Pneumatic valve actuator is an executive device that uses air pressure to drive ball valve, butterfly or regulating valve. The pneumatic actuator is easy to repair and maintain, and has good adaptability to the environment.

Specifiation

• Model: RDDLZ-AT088D
• Bore Size: 88mm (3.46 inch)
• Air Supply Port: 1/4 inch
• Power Source: Compressed Air
• Actuator Type: Double Acting
• Air Pressure: 2.5bar ~ 8bar
• Max Working Pressure: 10bar
• Operating Temperature (Optional): -20℃ ~ 80℃, -35℃ ~ 80℃, -20℃ ~ 150℃
• Rotation Angle: 90°±5%
• Body Material: Aluminum Alloy
• Life Time: One Million Time

Dimensions

RDDLZ-AT088D

Details

Tips: Difference between double acting and spring return pneumatic valve actuator

• Double acting pneumatic valve actuator
  The output torque of the double acting pneumatic valve actuator is obtained by multiplying the piston pressure (supplied by the air source pressure) by the pitch circle radius (force arm). And the friction resistance is small and the efficiency is high. , the output torque is linear both clockwise and counterclockwise. Under normal operating conditions, the recommended safety factor for double-acting actuators is 25-50%
• Spring return pneumatic valve actuator
  The output torque of the single acting pneumatic valve actuator is obtained in two different operation processes, and each operation generates two different torque values ​​according to the stroke position. The output torque of the spring return actuator is obtained by multiplying the force (air pressure or spring force) by the force arm. In this case, the pressure of the air source forces the piston to turn from 0 to 90 degrees. Due to the reaction force generated by the compression of the spring, the torque gradually decreases from the maximum value at the starting point until it reaches the second condition: the output torque is that the spring recovers when the middle cavity loses air. The force acting on the piston is called "spring stroke output torque". In this case, due to the elongation of the spring, the output torque gradually decreases from 90 degrees to 0 degrees. As mentioned above, it is designed on the basis of generating a balance moment under such conditions. In each case, by changing the relationship between the number of springs per side and the air supply pressure (eg. 2 springs per side and 5.5 bar air supply or vice versa) it is possible to obtain an unbalanced moment. In spring return applications two conditions can be obtained: Air loss on or air loss off. Under normal operating conditions, the recommended safety factor for spring return actuators is 25-50%.