the relief valve sealing way and stop valve sealing way similar, but the sealing pressure relief valve is only the working pressure of 4 ° ~ 8 °, is much smaller than globe valves. In the maintenance of the relief valve, usually carefully grinding and fixed valve plug and seat, to ensure the sealing and sealing. When the relief valve normal downtime, usually a small amount of mixing of steam.

determine the implementation of the specifications of the valve. Because of the relief valve is often sold, it is often through many ways, such as purchasing department, engineering general contractor, designing institute, sales agents and valves. Actual user is difficult to design personnel to communicate directly with the safety valve manufacturers. The relief valve is designed for high temperature steam condition design of the relief valve. It is specifically designed to deal with the structure of the high temperature steam corrosion and corrosion.

this is usually specified in the material delivery, or directly in the manufacturers instructions. Second, the choice of the spring. Spring safety valve itself is a low pressure valve valve, the sealing force is almost completely provided by the spring. Therefore, the spring is particularly important. Is not necessarily high temperature under normal temperature and constant pressure, will not leak; Spring stiffness is affected by temperature. The higher the temperature, the spring more soft; General manufacturing chamber of commerce to consider the effects of high temperature in spring. Under the cold calibration valve set pressure, and then get cold test pressure difference; When in the pot, use cold test pressure difference. But according to the cold test, sometimes do not check differential pressure. In this case, the valve set pressure will be reduced, in addition, there is another important factor. Spring is subjected to overheating and factory before the ring compression test, or heat and pressure test; This test is to ensure that in the process of winding spring of residual stress released in full and will not be used. The condition of the free height of spring becoming increasingly short. Finally, if you want to simply solve the problem, please contact the manufacturer directly, and truthfully report the situation.

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