Qhov kub txwv rau ntau yam khoom siv valve nyob ntawm seb cov khoom siv thiab nws muaj peev xwm tiv taus qhov kub thiab txias. Hauv qab no, kuv mam li muab cov lus qhia dav dav rau qee yam khoom siv valve thiab lawv qhov kub thiab txias. Nco ntsoov tias qhov ntsuas kub tshwj xeeb tuaj yeem sib txawv raws li cov chaw tsim khoom thiab cov khoom zoo. Nws yog ib qho tseem ceeb uas yuav tau sab laj nrog lub chaw tsim khoom valve cov ntaub ntawv rau cov lus pom zoo ntawm qhov kub thiab txias rau ib qho valve.
Carbon Steel:
Cov pa roj carbon steel feem ntau tuaj yeem tswj qhov kub ntawm -29 degree (-20 degree F) txog 538 degree (1000 degree F) lossis siab dua, nyob ntawm qib tshwj xeeb thiab tsim.
Stainless hlau:
Stainless hlau li qub paub txog lawv cov kev tiv thaiv corrosion thiab tuaj yeem ua haujlwm hauv qhov kub thiab txias, feem ntau ntawm -196 degree ({1}} degree F) txog 816 degree (1500 degree F).
tooj dag:
Brass li qub yog haum rau qhov kub thiab txias xws li -40 degree (-40 degree F) txog 149 degree (300 degree F), tab sis lawv yuav tsis haum rau cov ntawv thov kub heev.
Bronze:
Bronze li qub muaj qhov kub zoo sib xws rau tooj dag, feem ntau yog los ntawm -40 degree ({1}} degree F) txog 204 degree (400 degree F).
Cam khwb cia hlau:
cam khwb cia hlau li qub, xws li cov siv hauv cov ntawv thov uas tsis tshua muaj siab, tuaj yeem tswj tau qhov kub thiab txias li ntawm -34 degree ({2}} degree F) txog 538 degree (1000 degree F).
PVC (Polyvinyl Chloride):
PVC li qub yog txwv rau cov ntawv thov kub qis thiab feem ntau yog siv nyob rau hauv thaj tsam ntawm -20 degree ({2}} degree F) txog 60 degree (140 degree F).
CPVC (Chlorinated Polyvinyl Chloride):
CPVC li qub tuaj yeem tswj tau qhov kub thiab txias me ntsis dua li PVC, feem ntau yog los ntawm -20 degree ({1}} degree F) txog 93 degree (200 degree F).
PTFE (Polytetrafluoroethylene, Teflon):
PTFE paub txog nws cov tshuaj tiv thaiv zoo heev tab sis muaj qhov kub thiab txias ntawm kwv yees li -29 degree ({1}} degree F) txog 204 degree (400 degree F).
Alloy li qub (xws li Inconel, Hastelloy, Monel):
Alloy li qub yog tsim los rau qhov kub thiab txias thiab corrosive daim ntaub ntawv thiab tuaj yeem ua haujlwm nyob rau hauv ntau qhov kub thiab txias, feem ntau los ntawm qhov kub thiab txias mus txog 1000 degree (1832 degree F), nyob ntawm seb cov alloy tshwj xeeb.
Ceramic:
Ceramic li qub paub txog lawv cov kev tiv thaiv hnav thiab corrosion tab sis tuaj yeem ua haujlwm ntawm qhov kub thiab txias feem ntau yog li ntawm {{0}} degree (0 degree F) txog 871 degree (1600 degree F) lossis siab dua.
Cov no yog cov txheej txheem kev ntsuas kub rau cov khoom siv dav siv. Txawm li cas los xij, qhov ntsuas kub tshwj xeeb tuaj yeem sib txawv raws li qhov muaj pes tsawg leeg ntawm cov khoom, lub valve tsim, thiab daim ntawv thov npaj. Nco ntsoov xa mus rau cov chaw tsim khoom cov lus qhia tshwj xeeb thiab cov lus qhia rau cov ntaub ntawv tseeb tshaj plaws hais txog qhov kub thiab txias ntawm ib qho valve.
