阀可以通过调整操作在下面的空中通道室空气的压力。
Valves can be operated by adjusting the air pressure in a chamber below the air channel.
受管制的压力下保持稳定是通过不同的抽气管，可以调整与流速按照使用流量阀供应条件。
Stability of regulated pressure is maintained under varying flow conditions through the use of an aspirator tube which adjusts the supply valve in accordance with the flow velocity.
在不具备压力试验条件时，不允许拆掉换向阀的铅封和调整调压弹簧座。
In the lack of condition for the pressure test, it is not allowed to remove the lead sealing of the reversing valve to adjust the pressure regulating button.
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