다중 볼체크밸브 큰 사이즈 DN400 DN500을 미끄러지게 하는 연성 주철 GGG50

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