H41H升降式止回阀

HC41X铜消声止回阀

H77H对夹单瓣蝶型止回阀

H76X软密封蝶型止回阀

HH44X微阻缓闭止回阀

HQ44X微阻球形止回阀

HDH47X蝶式缓冲止回阀

HH49X微阻缓闭蝶型消声止回阀

HC44X（SFCV）橡胶瓣止回阀

H42X（DRVZ）*式止回阀

HC41X消声止回阀