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Construction of double acting pneumatic actuator?1,Website:http://www.hugo-valve.com, Actuator Body: ?the extruded aluminum alloy ASTM6005?body can be treated with hard anodized, powder? polyester? painted ( different colors is available such as blue, orange, yellow etc.),PTFE or Nickel plated according to different requirements.2, The twin rack pistons are made form Die-casting aluminum treated with Hard anodized or made form Cast steel? with galvanization. Symmetric mounting position, long cycle life and fast operation, reversing rotation by simply inverting the pistons. 3, Preloaded coating springs are made form the high quality material for resistant to corrosion and longer service life, which can be denounced safely and conveniently to satisfy different requirements of torque by changing quantity of springs4, NBR rubber O-rings provide trouble-free operation at standard temperature ranges.For high and low temperature applications viton or Silicone.Double acting pneumatic actuator& acute;s operating modeThere are two operating modes1, when ball valve closed, Air to Port A forces the pistons outwards, causing the pinion to turn counterclockwise while the air is being exhausted from Port B. When ball valve opened, Air to Port B forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port A 2, when ball valve closed, Air to Port A forces the pistons outwards, causing the pinion to turn clockwise while the air is being exhausted from Port B. Air to Port B forces the pistons inwards, causing the pinion to turn counterclockwise while the air is being exhausted from Port A.Double acting pneumatic actuator& acute;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