Pneumatic valve actuator troubleshooting will choose a more suitable pneumatic actuator, a more cost-effective pneumatic actuator, then first of all, we must understand the types of actuators, the actuators can be divided into pneumatic actuators and electric actuators, the more commonly used ones. There are two kinds of actuators, and we will choose pneumatic actuators when we buy.
We need to choose the actuator according to the size of the air source and the pneumatic ball valve price, the torque required to turn the valve, the size will not turn, and the valve life will not be long if it is too large. Generally a 30% margin for torque is fine. Pneumatic actuators can be seen from the text that this type of actuator is operated by air pressure. Compared with electric actuators, it can adapt to more environments, and its reasonable structure makes its load capacity larger, achieving the goal of high torque output. At the same time, compared with electric actuators, the action is faster and the response is faster. Of course, electric actuators also have many advantages that pneumatic actuators cannot match. The advantages of pneumatic actuators are also not available in current electric actuators. Both have their own shortcomings and advantages. Therefore, under the continuous development of technology in the future, the cost performance of the two will be greatly improved.
Secondly, we evaluate the installed platform. When selecting an actuator for each environment, there is a standard for the actuator. It is not wrong to find the corresponding standard according to the valve. As a pneumatic actuator, its function in the valve is to make the valve device more convenient to use. Due to the access of the pneumatic valve actuator, the valve can drive the rapid linkage of the valve body parts when it operates in the pipeline, which has a certain automation effect. The drive of the valve body opening and closing parts also has certain value. This kind of valve is used to open and close the fluid pipeline due to its low fluid resistance.
(1) External vibration source, that is, the equipment pipeline itself has vibration.
(2) The selection of the control valve of the pneumatic valve actuator does not meet the requirements of the selection, such as unsuitable flow characteristics, large valve diameter, poor spring stiffness, etc., which cause the control valve to vibrate.
(3) Vibration caused by fluid erosion.
If it is found that the equipment pipeline itself has vibration, the equipment pipeline can be cleaned and readjusted to make the vibration disappear. If it is the problem of the pneumatic actuator control valve itself, the restricting orifice can be used to absorb part of the pressure drop, reduce the throttling speed, and overcome the valve vibration, and the restricting orifice can also change the natural frequency of the system to avoid the natural frequency of the control valve and the Vibration occurs when the natural frequencies of the system are close to each other.
As the opening and closing device, the pneumatic actuator installed in this valve has the ability to use compressed gas to push the piston to make the valve stem connected to the inside of the valve function, and drive the ball valve ball to move, thus regulating the fluid medium in the pipeline. effect. As the opening and closing part, the ball rotates around the axis of the ball valve, which has a certain effect on the transportation of the medium. From professional china valve factory, ball valves are characterized by wear resistance and good sealing performance. And because the resistance is small, the internal valve body suffers less wear and the service life is relatively long, which makes the use of this pneumatic valve smoother in the pipeline.