... boilor check valve seat 止回阀座 check valve ball seat 止回阀球座 check valve seat 止回阀座 ...
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check-valve ball seat 止回阀球座
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.
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。
The control valve comprises an oil nozzle and a check valve. The check valve comprises a valve ball and a valve seat.
本控制阀包括油嘴和单流阀，单流阀包括阀球和阀座。
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