he springs forces the pistons inwards. The pinion turns clockwise while air is being exhausted from port A.Spring return pneumatic actuator's operating condition1, medium : Dry or lubricated air, or the non-corrosive gas2, air supply pressure: the minimum supply pressure is 2.5 Barthe maximum supply pressure is 8 Bar3, travel adjustment : have adjustment range of ±5° for the rotation at 0°and 90°Main technical data for ball valves1, BALL VALVE MATERIALbody material : WCB, LCB, A105, CF8,CF8M