Munguva ichangopfuura, takagadzira bi-directional wafer butterfly valve yevatengi vekuJapan, iyo yepakati iri kutenderera mvura inotonhorera, tembiricha + 5 ℃.

Mutengi pakutanga akashandisa unidirectional butterfly valve, asi kune nzvimbo dzakawanda dzinoda chaizvo bi-directional butterfly valve, saka mutengi wedu akatikumbira kuti tipezve bi-directional wafer butterfly valve munzvimbo idzi pasina kuchinja chiso nechiso.

Mushure mekukurukurirana kwedhipatimendi rehunyanzvi reTHT, takasarudza kushandisa yekutanga unidirectional yekuisa chisimbiso kugadzirisa iyo bi-directional sealing butterfly valve. Nekuda kweizvozvo, takabudirira, PN25 yakanaka kudzvanya kumashure kumanikidza 1: 1.