Safety valve(also called pressure relief valve) is according to the pressure system of the working pressure to realize the function of open and close automatically generally，it is installed in the closed system equipment or pipeline to protect the safety of system.
    When the inner pressure of the equipment or pipeline is more than the set pressure of the safety valve，it will open automatically to relieve the pressure and discharge part of the gas or fluid out of air or pipeline， make the system pressure does not exceed allowable valve， make sure that the medium pressure in the equipment and pipeline under the set pressure.
When pressure is reduced to the specified valve，safety valve wll automatically shutoff in time，to ensure the system have no accident because of high pressure.

One、basic structure
1.This product is enclosed structure that the medium been discharged is not leaked， and along the provisions of the outlet， is usedin corrosive medium.
2.The inner body and the internal parts which are in touch with medium are all lining.It has compact structure，flexible for opening and closing，strong corrosion resistance etc.

Two、design specification
It adopts GB/T12241/GB/T12243 standards.