Fire breathing valve in the system play a safe protective role. When the system pressure exceeds the specified value, the safety valve opens, part of the system gas into the atmosphere, so that the system pressure does not exceed the allowable value, thereby ensuring that the system is not too high pressure due to accidents. One is to reach a certain pressure, call or suction. The other is designed to simply call not suction. Can be understood as the use of two appropriate pressure one-way valve instead. Fire breathing valve not only can maintain the tank air pressure balance, ensure tank in overpressure or vacuum damage, and can reduce the tank medium and loss. This type of valve in the pipeline should generally be installed horizontally.
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