How to use double-acting pneumatic actuators

When using a double-acting actuator mechanism, first determine the torque of the valve, and increase the safety value of water vapor or non-lubricating medium by 25%; increase the safety value of non-lubricating dry gas medium by 60%; increase the safety value of granular powder medium transported by non-lubricating gas 100%; for clean and frictionless lubricating medium, add 20% of the safety value to the safety value, and then refer to the torque table according to the working pressure of the air source to obtain an accurate actuator model. For example, choose a double-acting gas turbine: the air supply pressure is only 5bar, and the ball valve requires a torque of 20On. M is controlled, and the medium is non-lubricating water vapor. Considering the safety factor, an increase of 25% equals 250N. M first find the air supply pressure of 5bar according to the table, then vertically find the air supply pressure equal to or along the column For similar torque data, choose 272n. Follow the line to find the model on the left and select GT130. Choose single acting (spring return), for example: supply air pressure is only 4bar, butterfly valve needs 100N torque. M is the controlled medium, and the medium is non-lubricated dry gas. Taking into account the safety factor, an increase of 60% equals 160n. M First, find the end point of the whistle reset according to the table to get similar torque at 166n. Then follow the straight line on the left to find the end torque of 4bar, 196N. The air supply pressure torque should be greater than the spring return torque. When the pressure torque of the air source is greater than the return torque of the spring, search for its model along the left side of this line, select the gt160s model, and have 10 ammunition reserves.