Use double action actuator, make sure that the valve torque, in normal use condition, the recommended safe coefficient for 15-20%. Then according to the valve use fluid medium greater increase. For cleaning, lubricating medium greater increased by 20%; Water vapor or non lubrication liquid medium increased by 25% greater;

To the lubrication of the slurry liquid medium increased by 40% greater; The lubrication of the dry gas medium greater increased by 60%; The lubrication of the particle medium greater increased by 80%. The lubrication with gas particles powder medium greater increased by 100%; Based on the calculation of the torque value and use air pressure find double action actuator torque table, can get accurate single action (spring reset) pneumatic operation type number choice: use single acting actuators, according to the calculation of the torque value and use air pressure, find the single-acting torque meter, first check spring reset terminal, then check the air pressure, air pressure end torque should be greater than spring reset torque.

Description: single pneumatic type output torque table, spring reset "terminal" torque which is close the valve torque, spring reset "start" torque which is open the valve torque. The corresponding air pressure start torque is close the valve state torque, air pressure end torque which is open the valve torque.