Air vent valve is a common industrial equipment, which is widely used in various industrial fields, and can be used for exhausting and regulating the pressure of pipelines, equipments, containers and so on. Its role is mainly to control the flow and pressure of gases or liquids in the pipeline, to protect equipment and containers from the danger of excessive pressure or explosion. There are many types of exhaust valves, according to different utilization environment, divided into steam exhaust valve, air exhaust valve, hydraulic exhaust valve and so on.
The exhaust valve is mainly composed of valve body, valve cover, valve plate, spring, sealing ring and so on. It is through the opening and closing of the valve plate to realize the role of pipeline exhaust and pressure regulation. The sealing between the valve plate and the valve body is very important, because it must be able to ensure the reliability and safety of the exhaust valve under high temperature and high pressure. The working principle of the exhaust valve is simple, when the pressure in the pipeline exceeds the set value, the exhaust valve will automatically open to allow gas or liquid to escape, thus reducing the pressure inside the pipeline.
Exhaust valves are widely used in the chemical, metallurgical, electric power, pharmaceutical and food industries, among which the more widely used are steam exhaust valves. In thermal power plants, petrochemical plants, pharmaceutical factories and other industrial production processes, the need for a large number of steam or gas pressure regulation and exhaust, exhaust valve becomes an essential and important equipment. In addition, in the automotive, medical, environmental protection and other fields, exhaust valves also play an important role.