Air compressor safety valve is suitable for air medium with working temperature ≤200℃. It is a special safety valve for air compressor. When the pressure in the equipment exceeds the allowable value, the safety valve will automatically open, and then discharge in full. When the pressure drops to the specified value, The safety valve is automatically closed to protect the safety of the equipment. The working principle of the safety valve is so simple, its function is to protect the normal operation of the air compressor equipment. The air compressor safety valve is generally the last protective spare part on the equipment, so there are not many opportunities for the air compressor safety valve to open, but some air compressors are different, such as mining piston air compressors. The safety valve installed on the machine will often open to discharge pressure. The piston air compressor used in mines is simple and durable in workmanship, and its control is also relatively convenient. Generally, its working pressure range is about 0.5-0.7Mpa. Most of the mining piston air compressors are driven by diesel engines. When the pressure reaches the rated range when it is working, the spring of the safety valve will be pushed up. Since this kind of machine is not controlled by a pressure switch, it mainly depends on the discharge pressure of the safety valve to maintain a certain pressure range, so in this case, the opening and closing of the safety valve of the air compressor will be very difficult. Frequently, its function is to unload the overpressure in the equipment, thereby protecting the normal operation of the air compressor.