Air compressor safety valve will become unsafe if you do not pay attention to these problems.
1. Under what circumstances can the air compressor safety valve not be used?
Whether a thing is useful or not, sometimes it depends on where it is. If it is not used well, it will be a big security risk. Air compressor safety valve is such a product, the following small series to tell you about the air compressor safety valve under which circumstances can not be used.
1. The pressure will increase rapidly, and the discharge speed of the safety valve will be less than the growth rate of the pressure.
2. When there are strict requirements for sealing.
3, the material inside the container will lead to the failure of the safety valve, such as the material inside the container contains a lot of solid particles, the safety valve will lead to a tight seal after returning to the seat.
4. When the materials in the container are highly toxic or otherwise obstructing the nature of public safety.
The above situation is not suitable for the use of safety valves alone, and it is necessary to use a rupture disc or a safety valve in combination with a rupture disc.
Second, the safety valve needs to be tested on time
Air compressor safety valve is an automatic valve. Its working principle is that when the air pressure in the air compressor or the pipeline rises above the specified value, the pressure of the pipeline or equipment medium will be prevented by discharging the medium outside the system. Special valves with specified values, when the control pressure does not exceed the specified value, can play an important role in the protection of air compressor operation and personal safety. According to the "Safety Valve Safety Supervision Regulations", the periodic verification of safety valves is generally at least once a year, and safety technical specifications should have corresponding regulations.
Air compressor safety valve calibration method:
1. Calibration station offline verification: It is necessary to install the safety valve on the calibration table, and then use the calibration medium to open the safety valve. Observe the pressure by checking the pressure gauge. However, this method cannot take into account the safety valve check of the back pressure relief valve and the high temperature or low temperature medium.
2. On-line instrument calibration: It is the external force that measures the spring force acting on the safety valve downwards, which can be used to calculate the opening pressure of the safety valve. This method generally does not affect the production and system pressure. The speed of detection is relatively fast and relatively convenient, but the method cannot detect the sealing performance of the safety valve.
3. Boost type jump method: the safety valve is installed in the system, the system is artificially boosted, until the safety valve takes off, to observe the opening pressure of the safety valve. This verification method damages the sealing surface of the safety valve. Larger, the risk of operation is also greater than others.
