延性がある鉄GGG50の滑走の多ボール逆止め弁の大きいサイズDN400 DN500

Ductile Iron GGG50 Sliding Multi-Ball Check Valve Big Size DN400, DN500 Flanged Ball Check Valve uses the rubber covered roller as the disc, when, under the action of the medium, can roll up and down along with the integral sliding path inside the valve so as to open or close it. And it features by good tightness, silent close and no production of water hammer. The body is full water-flow path design, big flow, small resistance and the water head loss is smaller that of the