美妙人妇系列1～100,亚洲国产AV一区二区三区四区,亚洲国产精品色情777777,亚洲中文久久精品无码1

DRVZ(H42X) silent check valve is mainly composed of valve body, seat, guide body, disc, bearing and spring and other main parts. The internal flow passage adopts linear design with minimal pressure loss.The opening and closing stroke of the valve disc is very short. It can be closed quickly when the pump stops to prevent the huge water hammer sound. It has the characteristics of quiet closing.The valve is mainly used for water supply and drainage, fire fighting, hvAC system, can be installed in the pump outlet, to prevent backflow and water hammer damage to the pump.

Product model: DRVZ
Nominal diameter: DN40~600mm
Nominal pressure: PN1.0~ 2.5MPa
Applicable temperature: 0~80℃
Suitable medium: water
Main material: cast iron, ductile iron, carbon steel, etc