The safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the pressure of the medium in the equipment or pipeline rises beyond the specified value, it discharges the medium to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value.
Safety valves are unsetmatic valves, mainly used in boilers, pressure vessels and pipelines to control the pressure not to exceed the specified value, which plays an important role in protecting personal safety and equipment operation. NOTE The safety valve must be pressure tested before it can be used.
* There are two main types of safety valve structures: spring type and lever type.
* With the need of large capacity, there is another kind of pulse safety valve, also known as pilot safety valve, which consists of main safety valve and auxiliary valve.
* The discharge volume of the safety valve is determined by the diameter of the valve seat and the opening height of the valve disc. It can also be divided into two types: micro-opening type and full-opening type.
* In addition, there are closed and unclosed types depending on the requirements of use.
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