Working principle and purpose of the product:

Spring micro opening external thread safety valve is suitable for equipment or pipelines with working temperature ≤ 200 ℃ for media such as air, ammonia, petroleum gas, etc. A21W-P and R types are suitable for use as overpressure protection devices on equipment or pipelines with corrosive gases or liquids at temperatures ≤ 200 ℃. KA21Y type is suitable for liquefied petroleum gas with a temperature ≤ 100 ℃.

Product Structure Features:

1. The spring micro opening safety valve has a lightweight and compact structure, high sensitivity, and unrestricted installation position,

2. It has low sensitivity to vibration, so it can be used on mobile pressure vessels.

3. The applied load will change with the opening of the valve, that is, as the valve disc rises, the compression of the spring * and the force acting on the valve disc also increase. This is not conducive to the rapid opening of the safety valve.

4. The spring on the valve will experience a decrease in elasticity due to long-term exposure to high temperatures. When used on containers with high temperatures, it is often necessary to consider the insulation or heat dissipation of the spring, which makes the structure more complex