A na-ejikwa valvụ diaphragm welded nke ọkwa nri site na ngwaọrụ ịnya ụgbọ ala ma ọ bụ jiri aka rụọ ya.Ngwaọrụ ịnya ụgbọ ala nwere ụkpụrụ atọ: ụdị emechiri emechi, ụdị na-emeghe na ụdị gas.Ọ nwere uru nke usoro dị mfe, ọdịdị mara mma, ngwa ngwa disassembly na mgbakọ, arụ ọrụ na-agbanwe agbanwe, obere mmiri na-eguzogide mmiri, nchekwa na ntụkwasị obi, wdg Ọ dabara maka njikwa mmiri, gas, mmanụ na mgbasa ozi corrosive na ụlọ ọrụ kemịkal, mmanụ ala , metallurgy, mmiri kpo oku, nri, ọgwụ na ndị ọzọ ọrụ.