重力球形止回阀可以变为通风阀，只需用漂浮球体更换标准球体，然后在安装时将阀门倒置，使其阀座向上即可。

Gravity ball check valves are converted to vent valves by replacing the standard ball with a floater ball and inverting the valve at installation-with seat up.

youdao

重力球形止回阀可以变为通风阀，只需用漂浮球体更换标准球体，然后在安装时将阀门倒置，使其阀座向上即可。

Gravity ball check valves are converted to vent valves by replacing the standard ball with a floater ball and inverting the valve at installation-with seat up.

youdao