Ball Valve was released in the 1950s. With the rapid development of science and technology with the ball valve, the continuous improvement of production technology and product structure has rapidly developed into a major valve category in just 40 years.In countries with developed Western industries, the use of ball valves is continuously rising year by year.In my country, ball valves are widely used in oil refining, long -term pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipalities, steel and other industries, occupying a pivotal position in the national economy.It has a 90 -degree action, the rotor body is a sphere, with a circular pore or channel.
The role of the ball valve
The role of the ball valve is mainly to cut off the flow, distribution flow rate, and change the flow direction. It can rotate ninety degrees.There are many functions of the ball valve, and it can also be used as a switch.In my country, ball valves are widely used in oil refining, long -term pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipalities, steel and other industries, occupying a pivotal position in the national economy.It has a rotating 90 degrees, the rotor is a sphere, and the circular pores or channels pass through its axis.The ball valve is mainly used in the pipeline to do the flow direction of cutting, allocation, and changing the medium. It only needs to use the operation of 90 degrees and a small rotation torque to close it.The ball valve is most suitable for switch, cutting valve, V -type ball valve.In addition to paying attention to the pipeline parameters, the electric valve should pay special attention to the environmental conditions it use. Because the electric device in the electric valve is a electromechanical equipment, its use status is greatly affected by its environmental environment.Usually, electric ball valves and butterfly valves should be paid special attention to the following environment.
Principles of ball valve
The ball valve can control the internal partition of the pipeline or Unicom in the pipeline or waterway.Can effectively control the circulation of liquid and gas.You only need to gently rotate the valve stem to play a role in controlling the flow. In addition, the closure of the ball valve is good, so it is very convenient to use.The sphere of the ball valve also reflects its working principle.The surface of the sphere of the ball valve will be covered with a layer of glue film. Whenever the switch is needed, this layer of film will play a very good closed effect, which can fill the gap between the sphere and the valve wall to prevent the flow of water from leaking out.Therefore, the ball valve has a very good confinement.
Ball valve structure
The sealing is good, but the load of the sphere to bears the working medium is passed on to the export sealing ring. Therefore, whether the sealing ring material can withstand the workload of the sphere medium. When it is impacted by high pressure, the sphere may offset.EssenceThis structure is generally used for low -voltage ball valves.The sphere of the valve fixed ball valve is fixed, and the movement is not generated after pressure.The fixed ball valve has a floating valve seat. After being under pressure from the medium, the valve seat is moved, so that the sealing ring is pressed on the sphere to ensure the seal.It is usually equipped with axia on the upper and lower axles of the sphere. It operates with small torque and is suitable for high -pressure and large -caliber valves.
Ball valve model
1. Classification according to the role and use (1) Tripping valve: The truncation valve is also called a closed valve. Its function is to connect or cut off the medium in the pipeline.The cut -off valve class includes the gate valve, the deeper valve, the rotor valve, the ball valve, the butterfly valve, and the diaphragm valve.(2) Stop valve: The stopper valve is also called one -way valve or inverse stop valve. Its role is to prevent the medium in the pipeline.The bottom valve of the water pump water absorption is also a stop valve class.(3) Safety valve: The role of the safety valve class is to prevent the medium pressure in the pipeline or device exceed the specified value, so as to achieve the purpose of safety protection.2. Classification according to the nominal pressure (1) vacuum valve: refers to a valve that work pressure is lower than the standard atmospheric pressure.(2) Low pressure valve: Refers to valve valves that are called pressure PN ≤ 1.6MPa.(3) Mid -pressure valve: Refers to valve valves that PN is 2.5, 4.0, and 6.4MPa.

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