Introduction to AW25 Pneumatic Actuator
AW25 pneumatic actuator is divided into double action type and single action type (spring return), two split type cylinders, which are easy to manufacture large-sized cylinder block. Meet the needs of various large rotary valves
Detailed description of AW25 pneumatic actuator:
AW series pneumatic actuators are divided into dual function and single function (spring return), with large output torque and flexible and balanced action; The piston rod is hard chrome with good wear resistance; All sliding parts are equipped with oil-free lubrication shafts and guide rings to reduce the friction coefficient and prolong the service life. The U-curve output torque of AW pneumatic actuator is more suitable for opening and closing adjustment of angle travel valves such as large diameter balls and butterfly valves, and can also be used in other rotary motion occasions. It is an ideal device to achieve automatic control of industrial pipelines.
AW selects double acting pneumatic actuator model:
When using double acting actuators, first determine the torque of the valve. Under normal conditions, the * safety factor is 15~20%. Then increase the safety value according to the fluid medium used by the valve. The safety value of lubricating medium increases by 20%; The safety value of water vapor or non lubricating liquid medium increases by 25%; The safety value of non lubricating slurry medium is increased by 40%; The safety value of non lubricated dry gas medium is increased by 60%; The safety value of non lubricated particulate media is increased by 80%. The particle powder medium transported by non lubricating gas increases the safety value; Find the torque table AW pneumatic actuator model of double acting actuator according to the calculated torque value and air supply pressure.
AWS pneumatic actuator single function (spring return) model selection:
Using the single function actuator, find the single function torque table according to the torque value and air supply pressure calculated above, first find the end point of spring return, and then check the end point of air supply working pressure. The air supply pressure torque should be greater than the spring return torque to obtain the accuracy AWS model. Note: In the single pneumatic control output torque table of AWS, the spring return "end point" torque is the torque to close the valve, and the spring return "start" torque is the torque to open the valve. The corresponding torque at the beginning of the air supply pressure is the torque at the closing of the valve, and the torque at the end of the air supply pressure is the torque at the opening of the valve.
Structural features of AW25 pneumatic actuator
1) It is divided into double acting and single acting (spring return), two split cylinders, which are easy to manufacture large-sized cylinders. Meet the requirements of various large rotary valves.
2) The output torque is large, the action is flexible and stable, the inner wall of the cylinder and the piston shaft are plated with hard chromium, and the wear resistance is good. All sliding parts are equipped with oil-free lubrication shafts and guide rings to reduce friction coefficient and prolong service life. AW large diameter ball valves and butterfly valves are more suitable for U-shaped curve output torque of pneumatic actuators.
3) Rotary angle: double acting=90 °, single acting=90 ° Adjustable angle from both ends ± 5 °
4) , normal temperature type, high temperature type, low temperature type. Working environment temperature: - 20 °~90 ℃. High temperature type: - 20 °～ 180 ℃, low temperature type: - 40 °～ 90 ℃ Nitrile rubber is used, and fluororubber or silicone rubber is used at high or low temperature
5) Air source: clean air filtration, drying or lubricating oil, zui atmospheric pressure 0.4MPa, zui atmospheric pressure 1.0MPa.
6) Basic design: pneumatic double cylinder double piston rack and pinion transmission mechanism. Model AW=double action; Type AWS=single action (spring return).
8) Accessory function: it can be equipped with single (double) electric control solenoid valve, limit switch annunciator, electric positioner, air source processing triplet and manual operating mechanism to fully realize automatic or manual control.
