Lub teeb liab npauj npaim valve feem ntau muaj qhov loj ntawm DN50-300 thiab lub siab qis dua PN16. Nws yog dav siv nyob rau hauv cov thee tshuaj, petrochemical, roj hmab, ntawv, tshuaj thiab lwm yam pipelines raws li ib tug diversion thiab confluence los yog flow switching ntaus ntawv.