Valavu ya butterfly yapawiriyi imagwiritsa ntchito chitsulo cha ductile kwa thupi la valve, pa disc, timasankha zida za SS304, ndi cholumikizira cholumikizira, timapereka PN10/16, CL150 kusankha kwanu, Iyi ndi valavu yagulugufe yapakati. Mphepo imagwiritsidwa ntchito mu Chakudya, mankhwala, mankhwala, mafuta, mphamvu yamagetsi, nsalu zopepuka, mapepala ndi madzi ena ndi ngalande, payipi ya gasi yowongolera kuyenda ndikudula gawo lamadzimadzi.