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Illustration of the working principle of pneumatic ball valve: attached with internal structure diagram

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The pneumatic ball valve is a 90° rotating ball valve. Under the action of air source pressure, the pneumatic actuator (pneumatic head) pushes the rotating shaft through the piston to drive the valve stem to realize the switching and adjustment of the ball valve. The air pressure of pneumatic ball valves is generally 0.1-1.0MPa, and they are generally equipped with valve positioners, filter pressure reducing valves, solenoid valves, limit switches, pneumatic heads and other components. According to power outage or insufficient air pressure, the action of the pneumatic ball valve returns. Pneumatic ball valves are divided into two categories: single-acting and double-acting ball valves.

  The pneumatic ball valve is a 90° rotating ball valve. Under the action of air source pressure, the pneumatic actuator (pneumatic head) pushes the rotating shaft through the piston to drive the valve stem to realize the switching and adjustment of the ball valve. The air pressure of pneumatic ball valves is generally 0.1-1.0MPa, and they are generally equipped with valve positioners, filter pressure reducing valves, solenoid valves, limit switches, pneumatic heads and other components. According to power outage or insufficient air pressure, the action of the pneumatic ball valve returns. Pneumatic ball valves are divided into two categories: single-acting and double-acting ball valves.

  Internal structure diagram of pneumatic ball valve

  For the working principle diagram of a set of double-acting pneumatic ball valves, the compressed air (air source) first passes through the filter pressure reducing valve to remove the contained water, oil and solid dust particles, and adjust the system pressure to the set value to provide a Stable air source pressure. The gas enters the air inlet a of the solenoid valve, enters the pneumatic head from the air inlet b, and pushes the piston to move. The exhaust passage is d——E. After the coil is energized, the solenoid valve changes direction, and the gas flows into the pneumatic head from the air inlet d, pushing the piston to move in the opposite direction, and the exhaust channel is b-c.

  Single-acting pneumatic ball valve working principle diagram pneumatic head and solenoid valve.

  This is the working principle diagram of the single-acting pneumatic ball valve. Compared with the former, first the compressed air filters the pressure reducing valve and the solenoid valve coil. Electricity and air flow into the solenoid valve air inlet. From port b is the pneumatic head, which pushes the piston to move and the pneumatic spring is compressed. At the same time, when a failure occurs, it (loss of natural gas or electricity), the solenoid valve returns the spring, the air is blocked, the pneumatic spring releases the compression force, pushes the piston outward, the exhaust channel is b - c, which can be set in the ball valve in the open or closed position to prevent accidents.

Keywords in this article: Pneumatic ball valve

 


 

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