Pneumatic Three-way Ball Valve

Description

Data Sheet

-Reduced port T port /L port, 1/4’~3″ (DN6~DN80)
– W.P.： 1000WOG （PN63）
– W.T.:-20°C~180°C
– Investment casting
– Blow -out proof stem
– Live-loading design
– Anti-static device (option)

Here are some characteristics and advantages of pneumatic ball valves:

1. Automation Control: Pneumatic ball valves use pneumatic actuators such as pneumatic pistons or pneumatic gears to control the opening and closing operations of the ball valve. By connecting them to an automation control system such as PLC or DCS, remote or automatic control can be achieved, enhancing the level of system automation.
2. Fast Response and Operation: Pneumatic ball valves have quick response times, allowing for rapid opening or closing of fluid channels. This makes them particularly useful in applications that require fast fluid shut-off or real-time control.

However, there are some disadvantages to consider:

1. Need for Air Supply: Pneumatic ball valves require an external air supply, typically driven by compressed air or gas to operate the actuator. This necessitates the establishment of an air supply system.
2. Higher Equipment Cost: Compared to manually operated valves, pneumatic ball valves have higher equipment costs, including the actuator, air supply system, and control system, which increase the investment cost of the system.
3. Maintenance and Care: The actuators and control components of pneumatic ball valves require regular maintenance and care, including cleaning, lubrication, and servicing, to ensure their proper functioning and reliability.
4. Dependency on Air Pressure: The operation and performance of pneumatic ball valves are dependent on the stability of the air supply pressure. If the air supply pressure is unstable or interrupted, it may affect the normal operation of the valve.

The working principle of a pneumatic ball valve is as follows:

1. Compressed Air Supply: Pneumatic ball valves require an external supply of compressed air, typically provided through an air supply system.
2. Pneumatic Actuator: The key component of a pneumatic ball valve is the pneumatic actuator, consisting of a cylinder and a piston. When the pneumatic actuator receives a compressed air signal, the piston inside the cylinder experiences thrust, thereby driving the opening or closing action of the valve.
3. Valve Body and Ball: Inside the valve body of a pneumatic ball valve, there is a ball connected to the piston through a bearing structure. When the piston is driven, the ball rotates, altering the degree of opening and the fluid flow direction within the valve body.
4. Air Signal Control: The operation of a pneumatic ball valve is controlled through an air signal. Electromagnetic valves or pneumatic control valves are commonly used to control the opening and closing of the air supply. When the air signal reaches the pneumatic actuator, the piston experiences thrust and rotates together with the ball, achieving the opening or closing of the valve.
5. Control System: Pneumatic ball valves can be integrated with control systems such as PLC or DCS to enable remote or automatic control. The control system sends signals to the air supply system to control the opening and closing actions of the pneumatic ball valve.

In summary, the working principle of a pneumatic ball valve involves converting the compressed air signal into the opening and closing actions of the valve through the pneumatic actuator. The rotation of the ball controls the flow or shut-off of the fluid. Pneumatic ball valves offer fast response and automation control, making them widely used in various fluid control systems.