Plate heel is lifted first by design to prevent seat wear. Employs two spring- Ioaded plates with flat seats - Gives superior performance and bubble-tight shutoff with resilient seats.

• 在结构设计上首先提起阀瓣根部,防止阀座磨损。在平阀座上采用两个弹簧-负载阀瓣。-性能优异,具有气密性关闭性能的弹性阀座。