HH46X微阻缓闭蝶式止回阀

H76对夹双辩蝶式止回阀

H44N天燃气专用旋启式止回阀

H14W内螺纹旋启式止回阀

H74对夹单瓣旋启式止回阀(超薄型)

H76凸耳对夹双瓣旋启式止回阀

铸铁升降式止回阀

H71对夹单瓣升降式止回阀

H41N燃气专用升降式止回阀

H61H自密封升降式止回阀

H61H锻钢升降式止回阀

H41N液化气升降式止回阀