FLOWSPEC DHH44X micro-resistance slow closing silent check valve is mainly applicable to industrial and urban water supply and drainage, high-rise residential, luxurious hotel and boosting water station pump outlet. Taking serious consideration of environmental conditions, DHH44X micro-resistance slow closing silent check valve adopts tilting butterfly disc structure in order to achieve no vibration or noise and smooth operation, making sure the hotel or residential has quiet environment. And even more it has energy saving effects.
DHH44X micro-resistance slow closing silent check valve adopts delaying the valve close to make partial backflow discharge into the system, and then it reduce greatly the backflow impact force because of pump stop, achieving destructive water hammer elimination. Because its sealing adopts NBR, DHH44X micro-resistance slow closing silent check valve has many advantages, such like good sealing, wear-resisting, long service life and convenient maintenance.
Nominal pressure: 10bar/16bar/25bar/class125/class150/class250
Nominal size: DN200 (8”) ~ DN2000 (80”)
Design & manufacturing: FS-2000
Face to face: GB/T 12221
Flanged ends: GB/T 17241.6, GB/T9113, ANSI B16.1, ANSI B16.5, DIN2501, BS4504, EN1092-2
Inspection & test: GB/T13927, API598
Applicable medium: water, sea water, sewage
Applicable temperature: 0~80℃
Materials: cast iron, ductile iron, cast steel