Li-valve tsa tlhahlobo, li-valve tse sa khutliseng, li etselitsoe ho thibela ho khutlela morao ha phallo tsamaisong ea liphaephe. ​​Li-valve tsena li kenngoa tšebetsong ke thepa e phallang ka har'a phaephe.Khatello ea mokelikeli o fetang tsamaisong e bula valve, ha phetoho efe kapa efe ea phallo e tla koala valve.Ho kwala ho fihlellwa ke boima ba mochine wa ho hlahloba, ka kgatello ya mokokotlo, ka sepori, kapa ka motswako wa mekgwa ena.

Theha Steel Check Valve  ke bakeng sa li-valve tse nyane tsa ho hlahloba khatello e phahameng, tse entsoeng ka tšepe e entsoeng ka forged. Re atisa ho li etsa ka har'a swing check valve, piston check valve (lift check valve).E fumaneha ka meralo e meraro ea li-bonnet. Moralo oa pele ke Bolnet ea Bolted, e nang le lenonyello la monna-le mosali, gasket ea spiral wond, e entsoeng ka F316L/graphite. Gasket ea lenonyello la lesale le eona e fumaneha ha ho kopuoa. Moralo oa bobeli ke bonnet e kopantsoeng, e nang le lenonyello le kopantsoeng ka khoele le tiiso. Ha ho kopuoa, lenonyello le kopantsoeng ka matla a ho kenella ka botlalo lea fumaneha, moralo oa ho qetela ke bonnet ea tiiso ea khatello, e leng moralo oa li-valve tsa khatello e phahameng.