止回阀是防止介质倒流的自动阀门，流体从进口侧流向出口侧。
Check valves are automatic valves to prevent the media back, fluid from the inlet to outlet side to side.
压力调节器 连接的电热水器出口侧的出口保持水箱的水压力超过预设的限制，因为它。
Pressure regulators are connected to the outlet side of the water heater to keep the water pressure from exceeding a preset limit as it exits the tank.
如果有一个阻尼器，比如在排出口侧放一个滤网或一个限制器，泵则会推动流体通过它们。
If there is a damper, such as the export side in the row by putting a filter or a limiter, will promote the pump fluid through them.
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