Safety valve: a valve that protects the system from being damaged due to excessive pressure. Once the medium pressure in the system pipeline or device exceeds the set value, the pressure will be automatically released to achieve the purpose of safety protection.
There are two main types of safety valve structures: spring type and lever type. Spring type means that the sealing between the valve disc and the valve seat depends on the force of the spring. The lever type relies on the force of a lever and a heavy hammer. 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.
When the medium pressure in the pipeline exceeds the specified pressure value, the auxiliary valve is opened first, the medium enters the main safety valve along the conduit, and the main safety valve is opened to reduce the increased medium pressure.
The discharge volume of the safety valve is determined by the diameter of the valve seat and the opening height of the valve disc. The full opening is (1/3)～(1/4).
In addition, there are closed and non-closed styles depending on the usage requirements. The closed type means that the discharged medium does not leak out, and all of it is discharged along the specified outlet. It is generally used for toxic and corrosive media. no
