HQ45X微阻球形止回阀HQ45X

HH46X微阻缓闭蝶式止回阀HH46X

H76对夹双辩蝶式止回阀H76

HX44X橡胶瓣止回阀HX44X

H42N燃气立式止回阀H42N

H41Y、H44Y锻钢法兰端止回阀H41Y、H44Y

H44美标止回阀H44

H44H旋启式法兰止回阀H44H

H41H升降式法兰止回阀H41H

H41F46升降式衬氟止回阀H41F46

H40F46升降立式衬氟止回阀H40F46

HH46X、HDH48X、HH49X微阻缓闭消声止回阀HH46X、HDH48X、HH49X