H72H,H72Y对夹立式止回阀

HH44X微阻缓闭止回阀

HH46X,HH48X,HH49X微阻缓闭蝶式止回阀

HH46X,HH48X,HH49X微阻缓闭消声止回阀

HH46X,HH48X,HH49X微阻缓闭蝶形止回阀

HH44X微阻缓闭式止回阀

H48H截止止回阀

H42H,H42W铸钢立式止回阀

H42H,H42W碳钢立式止回阀

H42H,H42Y高压立式止回阀

H44Y法兰式高压止回阀

H44H,H44W不锈钢高压止回阀