Tsis rov qab viav vias kos valve yog siv rau hauv cov kav dej hauv siab ntawm 1.6-42.0. Ua haujlwm kub ntawm -46 ℃ -570 ℃. Lawv tau siv dav hauv kev lag luam xws li roj, chemistry, tshuaj thiab hluav taws xob tsim hluav taws xob los tiv thaiv qhov rov qab ntws ntawm nruab nrab.And tib lub sijhawm, cov khoom siv valve tuaj yeem yog WCB, CF8, WC6, DI thiab lwm yam.