Thaum xaiv PEX (cross-linked polyethylene) kav rau kev siv hauv av, nws yog ib qho tseem ceeb uas yuav tau xaiv cov kav dej uas tau tsim tshwj xeeb thiab pom zoo rau kev siv. Nov yog qee qhov kev pom zoo ntawm cov kav dej PEX rau kev teeb tsa hauv av:
1. PEX-A (PEX hom A)
PEX-A cov kav dej yog hloov tau yooj yim thiab muaj lub cim xeeb zoo heev. Lawv muaj peev xwm tiv taus khov thiab thawing voj voog yam tsis muaj kev cuam tshuam lawv txoj kev ncaj ncees, ua rau lawv tsim nyog rau kev siv hauv av.
2. PEX-AL-PEX
PEX-AL-PEX cov kav dej muaj txheej txheej txhuas sandwiched ntawm ob txheej ntawm PEX. Qhov kev tsim kho no muab ntxiv dag zog thiab tiv thaiv kev puas tsuaj los ntawm cov khoom sab nraud, ua rau lawv tsim nyog rau kev siv hauv av.
3. PEX-B (PEX hom B)
Thaum cov kav dej PEX-B feem ntau tsis hloov pauv ntau dua li PEX-A, lawv tseem tuaj yeem siv rau hauv cov ntawv thov hauv av. Lawv muab kev ua haujlwm zoo thiab ua haujlwm rau corrosion, ua rau lawv tsim nyog rau kev teeb tsa hauv av tshwj xeeb.
Nws yog ib qho tseem ceeb uas yuav tau xyuas nrog cov cai hauv zos thiab cov cai los txiav txim seb hom PEX cov kav dej twg tau pom zoo rau kev siv hauv av hauv koj qhov chaw tshwj xeeb. Tsis tas li ntawd, kev sab laj nrog tus kws tshaj lij kav dej lossis tus kws kho cua sov tuaj yeem pab xyuas kom muaj kev xaiv thiab kev teeb tsa ntawm PEX kav dej rau koj daim ntawv thov hauv av.