Spring Return Pneumatic Actuator Introduction
The spring return pneumatic actuator is a versatile device designed to control valves using the rotational movement of the gear shaft. Similar to the rack and pinion actuator, it employs the meshing motion of the rack and gear, driven by the piston's force.
This actuator offers an array of remarkable features that enhance its functionality and usability. Like its counterpart, it has achieved a CE certificate, underscoring its adherence to stringent quality and safety standards. Moreover, it complies with international standards, including NAMUR, ISO5211, and DIN, ensuring seamless integration and compatibility with a wide range of valve systems.
Featuring an integrated design, the spring return pneumatic actuator prioritizes stability and superior construction. Its well-engineered structure guarantees reliable and consistent performance, even in challenging operational conditions. With a dual piston rack and pinion design, this actuator delivers exceptional output power, enabling precise and efficient valve control. The dual piston mechanism empowers the actuator to generate substantial force, ensuring optimal valve functionality.
In addition to the shared features with the rack and pinion actuator, the spring return pneumatic actuator possesses several distinct characteristics. It operates through single-acting switching actions, driven solely by the air supply, with the closing action achieved through spring return. This single-acting functionality provides options for both normally open and normally closed configurations, enabling precise control over gas flow.
The structure of the spring return pneumatic actuator is simple, with only one air intake (exhaust) at a single end. This simplicity translates into minimal air consumption, contributing to cost efficiency and energy savings. Resetting the actuator is accomplished either through spring force or diaphragm force. A portion of the compressed air energy is utilized to overcome the spring tension or diaphragm resistance, resulting in a reduction of the piston rod's output force.
The cylinder of this actuator houses springs, diaphragms, and other crucial components, resulting in a generally short stroke length. In comparison to double-acting pneumatic actuators of the same size, the effective stroke of the spring return actuator is relatively smaller. Additionally, the tension of the cylinder return spring and the diaphragm varies with deformation, consequently influencing the output force of the piston rod during travel.
Product | Spring Return Pneumatic Actuator |
Structure | Rack and Pinion Rotary Actuator |
Rotary Angle | 0-90 Degree |
Air Supply Pressure | 2.5-8 Bar |
Actuator Body Material | Aluminum Alloy |
Surface Treatment | Hard Anode Oxidation |
Operating Temperature | Standard Temperature:-20℃ ~ 80℃Low Temperature:-15℃ ~ 150℃
High Temperature:-35℃ ~ 80℃ |
Connection Standard | Air interface: NAMURMounting Hole: ISO5211 & DIN3337(F03-F25) |
Application | Ball Valve, Butterfly Valve & Rotary Machines |
Cover Color | Blue,Black,Orange,Red & Customized Colors as Customer needs |
Components & Materials of Pneumatic Actuator
Part
Number |
Each
Number |
Part Name | Standard Materials | Selected Materials |
01 | 1 | Left Cover | Aluminum
Die Casting |
Stainless Steel |
02 | 1 | Right Cover | Aluminum
Die Casting |
Stainless Steel |
03 | 1 | Body | Aluminum
extrusion |
Stainless Steel |
04 | 2 | Piston | Aluminum
Die Casting |
---- |
05 | 1 | Output Shaft | Carbon Steel | Stainless Steel |
06 | 1 | Cam adjustment | Stainless Steel | ---- |
07 | 2 | O-ring(Cover) | NBR | Fluorine or Silicone Rubber |
08 | 2 | O-ring(Piston) | NBR | Fluorine or Silicone Rubber |
09 | 1 | O-ring(output shaft bottom) | NBR | Fluorine or Silicone Rubber |
10 | 1 | O-ring(output shaft at the top) | NBR | Fluorine or Silicone Rubber |
11 | 2 | O-ring(adjusting screw) | NBR | Fluorine or Silicone Rubber |
12 | 2 | Plug(Cylinder) | NBR | Fluorine or Silicone Rubber |
13 | 2 | Bearing(Piston) | POM | ---- |
14 | 1 | Bearing(output shaft at the top) | POM | ---- |
15 | 1 | Bearing(output shaft bottom) | POM | ---- |
16 | 1 | Guide with Bearing(Piston Back) | POM | ---- |
17 | 2 | Thrust bearings(output shaft) | POM | ---- |
18 | 2 | Gasket(output shaft) | Stainless Steel | ---- |
19 | 1 | Flexible file ring | Stainless Steel | ---- |
20 | 8 | Cover bolt | Stainless Steel | ---- |
21 | 8 | Cover Gasket | Stainless Steel | ---- |
22 | 2 | Gasket | Stainless Steel | ---- |
23 | 2 | Nut | Stainless Steel | ---- |
24 | 2 | Adjustment bolt | Stainless Steel | ---- |
25 | 5-16 | Spring Components | Alloy Spring Steel | ---- |
26 | 1 | Position indicator | POM | ---- |
27 | 1 | Screw of Indicator | POM | ---- |
AT - 160 S - K10 F10/12 P27 - 90 - B - A |
A ---Corrosion Resistance Grade: A, B |
B ---Ambient Temp.: Standard-B, Low Temp.: D, High Temp.: G | |
90 ---Rotation Angle: 00~900, 00~1200, 00~1800, 3 Position, 00~450~900 | |
P27 ---Shaft Size Code: P-Star Square, H-Parallel Opposite Hole, W Two Key Hole | |
F10/12 ---Connection: ISO 5211, Flange Size: F03-F25 | |
K10 ---Spring QTY: K5-K16, Not Available for Double Acting | |
S ---Type: D-Double Acting, S-Spring Return | |
160 ---Cylinder Size:32-400 | |
AT --- AT Series Pneumatic Actuator |
AT Series Double Acting Rack and Pinion Pneumatic Actuator Torque(N.m.)
ModelAir Pressure | Air Supply Pressure(Unit: Bar) | ||||||||
3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 7 | 8 | |
AT-40D | 5.7 | 6.7 | 7.6 | 8.6 | 9.5 | 10.5 | 11.4 | 13.3 | 15.2 |
AT-52D | 12.0 | 14.0 | 16.0 | 18.0 | 20.0 | 22.0 | 24.0 | 28.0 | 32.0 |
AT-63D | 21.0 | 24.5 | 28.0 | 31.5 | 35.0 | 38.5 | 42.0 | 49.0 | 56.0 |
AT-75D | 30.0 | 35.0 | 40.0 | 45.0 | 50.0 | 55.0 | 60.0 | 70.0 | 80.0 |
AT-83D | 45.7 | 53.3 | 61.0 | 68.6 | 76.2 | 83.8 | 91.4 | 106.7 | 121.9 |
AT-92D | 67.4 | 78.7 | 89.9 | 101.2 | 112.4 | 123.6 | 134.9 | 157.4 | 179.8 |
AT-105D | 97.6 | 113.9 | 130.2 | 146.4 | 162.7 | 179.0 | 195.2 | 227.8 | 260.3 |
AT-125D | 152.2 | 177.6 | 203.0 | 228.3 | 253.7 | 279.1 | 304.4 | 355.2 | 405.9 |
AT-140D | 260.3 | 303.7 | 347.0 | 390.4 | 433.8 | 477.2 | 520.6 | 607.3 | 694.1 |
AT-160D | 396.6 | 462.7 | 528.8 | 594.9 | 661.0 | 727.1 | 793.2 | 925.4 | 1057.6 |
AT-190D | 639.3 | 745.9 | 852.4 | 959.0 | 1065.5 | 1172.1 | 1278.6 | 1491.7 | 1704.8 |
AT-210D | 781.0 | 911.2 | 1041.4 | 1171.5 | 1301.7 | 1431.9 | 1562.0 | 1822.4 | 2082.7 |
AT-240D | 1147.6 | 1338.8 | 1530.1 | 1721.3 | 1912.6 | 2103.9 | 2295.1 | 2677.6 | 3060.2 |
AT-270D | 1742.9 | 2033.4 | 2323.8 | 2614.3 | 2904.8 | 3195.3 | 3485.8 | 4066.7 | 4647.7 |
AT-300D | 2390.8 | 2789.3 | 3187.8 | 3586.2 | 3984.7 | 4383.2 | 4781.6 | 5578.6 | 6375.5 |
AT-350D | 3580 | 4176 | 4773 | 5369 | 5966 | 6563 | 7159 | 8352 | 9546 |
AT-400D | 5100 | 5950 | 6800 | 7650 | 8500 | 9350 | 10200 | 11900 | 13600 |
AT Series Spring Return (Single Acting )Rack and Pinion Pneumatic Actuator Torque(N.m.)
Air Pressure | Spring Torque | spring Torque | |||||||||||||||||||||
Model | Spring Q.ty | 2.5bar | 3.0bar | 3.5bar | 4.0bar | 4.5bar | 5.0bar | 5.5bar | 6.0bar | 7.0bar | 8.0bar | ||||||||||||
00 | 900 | 00 | 900 | 00 | 900 | 00 | 900 | 00 | 900 | 00 | 900 | 00 | 900 | 00 | 900 | 00 | 900 | 00 | 900 | 900 | 00 | ||
AT-52S | 5 6 7 8 9 10 11 12 |
5.7 5.0 |
3.8 2.6 |
7.7 7.0 6.1 |
5.8 4.6 3.4 |
9.7 9.0 8.1 7.3 |
7.8 6.6 5.4 4.1 |
11.7 11.0 10.1 9.3 8.4 |
9.8 8.6 7.4 6.1 4.9 |
13.7 13.0 12.1 11.3 10.4 9.5 |
11.8 10.6 9.4 8.1 6.9 5.6 |
15.7 15.0 14.1 13.3 12.4 11.5 10.7 |
13.8 12.6 11.4 10.1 8.9 7.6 6.4 |
17 16.1 15.3 14.4 13.5 12.7 11.8 |
14.6 13.4 12.1 10.9 9.6 8.4 7.2 |
18.1 17.3 16.4 15.5 14.7 13.8 |
13.4 12.1 10.9 9.6 8.4 7.2 |
21.3 20.4 19.5 18.7 17.8 |
18.1 16.9 15.6 14.4 13.2 |
24.4 23.5 22.7 21.8 |
20.9 19.6 18.4 17.2 |
6.2 7.4 8.6 9.9 11.1 12.4 13.6 14.8 |
4.3 5 5.9 6.7 7.6 8.5 9.3 10.2 |
AT-63S | 5 6 7 8 9 10 11 12 |
10.7 9.3 |
7.1 5 |
14.2 12.8 11.4 |
10.6 8.5 6.4 |
17.7 16.3 14.9 13.6 |
14.1 12 9.9 7.8 |
21.2 19.8 18.4 17.1 15.7 |
17.6 15.5 13.4 11.3 9.2 |
24.7 23.3 21.9 20.6 19.2 17.8 |
21.1 19 16.9 14.8 12.7 10.6 |
28.2 26.8 25.4 24.1 22.7 21.3 20 |
24.6 22.5 20.4 18.3 16.2 14.1 12.1 |
30.3 28.9 27.6 26.2 24.8 23.5 22.1 |
26 23.9 21.8 19.7 17.6 15.6 13.5 |
32.4 31.1 29.7 28.3 27 25.6 |
23.9 21.8 19.7 17.6 15.6 13.5 |
38.1 36.7 35.3 34 32.6 |
32.3 30.2 28.1 26.1 24 |
43.7 42.3 41 39.6 |
37.2 35.1 33.1 31 |
10.4 12.5 14.6 16.7 18.8 20.9 22.9 25 |
6.8 8.2 9.6 10.9 12.3 13.7 15 16.4 |
AT-75S | 5 6 7 8 9 10 11 12 |
14.5 12.3 |
10.5 7.6 |
19.5 17.3 15.2 |
15.5 12.6 9.7 |
24.5 22.3 20.2 18.1 |
20.5 17.6 14.7 11.8 |
29.5 27.3 25.2 23.1 21 |
25.5 22.6 19.7 16.8 13.9 |
34.5 32.3 30.2 28.1 26 23.9 |
30.5 27.6 24.7 21.8 18.9 16 |
39.5 37.3 35.2 33.1 31 28.9 26.8 |
35.5 32.6 29.7 26.8 23.9 21 18.1 |
42.3 40.2 38.1 36 33.9 31.8 29.7 |
37.6 34.7 31.8 28.9 26 23.1 20.3 |
45.2 43.1 41 38.9 36.8 34.7 |
34.7 31.8 28.9 26 23.1 20.3 |
53.1 51 48.9 46.8 44.7 |
46.8 43.9 41 38.1 35.3 |
61 58.9 56.8 54.7 |
53.9 51 48.1 45.3 |
14.5 17.4 20.3 23.2 26.1 29 31.9 34.7 |
10.5 12.7 14.8 16.9 19 21.1 23.2 25.3 |
AT-83S | 5 6 7 8 9 10 11 12 |
22.2 19 |
15 10.4 |
29.9 26.7 23.6 |
22.7 18.1 13.5 |
37.5 34.3 31.2 28 |
30.3 25.7 21.1 16.5 |
45.2 42 38.9 35.7 32.5 |
38 33.4 28.8 24.2 19.6 |
52.8 49.6 46.5 43.3 40.1 37 |
45.6 41 36.4 31.8 27.2 22.6 |
60.4 57.2 54.1 50.9 47.7 44.6 41.4 |
53.2 48.6 44 39.4 34.8 30.2 25.6 |
64.8 61.7 58.5 55.3 52.2 49 45.8 |
56.2 51.6 47 42.4 37.8 33.2 28.6 |
69.3 66.1 62.9 59.8 56.6 53.4 |
51.6 47 42.4 37.8 33.2 28.6 |
81.4 78.2 75.1 71.9 68.7 |
69.9 65.3 60.7 56.1 51.5 |
93.4 90.4 87.1 83.9 |
80.5 75.9 71.3 66.7 |
23 27.6 32.2 36.8 41.4 46 50.6 55.2 |
15.8 19 22.1 25.3 28.5 31.6 34.8 38 |
AT-92S |
5 |
32.8 |
21.7 |
44.1 |
33 |
55.4 |
44.3 |
66.6 |
55.5 |
77.9 |
66.8 |
89.1 |
78 |
95.6 |
82.4 |
102.2 |
75.5 |
120.1 115.4 110.7 106 101.4 |
102.4 95.5 88.7 81.8 74.9 |
137.8 133.1 128.4 123.8 |
117.9 111.1 104.2 97.3 |
34.4 |
23.3 |
AT-105S |
5 |
49.7 |
32.1 |
66 |
48.4 |
82.3 |
64.7 |
98.6 |
81 |
114.8 |
97.2 |
131.1 |
113.5 |
141 |
119.9 |
150.9 |
110.1 |
177.2 170.9 164.5 158.2 151.9 |
149.1 139.2 129.4 119.8 109.8 |
203.4 197 190.7 184.4 |
171.7 161.9 152.3 142.3 |
49.2 |
31.6 |
AT-125S |
5 |
74.8 |
47.8 |
100.2 |
73.2 |
125.6 |
98.6 |
151 |
124 |
176.3 |
149.3 |
201.7 |
174.7 |
216.1 |
185.1 |
231.4 |
169.1 |
271.2 261.2 250.2 240.2 230.2 |
230.2 214.2 198.2 182.2 167.2 |
311.9 300.9 290.9 280.9 |
264.9 248.9 232.9 217.9 |
79 |
52 |
AT-140S |
5 |
130.9 |
87.9 |
174.3 |
131.3 |
217.7 |
174.7 |
261 |
218 |
304.4 |
261.4 |
347.8 |
304.8 |
374.2 |
322.2 |
400.6 |
296.2 |
470.3 452.3 435.3 418.3 401.3 |
401.3 375.3 349.3 323.3 297.3 |
539.1 522.1 505.1 488.1 |
462.1 436.1 410.1 384.1 |
129 |
86 |
AT-160S |
5 |
190.5 |
122.5 |
256.6 |
188.6 |
322.7 |
254.7 |
388.8 |
320.8 |
454.9 |
386.9 |
521 |
453 |
559.1 |
477.1 |
597.2 |
435.1 |
702.4 674.4 646.4 618.4 590.4 |
592.4 550.4 508.4 467.4 425.4 |
806.6 778.6 750.6 722.6 |
682.6 640.6 599.6 557.6 |
208 |
140 |
AT-190S |
5 |
333 |
224 |
440 |
331 |
546 |
437 |
653 |
544 |
759 |
650 |
866 |
757 |
933 |
802 |
999 |
740 |
1172 1132 1092 1052 1012 |
997 935 874 812 750 |
1346 1306 1266 1226 |
1149 1088 1026 964 |
309 |
200 |
AT-210S |
5 |
376 |
271 |
506 |
401 |
636 |
531 |
767 |
662 |
897 |
792 |
1027 |
922 |
1102 |
976 |
1177 |
900 |
1383 1328 1273 1218 1163 |
1215 1139 1063 987 911 |
1588 1533 1478 1423 |
1399 1323 1247 1171 |
380 |
275 |
AT-240S |
5 |
547 |
403 |
738 |
594 |
929 |
785 |
1120 |
976 |
1312 |
1168 |
1503 |
1359 |
1612 |
1439 |
1721 |
1329 |
2022 1939 1857 1775 1693 |
1792 1680 1570 1459 1348 |
2322 2240 2158 2076 |
2063 1953 1842 1731 |
554 |
410 |
AT-270S |
5 |
892 |
665 |
1183 |
956 |
1473 |
1246 |
1764 |
1537 |
2054 |
1827 |
2345 |
2118 |
2523 |
2252 |
2703 |
2094 |
3172 3060 2948 2836 2725 |
2809 2651 2495 2337 2180 |
3641 3529 3417 3306 |
3232 3076 2918 2761 |
787 |
560 |
AT-300S |
5 |
1263 |
932 |
1661 |
1330 |
2060 |
1729 |
2458 |
2127 |
2857 |
2526 |
3255 |
2924 |
3508 |
3111 |
3760 |
2899 |
4411 4265 4119 3973 3827 |
3882 3670 3457 3245 3033 |
5062 4916 4770 4624 |
4467 4254 4042 3830 |
1061 |
730 |
Pneumatic Actuator FAQ:
Q1: Pneumatic Valve can’t Move ?
A1: Check the Solenoid Valve is normal or not;
Test the actuator separately with air supply;
Check the handle position.
Q2: Pneumatic Actuator with slow motion ?
A2: Check air supply is enough or not;
Test the Actuator Torque is ok or not for the valve;
Check Valve coil or other components are too tight or not;
Q3: Reply Devices without Signal ?
A3: Inspect and repair power circuit;
Adjust the cam to correct position;
Replace micro switches.