⑦to determine the parameters of the valve: the automatic valve, according to the different needs first to determine flow resistance allows discharge capacity, pressure, etc. , and then to determine the nominal pipe diameter and the diameter of the valve seat hole.
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Structure, work principle and service and maintenance of the automatic valve clearance ad-juster are introduced.
介绍了气门间隙自动调整器的结构、工作原理，以及其维护与保养。
Check valve before the valve is to use the pressure after poor hoist the automatic valve, it is the role of the media flows only in one direction, reverse and stop its flow.
止回阀是利用阀前阀后的压力差而自动启闭的阀门，它的作用是使介质只做一个方向的流动，而阻止其逆向流动。
Each hot water storage heater shall be equipped with an automatic temperature and pressure relief valve to protect the heater from excessive pressure and excessive temperature.
每个容积式热水器都应该配置一个自动温度压力安全阀，保护热水器不会压力太大和温度过高。
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