Kev tshawb nrhiav hauv internet sai sai rau lub valve yuav pom ntau yam txiaj ntsig sib txawv: tes lossis tsis siv neeg, tooj dag lossis hlau tsis xeb, flanged lossis NPT, ib daim, ob lossis peb daim, thiab lwm yam. Muaj ntau hom valve sib txawv xaiv los ntawm, koj yuav paub li cas tias koj yuav hom yog? Txawm hais tias koj daim ntawv thov yuav pab coj koj xaiv lub valve kom raug, nws yog ib qho tseem ceeb kom nkag siab txog ntau hom valves uas muaj.

Lub pob valve ib daim muaj lub cev khov kho uas txo qhov kev pheej hmoo ntawm kev xau. Lawv pheej yig thiab feem ntau tsis tau kho.

Ob daim pob valve yog qee qhov siv ntau tshaj plawslub pob valveRaws li lub npe qhia, lub pob valve ob daim muaj ob daim, ib daim nrog ib daim txuas rau ntawm ib kawg thiab lub cev valve. Daim thib ob haum rau saum daim thawj, tuav lub trim rau hauv qhov chaw thiab suav nrog qhov kawg thib ob txuas. Thaum ntsia lawm, cov valve no feem ntau tsis tuaj yeem kho tau tshwj tsis yog tias lawv raug tshem tawm ntawm kev pabcuam.

Dua li, raws li lub npe qhia, lub pob valve peb daim muaj peb ntu: ob lub hau kawg thiab lub cev. Lub hau kawg feem ntau yog xov lossis vuam rau lub yeeb nkab, thiab lub cev tuaj yeem tshem tawm yooj yim rau kev ntxuav lossis kho yam tsis tau tshem lub hau kawg. Qhov no tuaj yeem yog ib qho kev xaiv muaj txiaj ntsig zoo vim nws tiv thaiv cov kab ntau lawm kom tsis txhob raug kaw thaum xav tau kev saib xyuas.

Los ntawm kev sib piv cov yam ntxwv ntawm txhua lub valve nrog koj cov kev xav tau ntawm daim ntawv thov, koj yuav muaj peev xwm txiav txim siab tau zoo tshaj plaws uas haum rau koj cov kev xav tau. Mus saib peb lub vev xaib valve kom paub txog peb cov khoom lag luam pob valve lossis pib teeb tsa hnub no.

Kev raug UV
DawbCov yeeb nkab PVC,hom siv rau kev kho dej, tawg thaum raug lub teeb UV, ib yam li los ntawm lub hnub. Qhov no ua rau cov khoom siv tsis haum rau kev siv sab nraum zoov uas nws yuav tsis raug npog, xws li cov ncej chij thiab cov ntawv thov ru tsev. Raws sijhawm, kev raug UV txo qhov yooj ywm ntawm cov khoom siv los ntawm kev puas tsuaj ntawm polymer, uas tuaj yeem ua rau tawg, tawg, thiab tawg.

kub tsawg
Thaum qhov kub poob qis, PVC yuav tawg ntau dua thiab tawg ntau dua. Thaum raug rau qhov kub thiab txias ntev ntev, nws yuav tawg thiab yooj yim tawg. PVC tsis haum rau cov ntawv thov uas muaj qhov kub thiab txias tas li, thiab dej yuav tsum tsis txhob khov hauv.Cov kav dej PVCvim nws tuaj yeem ua rau tawg thiab tawg.

hnub nyoog
Txhua yam polymers lossis plastics lwj mus rau qee qib raws sijhawm. Nws yog ib yam khoom ntawm lawv cov tshuaj lom neeg. Raws sijhawm, PVC nqus cov khoom hu ua plasticizers. Plasticizers raug ntxiv rau PVC thaum lub sijhawm tsim khoom kom ua rau nws yooj ywm dua. Thaum lawv tsiv tawm ntawm cov kav dej PVC, cov kav dej tsis yog tsuas yog yooj ywm dua vim tsis muaj lawv, tab sis kuj tseem tshuav nrog qhov tsis zoo vim tsis muaj cov plasticizer molecules, uas tuaj yeem tsim cov kab nrib pleb lossis fissures hauv cov kav dej.

kev raug tshuaj lom neeg
Cov kav dej PVC tuaj yeem ua rau tawg yooj yim los ntawm kev raug tshuaj lom neeg. Ua ib yam khoom siv polymer, cov tshuaj lom neeg tuaj yeem muaj kev cuam tshuam tsis zoo rau cov khoom sib xyaw ntawm PVC, ua rau cov khoom sib txuas ntawm cov molecule hauv cov yas xoob thiab ua kom cov plasticizers txav mus los ntawm cov kav dej sai dua. Cov kav dej ntws PVC tuaj yeem ua rau tawg yooj yim yog tias raug ntau cov tshuaj lom neeg, xws li cov uas pom muaj nyob rau hauv cov tshuaj tshem cov kua dej ntws.