止回阀的常见型号：对夹升降式止回阀：H71X、H71H；对夹蝶形双瓣止回阀：H76X、H76H；对夹圆片式止回阀：H74H、H74I、H74M；静音止回阀：H42H、H42W；微阻缓闭式止回阀：HH44H、HH46H、HH49H;橡胶阀瓣式止回阀：HC44X；消声止回阀：HC41H、HC41X、HC41T；升降式止回阀：H41H、H41W;旋启式止回阀：H44H、H44W； 止回阀适用场
