緩衝蝶型逆止閥採用大斜盤偏心和雙偏心結構設計。
裝有步進緩衝油缸，分兩級關閉，即快速關閉85% 6-90%（不受氣缸阻），緩慢關閉10% 6-15%（受氣缸阻）。
可調緩閉時間可達到消除水錘的最佳效果。
安裝在泵出口處，可防止停泵時發生破壞性水錘現象。
因此，該閥門可廣泛應用於市政、電廠、冶金、石化等行業的給排水系統。

The slightly retarded butterfly check valve is designed with a large swashplate eccentric and a double eccentric structure.
It is equipped with a step-by-step cushion cylinder for two-stage closure, i.e. it closes 85% 6-90% quickly (not damped by the cylinder) and then slowly closes 10% 6-15% (damped by the cylinder).
Adjustable slow-closing time can achieve the best result in eliminating water hammer.
Installation at the pump outlet can prevent destructive water hammer from occurring when the pump is stopped.
herefore, the valve can be widely used in water supply and drainage systems in municipal, power plant, metallurgy, petrochemical and other in­dustries.