The pneumatic actuator is the actuator of the pneumatic valve, which determines the execution efficiency of the pneumatic valve. In the use of the process, the pneumatic actuator should be protected so that you can avoid some causes of damage to the pneumatic actuator. Load is an important cause of damage to the pneumatic actuator. There are several kinds of the main performance of load.

  1. The torque limiting mechanism is not set to the right value. The stopped torque is less than its set value, thus causing continuous generation of excessive torque, which let the motor stops rotating.
  2. The voltage of the power supply is too low so it cannot obtain the required torque, causing the motor to stop rotating.
  3. The continuous use of a pneumatic actuator. The heat accumulation generated exceeds the allowable temperature rise of the motor.
  4. The ambient temperature is high, relatively making the pneumatic actuator heat capacity drop.
  5. Due to some reasons, the torque limiting actuator circuit malfunctions, resulting in excessive torque.

The protection measures for pneumatic actuators in case of load are mainly as follows:

  1. By using the thermostat to protect the pneumatic actuator’s continuous operation or electric operation of the overload.
  2. The use of fuses or overcurrent relays can effectively avoid short-circuit accidents.
  3. Through the use of overcurrent relay to protect the motor blocking.
  4. In the process of use, the pneumatic actuator needs to be maintained and protected. Only to understand the causes of load generation of pneumatic actuators, and master the protection measures, you can better protect the pneumatic actuator and extend its service life.