New electric pneumatic - valve actuators embedded servo function

New electric pneumatic - valve actuators embedded servo function, 4 - accept reunification Ma or 1-20 5 v DC standard signal, convert current signal to the corresponding linear displacement, automatically control the pneumatic - valve opening, to achieve the fluid inside the pipeline pressure, flow, temperature, liquid level and other process parameters of continuous adjustment. Pneumatic control valve pneumatic piston actuators using compressed air as power source, through the movement of the piston driven 90 - degree rotating crank arm, to make the automatic opening and closing of the valve. Part of it is: the adjusting bolt, actuator housing, crank arm shaft, piston, connecting rod, cylinder block, cylinder, cardan shaft.