The gas injection micro-drain valve (vacuum breaker) is usually closed, but when the pressure of the line or vessel drops below atmospheric pressure, it opens quickly, drawing in a large amount of air, eliminating the interruption and bridging water hammer and preventing the formation of a vacuum. When positive pressure is restored, the injection micro-vent valve recloses and gradually expels the accumulated air. This valve is composed of two independent vacuum destruction valves and micro exhaust valves through the combination of connecting pipes, according to the overall product factory test, the suction area is 10% larger than the inlet area, in order to ensure rapid air intake.
The gas injection micro-vent valve (vacuum destruction valve) has three functions: high-speed suction, micro-venting and non-high-velocity exhaust. It can be applied to water hammer control, installed in locations where water column separation is likely to occur. The large-bore vacuum destruction valve is used in conjunction with the small-bore micro-vent valve, and the large valve opens due to the vacuum, allowing air to enter the void created by the separation of the filled water column. It then shuts down quickly to trap the compressed air and temporarily retain the air bag as a buffer to slow down the re-entry of the water column and minimize severe pressure fluctuations (water hammer) when the system pressure returns to positive pressure. At the same time, the small orifice air release valve also opens due to the vacuum and remains open to regulate the slow discharge of air from the pipe, gradually removing the accumulated air, so that the pipe gradually returns to normal working pressure without causing damage.
The principle of the gas injection micro drain valve (vacuum destruction valve) is that it can be opened or closed at the right time according to the pressure change of the pipeline or vessel. When the pressure drops below atmospheric pressure, the valve opens; When the pressure returns to a normal value, the valve closes. This automatic adjustment keeps the pressure in the line or vessel stable, avoiding damage to equipment and pipes.
Gas injection micro discharge valves (vacuum destruction valves) are used in a wide range of applications where pressure fluctuations and water hammer need to be controlled. For example, in the fields of water supply system, hot water system, air conditioning system, chemical system, etc., the gas injection micro discharge valve plays an important role. It can effectively protect pipelines and equipment from water hammer and pressure fluctuations, and improve the stability and reliability of the system.
In conclusion, the gas injection micro discharge valve (vacuum destruction valve) is a very important type of valve, which has a wide range of application prospects and market demand. With the continuous progress of science and technology and the continuous expansion of application fields, the technical level and performance requirements of gas injection micro discharge valves will continue to improve and improve. In the future, the gas injection micro discharge valve will be applied and promoted in more fields, bringing more convenience and benefits to human production and life.