300X300X缓闭止回阀

H61,H11,H41锻钢止回阀

H71H对夹升降式止回阀

H44X（SFCV）橡胶瓣止回阀

H41T,H44T铸铁止回阀

HH47X缓闭蝶形止回阀

HH46x、HDH48x、HH49X消声缓闭止回阀

H44H旋启式止回阀

HC41X消声止回阀

H41H升降式止回阀

H41H美标止回阀

H42H立式止回阀