Pneumatic aluminum alloy ball valves are widely used in industry. The following is the introduction of pneumatic aluminum alloy ball valve knowledge and working principle by Anlai Petrochemical.
Pneumatic aluminum alloy ball valves have evolved from plug valves. It has the same 90 degree rotation, except that the plug body is a sphere with a circular through hole or passage through its axis. The ratio of the spherical surface to the passage opening should be such that when the ball is rotated 90 degrees, the spherical surface should be entirely present at the inlet and outlet to intercept the flow. This type of valve can be installed in any position in the pipeline.
The pneumatic ball valve is a ball valve with a pneumatic actuator. Pneumatic actuators perform relatively fast, with the fastest switching speed of 0.05 sec/time, so it is often called a pneumatic quick-disconnect ball valve. Pneumatic ball valves are usually equipped with various accessories, such as solenoid valves, gas source treatment triples, limit switches, positioners, control boxes, etc., to achieve local control and long-distance centralized control, and the valve can be controlled in the control room. .
The working principle of pneumatic aluminum alloy ball valve is as follows:
1. When the pneumatic actuator is connected to the circuit and the system air source, the air enters the A cylinder (B cylinder) through the pipe A or B pipe to push the piston to move to one end, thereby driving the rotating shaft and the core to rotate 90°.
2. The top of the pneumatic actuator is linked to the visual device. When the green mark points to the word "ON", the valve is opened.
3. The signal of the reply signal is green when the valve is in the open position, and when the red light is on, the valve is in the closed position.
4. The positioner can adjust the flow of the valve pipe. 5. The valve seat adopts the elastic sealing structure, the seal is reliable, and the opening and closing is easy.
6. The valve stem adopts a bottom-loading structure with an inverted seal. When the valve cavity is abnormally boosted, the valve stem will not be impacted.
7. Pneumatic piston actuator is made of low-friction material as bearing sleeve. The inner and outer surfaces of the cylinder are hard anodized and anti-corrosive, which greatly improves the service life of the cylinder.
It is widely used in fluid control or regulation control of natural gas, oil, chemical, metallurgy, papermaking, electric power, mining, printing and dyeing, bio-pharmaceutical, household chemicals, food and beverage, water treatment and air treatment industries, and is used with automatic pneumatic instruments. .
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