As an automatic pressure release device used on pressurized equipment or pipelines, the spring safety valve has the advantages of light and compact structure, high sensitivity, unlimited installation position and poor sensitivity to vibration. The spring safety valve is widely used in high, medium, low pressure boiler and pressure vessels. As a safety pressure relief device, the safety valve must be able to open sensitively, sufficiently discharge, return to the seat in time, and seal reliably during the action process.

However, actually, it often causes many accidents due to the improper selection, installation, use and adjustment, which will influence its effect and life. In severe cases, it will affect the stable operation of the device, and even affect the safety of operators and equipment.