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Auqi Valve

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Structural analysis of different ball valve seats
2019-02-25
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
The6thShanghaiInternationalPumpandValveExhibition2017washeldonJune7thattheShanghaiNationalConventionandExhibitionCenter.Morethan700pumpandvalveexhibitorsparticipatedintheexhibition,thescaleoftheexhibitionreached40,000squaremeters,andtherewere638exhibitorsathomeandabroad.In3days,atotalof3,8276professionalvisitorsweregreeted,including3,817overseasvisitors.
How to choose coal chemical valve?
2019-02-25
Moderncoalchemicalindustryhashigherandhigherrequirementsforvalveproducts.Whatisspecialaboutthecoalchemicalindustry?Howshouldsmallvalvesadapttothedifficultenvironmentofthecoalchemicalindustry?
The world's product testing certification marks list which products your products pass through.
2019-02-25
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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