Safety valve in the opening and closing parts by external forces in a normally closed state, when the equipment or pipeline medium pressure rises above the prescribed value, is through the discharge of media to the outside of the system to prevent the pipeline or equipment medium pressure exceeds the prescribed value of the special valve. Safety valve belongs to the automatic valve category, mainly used in boilers, pressure vessels and pipelines, control pressure does not exceed the prescribed value, personal safety and equipment operation plays an important role in protecting.
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