Raws li cov khoom tseem ceeb hauv cov kua tswj cov kua, cov tshuaj pleev cov yas tau siv ntau txoj haujlwm vim lawv cov qauv kev lag luam tsis zoo, kev tsim qauv me me, thiab tus nqi zoo. Lawv lub luag haujlwm tseem ceeb yog los tiv thaiv Backflow ntawm kev tshaj xov xwm, kom muaj kev nyab xeeb thiab cov haujlwm tau zoo ntawm cov tshuab raj.
Hauv kev lag luam tshuaj, cov tshuaj xyuas cov tshuaj yas feem ntau siv los thauj cov corrosive media xws li acids, alkalis, thiab ntsev. Piv txwv li, xyuas cov roj ua los ntawm pvc (polypinyl chloride), thiab PVDropylene fluoride) yog cov tshuaj polyvinylidide, kev kho kom zoo, thiab cov kab ua haujlwm ntau lawm. Piv rau cov hlau sib piv, cov khoom siv Yas txo qis kev saib xyuas ntau zaus thiab txuas ntxiv lub neej.
Cov dej hauv nroog thiab dej phwj tuaj yeem cia siab rau cov kab yas li qub. UPVC (rigidized polyvinyl chloride) Khij cov tshuab, thiab cov dej tsis yeem siv hauv cov dej pheebsuab thiab dej phwj. Tsis tas li ntawd, lawv lub cev yuag tsim kho kom yooj yim thiab txo tus nqi tsim qauv.
Hauv kev tiv thaiv ib puag ncig thiab cua txias, thiab cua txias (HVAC), yas xyuas li qub ntws los yog tsawg {{}} kub kua. Piv txwv li, PPH (polypylene homopolymer) Khij cov khoom siv tau pom hauv cov pa roj cua, thaum cproricated polyvinyl chloride) yog qhov ntsuas kub- kub dej ntawm dej pipulation kav. Lawv qhov kev sib txhuam qis qis coefficievic txo cov kua dej tsis kam thiab txhim kho cov txheej txheem zog hluav taws xob.
Nws yog ib qho tseem ceeb kom nco ntsoov tias kev xaiv ntawm cov yas kos li qub yuav tsum tau nruj cov kev ua haujlwm nruj me ntsis (feem ntau yog rau {10℃rau 120 degree), thiab cov yam ntxwv tshaj tawm. Txawm hais tias lawv lub peev xwm siab yog qis dua li ntawm cov li qub, cov tshuaj xyuas cov tshuaj yas nyob rau hauv tsis {}} siab - ua hauj lwm zoo thiab ntseeg tau. Nyob rau hauv lub neej yav tom ntej, nrog kev nce qib hauv cov ntaub ntawv txuj ci, muaj kev kub thiab hnav-resistant engineering plastics yuav txuas ntxiv lawv thaj tsam.