Le valve ezilawulayo ezisebenza yona iyivalvu yensimbi engenasici yokunciphisa ingcindezi eklanyelwe ngokukhethekile amapayipi esitimu anezinga lokugeleza elizinzile nelilinganiselayo. Isebenzisa izinto ezisezingeni eliphezulu zensimbi engagqwali, ezinokumelana nokugqwala okuhle nokumelana nokushisa okuphezulu, futhi ingagcina ukusebenza okuzinzile ezindaweni zokusebenza ezinokhahlo ezihlukahlukene.
Umsebenzi oyinhloko wale valve elawulayo ukuzuza ukucindezela okuzinzile nokulinganisela kumapayipi omusi ngokulungisa ngokuzenzakalelayo izinga lokugeleza. Ingakwazi ukulungisa ngokuzenzakalelayo ukuvulwa kwe-valve ngokuvumelana nezinguquko zengcindezi yesitimu, iqinisekise ukuthi izinga lokugeleza kwe-steam nokucindezela kuhlala kungaphakathi kwebanga elimisiwe. Lokhu akukwazi nje ukuthuthukisa ukusebenza kahle kokusetshenziswa kwesitimu, kodwa futhi kugweme izinkinga zokuphepha ezibangelwa ukucindezela okuphezulu noma okuphansi.
Ngaphezu kwalokho, le valve elawulayo nayo inomsebenzi wokunciphisa ukucindezela okulinganayo. Inganciphisa ingcindezi yesitimu esinomfutho ophezulu ibe ingcindezi ephansi efanele ukuze kuhlangatshezwane nezidingo zomsebenzi ezahlukene. Ngaphezu kwalokho, isilinganiso sayo sokunciphisa ingcindezi singashintshwa njengoba kudingeka, okwenza kube lula kakhulu ukuyisebenzisa.
Sekukonke, le valve ezilawulayo ezisebenza yona isezingeni eliphezulu futhi kulula ukuyisebenzisa imishini yamapayipi esitimu, engadlala indima ebalulekile kukho kokubili ukukhiqizwa kwezimboni nempilo yasekhaya.
