H42立式止回阀H42

HC41X消声止回阀HC41X

H44美标止回阀H44

H74H对夹单瓣旋启式止回阀H74H

H44H旋启式止回阀H44H

H41升降式止回阀H41

H71H对夹升降式止回阀H71H

HH46x、HDH48x、HH49X消声缓闭止回阀HH46x、HDH48x、HH49X

H44N/F天然气旋启式止回阀

H42N/F天然气立式止回阀

H44H,H41H美标止回阀

H41T,H44T铸铁止回阀