As a pressure relief valve, it can maintain the water pressure in the set way below the safe value;
作泄压阀用时，可维持供水路压力在设定的安全值之下；
When the pressure to a safe value, the pressure relief valve closes automatically.
当压力恢复到安全值时，泄压阀自动关闭。
When the pressure to a safe value, the pressure relief valve closes automatically.
当压力恢复到安全值时，泄压阀自动关闭。
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