The function of the spring safety valve is to play a safety protection role in the system. When the system pressure exceeds the specified value, the safety valve opens and part of the gas/fluid in the system is discharged into the atmosphere/pipeline so that the system pressure does not exceed the allowable value so as to ensure that the system does not cause an accident due to excessive pressure.
Spring micro-opening safety valve, spring micro-opening safety valve uses the force of the compression spring to balance the force acting on the valve disc. The compression amount of the coil spring can be adjusted by turning the adjusting nut on it. With this structure, the opening (setting) pressure of the safety valve can be corrected as required. The spring micro-opening safety valve has a light and compact structure, and its sensitivity is relatively high. The installation position is not limited, and because of its low sensitivity to vibration, it can be used on mobile pressure vessels. The disadvantage of this safety valve is that the applied load will change with the opening of the valve, that is, as the valve disc rises, the compression of the spring increases and the force acting on the valve disc also increases. This is detrimental to the rapid opening of the safety valve. In addition, the spring on the valve will reduce the elastic force due to the long-term influence of high temperature. It is often necessary to consider the thermal insulation or heat dissipation of the spring when used on a container with a high temperature, which complicates the structure
The opening height of the full-lift safety valve is greater than or equal to 1/4 of the diameter of the flow channel. The discharge area of a full lift safety valve is the minimum cross-sectional area of the throat of the valve seat. Its action process belongs to the two-stage action type and must rely on a lift mechanism to achieve full opening. The full lift safety valve is mainly used for gas medium occasions.
