Ama-valve okusakaza ama-valve enziwe ngokuphonsa.Ngokuvamile, izilinganiso zokucindezelwa kwamavalvu okuphonswa ziphansi kakhulu (ezifana ne-PN16, PN25, PN40, kodwa zikhona futhi ezinengcindezi ephezulu, ezingafinyelela ku-1500Lb, 2500Lb), futhi eziningi zazo zingaphezu kwe-DN50.Amavalvu omgunyathi akhiwe futhi ajwayele uku...
Funda kabanzi