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Pneumatic Actuators : Ope.

Double Acting Actuator
Double acting are rotated by supplying air to the related port until it reaches desired position.
Counterclockwise rotation (CCWR)
Air to port B forces the pistons inwards, causing the pinion to rotate clockwise while the air is exhausted from port A.
Air to port A forces the pistons outwards, causing the pinion to rotate countercockwise while the air is exhausted from port B.
Clockwise rotation (CWR)
Air to port B forces the pistons inwards, causing the pinion to rotate counterclockwise while the air is exhausted from port A.
Air to port A forces the pistons outwards, causing the pinion to rotate clockwise while the air is exhausted form port B.
doubleeffet
Double acting actuators torque values (Nm)
  Air supply pressure (bar)
Model 2 2,5 3 4 4,5 5 5,5 6 7 8
90DA032 1 2 3 4 5 6 7 9 11 13
90DA040 6 8 10 13 14 16 18 20 22 26
90DA052 8 10 12 16 18 20 22 28 30 34
90DA063 15 19 22 30 33 37 40 44 52 58
90DA075 20 26 30 40 45 50 55 60 70 80
90DA083 33 40 48 63 71 79 86 94 110 125
90DA092 45 57 68 90 102 113 124 136 158 182
90DA0105 66 83 100 132 149 166 182 200 232 265
90DA0125 101 126 151 202 226 252 276 301 352 402
90DA0140 171 214 257 342 385 428 471 513 599 684
90DA0160 266 333 399 532 600 665 732 798 932 1064
90DA0190 426 532 639 852 958 1064 1170 1277 1490 1702
90DA0210 532 665 798 1064 1198 1330 1463 1596 1862 2128
90DA0240 770 962 1155 1540 1732 1924 2117 2309 2693 3078
90DA0270 1169 1462 1755 2340 2632 2925 3217 3510 4095 4680
DISCLAIMER : By industry standard, a safety factor of 30% should be considered when sizing actuators with a valve
Spring return Actuators
Spring return pneumatic actuators are rotated on one side by compressed air pressure while the springs are loaded. Rotation to the other side is generated by the spring torque.
Counterclockwise Rotation (CCWR)
Loss of air at port A, frees the energy stored in the springs which forces the pistons inwards and rotates the pinion clockwise.
Applying air to port A forces the pistons outwards, causing the pinion to rotate counterclockwise while the springs are compressed.
Clockwise Rotation (CWR)
Loss of air port A, frees the energy stored in the springs which forces the pistons inwards and rotates the pinion counterclockwise.
Applying air to port A forces the pistons outwards, causing the pinion to rotate clockwise while the springs are compressed.
Positioning of springs for spring return actuator
ressorts