The valve torque calculation concrete is: 1/2 valve diameter square x 3.14 that is the area of the valve plate, and then multiplied by the support pressure (namely the valve working pressure) draw shaft are under static pressure, multiplied by the coefficient of friction (to look-up table general steel friction coefficient take 0.1, steel for rubber friction coefficient take 0.15), multiplied by the diameter of axle divided by 1000 eligible valve torque number, the unit is bull · meters, electric device and pneumatic actuators greater reference take valve torque 1.5 times.

keywords: pneumatic actuators, valves