthatitwasnecessarytoimprovethesafetyoffoodsupply.AftertheUSCongresspassedthePublicHealthandSafetyandBioterrorismPreventionandCountermeasuresActof2002inJunelastyear,itallocatedUS$500milliontoauthorizetheFDAtoformulatespecificrulesforimplementingthebill.TheregulationstipulatesthattheFDAwillassignaregistrationnumbertoeachregistrationapplicant.ThefoodexportedbytheforeigninstitutiontotheUnitedStatesmustbenotifiedtotheUSFoodandDrugAdministration24hoursbeforearrivingattheUSport,otherwiseitwillberefusedentry.Anddetainedattheportofentry.
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