Compressed air actual if keep steam condition, won't cause system problems, if want to remove all of the water vapor in the compressed air is not only very expensive, and it is unrealistic.

压缩空气中的水气如果一直保持蒸气状态，就不会造成系统问题，若要驱除压缩空气中的所有水蒸气不仅十分昂贵，而且是不切实际的。

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The excess of water vapor condenses into visible moisture. Steam over a hot cup is an example.

过量的水汽凝结成可见的水雾，热水杯冒出的雾气即是一例。

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Separation of water and gas is reliable (water vapor enters from bottom of valve by the U general type), remain the state of water sealing in the valve, effectively prevent leakage of steam.

汽水分离可靠（水汽经U型普通从阀底部进入），阀内始终处于水封状态，有效阻止蒸汽泄漏。

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Geothermal power plants turn hot water into steam or vapor to run a turbine and generate electricity, after which the water is injected back into the underground geothermal reservoir.

FORBES: Scaling Geothermal in Central America