With an asynchronous model, the queue itself ACTS as a relief valve.

借助异步模型，队列本身可以充当一个减压阀。

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A test and pressure relief valve should be installed to assure relief of internal pressure prior to servicing and as a visual indication of trap operation.

应该安装一个测试和压力安全阀，确保内部压力能够在维修前得到释放，并作为疏水阀工作的直观显示。

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As thermal expansion conditions develop, pressure builds up to the setting of the relief valve. This will cause discharging of small quantity of water.

随着热量的增加，压力也随着增加，并达到安全阀的压力设置。此时将导致安全阀排泄出少量的水。

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