Comparison between the characteristics of lever safety valve and spring safety valve: the structure of lever safety valve is huge, the axis of valve disc must be kept vertical to the horizontal plane during installation, the structure of spring safety valve is exquisite, and the installation position is not strict; the start-up of lever heavy hammer safety valve, that is, when the valve disc rises, the force of heavy hammer acting on the valve disc is smaller and smaller, but in spring safety In the whole valve, the higher the valve disc rises, the greater the spring force on the valve disc;

The opening pressure of the lever heavy hammer safety valve is constant when it works at high temperature. Therefore, it is suitable for high temperature medium. Under the influence of long-term high temperature and load, the elasticity coefficient of the spring safety valve will change and the spring pressure will decrease, which will reduce the starting pressure, so it is not suitable for high temperature environment.