Pneumatic ball valves are widely used in petroleum, chemical plants, power generation, paper industry, nuclear energy, airlines, rockets and other units, and their daily life. Pneumatic ball valve is a kind of gate valve with pneumatic electric actuator, and the pneumatic electric actuator has a relatively fast speed and a faster switching speed, which is 0.05 seconds/time, so it is generally called a pneumatic quick disconnect gate valve. Pneumatic ball valves are generally equipped with various accessories, such as relays, pneumatic valve solutions, trip switches, positioners, control cabinets, etc. , and then complete the local manipulation and remote control of the centralized control system. The gate valve power switch can be operated in the main control room, without manual intervention on the spot or in plateau areas and risk areas, which saves human resources, time and safety to a great extent.

Working principle of pneumatic ball valve:

Pneumatic ball valve can only be closed by rotating 90 degrees with pneumatic actuator under the function of pneumatic valve and small rotational torque. The completely identical inner wall of the oil circuit board provides the medium with a safe passage for immediate fluidity with little frictional resistance.

In general, ball valves are suitable for immediate opening and closing. The main features of the ball valve are compact structure, convenient operation and maintenance, and can be used with common working media such as strong electrolyte, organic solvent, acid, gas, etc. It is also suitable for standard extreme media such as CO2, hydrogen peroxide, methane gas, butadiene, etc. . The oil circuit board of the ball valve can be integral or it can be composed.

Pneumatic ball valve classification:

floating ball

The ball of the pneumatic ball valve floats. Under the effect of high pressure, the ball can cause a certain offset and press on the protruding surface of the outlet side to ensure the sealing of the outlet side.

fixed ball

The ball of the balloon valve is fixed and will not move when pressed. The fixed ball valve has a floating seat that moves when under pressure from the medium, pressing the sealing ring against the ball to ensure a seal.

Usually, bearings are installed on the upper and lower shafts of the ball, and the operating torque is small, which is suitable for high-pressure and large-diameter valves. Q647F/H/Y fixed ball valve, in order to reduce the operating torque of the balloon valve and improve the reliability of the seal, special lubricating oil is pressed between the sealing surfaces to improve the sealing performance and reduce the operating torque. It is also suitable for high-pressure and large-diameter ball valves .

bouncy ball

The ball of the balloon valve is very elastic. The ball and valve seat seals are made of metal materials, the specific pressure of the seal is large, and the pressure of the medium itself cannot meet the sealing requirements, and external force must be applied. This valve is suitable for high temperature and high pressure medium.

The elastic sphere is provided with elastic grooves at the lower end of the inner wall of the sphere to obtain elasticity. After closing the channel, the ball is inflated with the wedge head of the valve stem and pressed against the valve seat to seal. Loosen the wedge head before turning the ball, the ball will return to its original shape, and a tiny gap will be created between the ball and the valve seat, which can reduce the friction and operating torque of the sealing surface.

Balloon valve is divided into linear type, three-way type and right-angle type according to its channel position. The latter two ball valves are used to distribute media and change the flow of media

Features of pneumatic ball valve:

Pneumatic ball valves are mainly used to cut off or put the medium in the pipeline, and also used for fluid regulation and control. Compared with pneumatic control valves and other types of valves, pneumatic ball valves have angular stroke output torque, open quickly, smoothly and reliably, and can be widely used.

1. Pneumatic ball valve with low liquid frictional resistance is a gate valve with low liquid frictional resistance among all gate valve types. Even if it is a pressure-relieving pneumatic ball valve, its liquid frictional resistance is very small.

2. The thrust ball bearing reduces the friction torque of the valve seat, making the long-term operation of the valve seat stable and flexible.

3. The high-pressure gate valve has good sealing properties. The sealing ring made of ductile raw materials such as polytetrafluoroethylene is convenient for sealing, and the sealing working ability of the pneumatic ball valve is improved with the increase of the working pressure of the material.

4. The valve seat has reliable sealing performance. Because the valve seat only does rotating exercise, not left and right exercise, the rotating seal of the valve seat is not easy to be damaged, and the sealing working ability is improved with the increase of material working pressure.

5. Materials such as polytetrafluoroethylene have good self-lubrication, and the friction loss with the ball is small, so the balloon valve has a long life.

6. Anti-static function: A spring is set between the ball, the valve stem and the valve body, which can export the static electricity generated during the switching process.

7. The protruding section of the bottom-mounted valve stem and the head of the valve stem prevents the ejection of the valve stem, the sealing damage of the valve stem caused by fire, etc., and forms metal contact between the convex section and the valve body, which can ensure the sealing of the valve stem .

Working principle of pneumatic ball valve:

Pneumatic ball valve can only be closed by rotating 90 degrees with pneumatic actuator under the function of pneumatic valve and small rotational torque. The completely identical inner wall of the oil circuit board provides the medium with a safe passage for immediate fluidity with little frictional resistance.

In general, ball valves are suitable for immediate opening and closing. The main features of the ball valve are compact structure, convenient operation and maintenance, and can be used with common working media such as strong electrolyte, organic solvent, acid, gas, etc. It is also suitable for standard extreme media such as CO2, hydrogen peroxide, methane gas, butadiene, etc. . The oil circuit board of the ball valve can be integral or it can be composed.