Manufacturers of pneumatic actuator with top mounted handwheel
Pneumatic actuator plays a very important role in the field of industrial production. Pneumatic actuators are mostly operated in harsh environments, such as high temperature, high pressure, strong corrosion and other environments.
This makes the probability of pneumatic actuator failure still has a certain increase. The valve body does not act, the valve cannot be closed to zero, the pneumatic actuator has no feedback signal, and the signal pressure is unstable.
Some special faults such as vibration of pneumatic actuator control valve. Next, we mainly analyze the causes and treatment measures of the vibration of the control valve with special faults.
The vibration of the control valve of the pneumatic actuator will cause the control system to fail to work normally. The main causes of vibration are as follows:
1. External vibration source, that is, the equipment pipe itself has vibration.
2. The selection of the control valve of the pneumatic actuator does not meet the selection requirements, for example, the flow characteristics are inappropriate, the valve diameter is too large, and the spring stiffness is poor, resulting in the vibration of the control valve.
3. It is eroded by the fluid to produce vibration.
Treatment measures: If the equipment pipe itself is found to have vibration, it can be cleaned and adjusted to make the vibration disappear.
If the control valve of the pneumatic actuator has problems, the flow limiting orifice can be used to absorb part of the pressure drop, reduce the throttling speed and overcome the valve vibration. In addition, the flow limiting orifice can also change the natural frequency of the system to avoid vibration caused by the natural frequency of the control valve approaching the natural frequency of the system.
