Combination ball valves can be customized
The structure characteristics of pneumatic ball valve
by：AIRWOLF
2021-01-15
Pneumatic ball valve is ball valve with pneumatic actuator.
Its working principle is to rely on rotary valve core to keep the valve open or closed.
Pneumatic ball valve switch lightweight, small size, can make a large caliber, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, has been widely used in various industries.
pneumatic ball valve in the line is mainly used for cutting speed is quick, distribution, and change the flow direction of medium. Pneumatic ball valve is a new type of valve and its structure characteristics are divided into the following points:
1. Pneumatic actuators: the new type of pneumatic actuator, double acting and single acting ( Spring return) With gear and rack driving, safe and reliable; Large diameter valve adopts pneumatic actuator transmission fork type, reasonable structure, large output torque, double acting and single acting ( Spring return) 。
2. Shell structure: fixed ball valve body according to user requirements and the actual situation of different design for the structure of casting, forging structure and three forms all welded structure.
3. Unique seat sealing structure: the different ball valve seat seal structure is different, here introduce a simple:
floating ball valve USES the lip liner elastic sealing ring structure design, the reliability of sealing. For low pressure, low pressure or vacuum, are conditions in ball valve, the plate spring loaded valve seat sealing structure, to ensure the long-term and reliable sealing ball valves. Fixed ball valve according to the size of the pressure, choice of dielectric properties and the sealing requirements of ball before sealing structure and sealing structure after or before and after the double seal structure. Medium and high temperature ball valve seat materials can choose para polystyrene or metal materials.
4. Block and drain: when the valve is closed, the upstream and downstream side of the seat that liquid blocking, body lumen of stagnant objects can be discharge by discharging device.
5. Automatic pressure relief structure: the abnormal rise of cavity pressure, lumen medium can rely on itself thrust to push the seat and automatic relief, to ensure the safety valve.
6. Stem reliable seal: seal backwards bottoms structure is used to stem, pour sealing force with medium pressure increases with increasing of the seal, we can ensure that the valve stem and reliable seal, and, when abnormal stem booster, the valve stem will not spit out.
7. Fire prevention structure: according to the need of the actual situation, the ball valve can be designed for fire prevention structure. Ball valve of the refractory design and execution of API607 standard JB/T6899 rules, once a fire and make the soft seal when burning, the fire prevention structure of ball valve can be prevent leakage of medium large, prevent fire further expanded.
8. Anti-static structure: when operating the valve, because the friction between the ball and seat, can produce a cow and accumulation of electrostatic charge on the sphere, to prevent electrostatic spark producing, set on electrostatic device, the valve will accumulate in the sphere of charge is derived.
pneumatic ball valve in the line is mainly used for cutting speed is quick, distribution, and change the flow direction of medium. Pneumatic ball valve is a new type of valve and its structure characteristics are divided into the following points:
1. Pneumatic actuators: the new type of pneumatic actuator, double acting and single acting ( Spring return) With gear and rack driving, safe and reliable; Large diameter valve adopts pneumatic actuator transmission fork type, reasonable structure, large output torque, double acting and single acting ( Spring return) 。
2. Shell structure: fixed ball valve body according to user requirements and the actual situation of different design for the structure of casting, forging structure and three forms all welded structure.
3. Unique seat sealing structure: the different ball valve seat seal structure is different, here introduce a simple:
floating ball valve USES the lip liner elastic sealing ring structure design, the reliability of sealing. For low pressure, low pressure or vacuum, are conditions in ball valve, the plate spring loaded valve seat sealing structure, to ensure the long-term and reliable sealing ball valves. Fixed ball valve according to the size of the pressure, choice of dielectric properties and the sealing requirements of ball before sealing structure and sealing structure after or before and after the double seal structure. Medium and high temperature ball valve seat materials can choose para polystyrene or metal materials.
4. Block and drain: when the valve is closed, the upstream and downstream side of the seat that liquid blocking, body lumen of stagnant objects can be discharge by discharging device.
5. Automatic pressure relief structure: the abnormal rise of cavity pressure, lumen medium can rely on itself thrust to push the seat and automatic relief, to ensure the safety valve.
6. Stem reliable seal: seal backwards bottoms structure is used to stem, pour sealing force with medium pressure increases with increasing of the seal, we can ensure that the valve stem and reliable seal, and, when abnormal stem booster, the valve stem will not spit out.
7. Fire prevention structure: according to the need of the actual situation, the ball valve can be designed for fire prevention structure. Ball valve of the refractory design and execution of API607 standard JB/T6899 rules, once a fire and make the soft seal when burning, the fire prevention structure of ball valve can be prevent leakage of medium large, prevent fire further expanded.
8. Anti-static structure: when operating the valve, because the friction between the ball and seat, can produce a cow and accumulation of electrostatic charge on the sphere, to prevent electrostatic spark producing, set on electrostatic device, the valve will accumulate in the sphere of charge is derived.
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