H41H/W不锈钢美标升降式止回阀

H11W升降式内螺纹止回阀

H41H/W美标升降式止回阀

HH46X、HH48X、HH49X微阻缓闭止回阀

H42X（DRVZ）*式止回阀

HQ45X微阻球形止回阀

HQ44X微阻球形止回阀

HH44X微阻缓闭止回阀

H44X（SFCV）橡胶瓣止回阀

H41X铜芯消声止回阀

H41X全铜消声止回阀

H74X对夹式薄型止回阀