Spring-type micro-valve safety valve is the use of compression spring force to balance the role of the valve flap force. The amount of compression of the helical coil spring can be adjusted by turning the adjusting nut above it, with which it is possible to correct the opening (setting) pressure of the safety valve as required. Spring micro-Kai safety valve structure lightweight and compact, high sensitivity, the installation position is not limited, and because of the sensitivity of vibration is small, so it can be used for mobile pressure vessels. The disadvantage of this type of safety valve is that the applied load changes with the opening of the valve. As the valve flap rises, the amount of compression of the spring increases and the force acting on the valve flap also increases. This is a detriment to the quick opening of the safety valve. In addition, the spring on the valve will reduce the spring force due to the long-term high temperature. When used on a container with a high temperature, the structure is complicated by the fact that the problem of heat insulation or heat dissipation of the spring is often taken into consideration. More Keyword Search: Safety Valve