Chifukwa cha kusankha kwa zinthu zosindikiza ndi EPDM kapena NBR.Vavu yotsekera pachipata chofewa ingagwiritsidwe ntchito pa kutentha kwakukulu kwa 80 ° C.Nthawi zambiri amagwiritsidwa ntchito m'mapaipi opangira madzi amadzi ndi madzi otayira.Ma valve otsekemera otsekemera amapezeka m'mapangidwe osiyanasiyana, monga British Standard, German Standard, American Standard.Kuthamanga mwadzina kwa valve yofewa ndi PN10,PN16 kapena Class150.