Posachedwapa, tapanga valavu yagulugufe yamitundu iwiri yamakasitomala aku Japan, sing'angayo ikuzungulira madzi ozizira, kutentha + 5 ℃.

Makasitomala adagwiritsa ntchito valavu yagulugufe ya unidirectional, koma pali malo angapo omwe amafunikira valavu yagulugufe ya bi-directional, kotero kasitomala wathu adatipempha kuti tiperekenso valavu yagulugufe yamagulugufe omwe ali ndi mbali izi popanda kusintha miyeso ya nkhope ndi nkhope.

Pambuyo pa zokambirana za dipatimenti yaukadaulo ya THT, tidaganiza zogwiritsa ntchito chikombole chosindikizira choyambirira kuti tichite valavu yagulugufe yosindikizira yabi-directional.Zotsatira zake, tidachita bwino, PN25 yabwino kukakamiza kumbuyo 1: 1.