Emergency shut down pneumatic operated ball valve

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Pneumatic ball valve is equipped with pneumatic actuator. Pneumatic actuator is relatively fast in execution, with the fastest switch speed of 0.05s/time, so it is also called pneumatic quick cut-off ball valve.

Pneumatic ball valve is usually equipped with various accessories, such as solenoid valve, gas source treatment triplet, limit switch, positioner, control box, etc., to realize local control and remote centralized control. The valve can be controlled in the control room, without running to the site for manual control, which greatly saves human resources and time, and improves safety. According to the material classification, pneumatic ball valves are: stainless steel pneumatic ball valve, plastic pneumatic ball valve, carbon steel pneumatic ball valve, cast iron pneumatic ball valve, etc. According to the number of ports, pneumatic ball valves are: two way ball valve, three way ball valve and four way ball valve.

Pneumatic ball valve can be closed tightly only by the operation of turning 90 degrees with the air source of the pneumatic actuator and a small turning torque. The completely equal inner cavity of the valve body provides a small resistance and straight passage for the medium. It is generally believed that the ball valve is the most suitable for opening and closing directly, but in recent development, the ball valve has been designed to throttle and control the flow. The main features of ball valve are compact structure, easy operation and maintenance, suitable for water, solvent, acid, natural gas and other media, such as oxygen. The ball valve body can be integral or combined.

The pneumatic ball valve can be closed tightly only by the operation of turning 90 degrees with the air source of the pneumatic actuator and a small turning torque. The completely equal inner cavity of the valve body provides a small resistance and straight passage for the medium. It is generally believed that the ball valve is the most suitable for opening and closing directly, but in recent development, the ball valve has been designed to throttle and control the flow. The main features of ball valve are compact structure, easy operation and maintenance, suitable for water, solvent, acid, natural gas and other media, such as oxygen. The ball valve body can be integral or combined.

The working principle of pneumatic ball valve is to rotate the ball to make the valve unblocked or blocked. Pneumatic ball valve has the advantages of light switch, small volume; large size, reliable sealing, simple structure, convenient maintenance; sealing surface and spherical surface are often closed, and not easy to be eroded by medium, so it is widely used in various industries.

Pneumatic ball valve is mainly used in pipeline to cut off medium fast, distribute and change the flow direction of medium. Pneumatic ball valve is a new type of valve widely used in recent years. It has the following advantages:

1. The fluid resistance is small, and its resistance coefficient is equal to that of the same length of pipe section.

2. Simple structure, small volume and light weight.

3. It is tight and reliable. At present, the sealing surface material of ball valve is widely used in plastic, with good sealing performance, and also widely used in vacuum system.

4. It is easy to operate and fast to open and close. It only needs to rotate 90 ° from full open to full close, which is convenient for remote control.

5. The maintenance is convenient, the structure of the pneumatic ball valve is simple, the sealing ring is generally movable, and the disassembly and replacement are relatively convenient.

6. When the valve is fully open or closed, the sealing surface of the ball and the valve seat shall be isolated from the medium. When the medium passes through, the corrosion of the valve sealing surface will not be caused.

7. It has a wide range of applications, ranging from small diameter to several millimeters and large diameter to several meters, from high vacuum to high pressure.

8. Because the power source of pneumatic ball valve is gas, generally 0.2-0.8MPa pressure, which is relatively safe. If the pneumatic ball valve leaks, the gas can be discharged directly compared with the hydraulic and electric ones, which has no pollution to the environment and high safety.

9. Compared with the manual and gearbox operated ball valves, the pneumatic ball valve can be configured with large size ball valves. (Manual and gearbox operated ball valves are generally under Size DN300, but the pneumatic ball valve can reach size DN1200 at present.)

Pneumatic ball valve has been widely used in petroleum, chemical industry, power generation, papermaking, aviation, rocket and other departments, as well as in people's daily life.

Manufacturer: ZIPO VALVE & PUMP CO., LTD