Haufinyane tjena, re thehile valve ea serurubele se nang le mahlakore a mabeli bakeng sa bareki ba Majapane, mokhoa oa ho potoloha o potoloha metsi a pholileng, mocheso + 5 ℃.

Qalong moreki o ne a sebelisa valve ea serurubele ea unidirectional, empa ho na le maemo a 'maloa a hlokang hore a be le serurubele sa bi-directional, kahoo moreki oa rona o ile a re kopa hore re fane ka valve ea serurubele sa bi-directional sebakeng sena ntle le ho fetola litekanyo tsa sefahleho le sefahleho.

Kamora lipuisano tsa lefapha la tekheniki la THT, re ile ra etsa qeto ea ho sebelisa hlobo ea mantlha ea ho tiisa serurubele ho sebetsana le valve ea serurubele se tiisitsoeng ka mahlakoreng a mabeli. Ka lebaka leo, re atlehile, PN25 khatello e ntle ea khatello ea morao 1: 1.