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mannesmann valves are special valves where the closing member is normally closed under external force. When the pressure of the medium in the equipment or pipeline rises above the specified value, the medium is discharged to the outside of the system to prevent the pressure in the pipeline or equipment from exceeding the specified limit. Safety valves belong to the category of automatic valves and are mainly used on boilers, pressure vessels, and pipelines to control pressure so that it does not exceed the specified value, playing an important protective role for personal safety and equipment operation. Note: Safety valves must undergo pressure testing before use. mannesmann valve functions and applications; safety valves in the system