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Pneumatic valve actuator fault solution will choose the more suitable pneumatic actuator, cost-effective pneumatic actuator, then we must first understand the type of actuator, the actuator can be divided into pneumatic actuator and electric actuator, the more commonly used actuator is these two kinds of actuators, we will choose pneumatic actuator when purchasing.

Then we have to choose the actuator according to the size of the air source, the torque required to turn the valve, the size of the turn does not understand, too large valve life is not long. It is generally OK to leave a margin of 30% for torque. The pneumatic actuator can be seen from the text that this type of execution device is operated by gas pressure. Compared with the electric actuator, it can adapt to more environments, and the reasonable structure makes its load greater, achieving the goal of high torque output. At the same time, the action is fast and the reaction is faster than the electric actuator. Of course, the electric actuator also has many advantages that the pneumatic actuator can not compare, the advantages of the pneumatic actuator is also the current electric actuator does not have, both have their own shortcomings and advantages. Therefore, under the continuous development of science and technology in the future, the cost performance of both will be greatly improved.

Secondly, we assess the installed platform, each environment chooses the actuator, there is a standard for the actuator, we have to find the corresponding standard according to the valve will not be wrong. As a pneumatic actuator, in fact, its role in the valve is to make the valve device more convenient when used. Due to the access of the pneumatic actuator, this valve can drive the rapid linkage of the valve body parts when operating in the pipeline, which has a certain automatic effect, and because the actuator itself is energy driven, it is also valuable for the valve body opening and closing parts of the valve body. This valve is used to open and close the fluid pipeline because of the low fluid resistance.

Common faults include valve body does not act, valve can not be closed to zero, pneumatic actuator no feedback signal, signal pressure instability. There are also some more specific failures, such as pneumatic actuator control valve vibration. Next, we mainly analyze the causes of special fault control valve vibration and treatment measures.

Pneumatic valve actuator fault resolved

The vibration of the pneumatic actuator control valve will cause the control system to fail to work normally, and there are mainly three reasons for the vibration:

1, external vibration source, that is, the equipment pipeline itself has vibration.

2, the selection of the pneumatic actuator control valve does not meet the requirements of the selection, such as the flow characteristics are not suitable, the valve diameter is too large, the spring stiffness is poor, and so on, resulting in the vibration of the control valve.

3, by fluid erosion resulting in vibration.

Troubleshooting measures for pneumatic valve actuators: If it is found that there is vibration in the equipment pipeline itself, the equipment pipeline can be cleaned and adjusted to make its vibration disappear. If it is the problem of the pneumatic actuator control valve itself, the flow limiting orifice plate can be used to absorb part of the pressure drop, reduce the throttling speed, and overcome valve vibration, and the flow limiting orifice plate can also change the natural frequency of the system to avoid vibration caused by the natural frequency of the control valve and the natural frequency of the system.

As one of the opening and closing devices, the pneumatic actuator installed in this valve has the use of compressed gas to push the piston so that the valve stem connected with the valve inside plays a role, driving the ball valve ball to move, thus playing a role in regulating the fluid medium of the pipeline. As one of the opening and closing parts, the ball rotates around the axis of the ball valve, which has a certain effect on the transmission of the medium. Ball valve is characterized by wear resistance, sealing performance is better, and because of the small resistance, so the internal valve body is subjected to less wear, the service life is also relatively long, such characteristics make this pneumatic valve in the use of the pipeline more "handy".