The fire-resistant breathing valve with double pipe is installed on the roof of indoor fixed storage tank. It can automatically adjust the internal and external pressure difference of oil storage tank, and its performance is stable.
The nominal pressure of the relief valve is determined by the operating pressure, the application temperature range of the safety valve is determined by the operating temperature, the constant pressure value of the safety valve calculated by the disc determines the constant pressure range of the spring or lever, and then the material and structural type of the relief valve are determined according to the application medium, and the throat diameter of the safety valve is calculated according to the relief valve discharge plate. The following is the general rules of safety valve selection.
