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Spring Return Pneumatic Actuator video

Spring Return Pneumatic Actuator

A. Spring return pneumatic actuators utilize a spring to provide automatic return to the initial position.
B. They are designed with a single air port for actuation in one direction, while the spring ensures the return.
C. These actuators offer fail-safe operation, ensuring the valve or device returns to a safe position during power loss or system failure.

Send Inquiry

Description

A spring return pneumatic actuator converts pneumatic energy into mechanical motion using a compressed spring. It consists of a cylinder with a piston and a spring. When compressed air enters the cylinder, it pushes the piston in one direction, compressing the spring. This action enables the actuator to perform the desired movement. When the air supply is stopped, the compressed spring force causes the piston to retract, returning the actuator to its initial position. Spring return actuators are widely used in applications requiring fail-safe operation to ensure the valve or device returns to a safe position during power loss or system failure. Their reliability and efficiency make them suitable for various industrial processes and systems.

 

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: NAMUR

Mounting 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

 

1

 

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.)

 

Model\Air 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
6
7
8
9
10
11
12

32.8
28.1




 

21.7
14.9




 

44.1
39.4
34.7



 

33
26.2
19.3



 

55.4
50.7
46
41.4


 

44.3
37.5
30.6
23.7


 

66.6
61.9
57.2
52.6
47.9

 

55.5
48.7
41.8
34.9
28

 

77.9
73.2
68.5
63.9
59.2
54.5
 

66.8
60
53.1
46.2
39.3
32.5
 

89.1
84.4
79.7
75.1
70.4
65.7
61

78
71.2
64.3
57.4
50.5
43.7
36.8

95.6
90.9
86.3
81.6
76.9
72.2
67.6

82.4
75.5
68.6
61.7
54.9
48
41.1


102.2
97.6
92.9
88.2
83.5
78.9


75.5
68.6
61.7
54.9
48
41.1



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
41.2
48.1
55
61.9
68.7
75.6
82.5

23.3
28
32.7
37.3
42
46.7
51.4
56

AT-105S

5
6
7
8
9
10
11
12

49.7
43.3




 

32.1
22.2




 

66
59.6
53.3



 

48.4
38.5
28.7



 

82.3
75.9
69.6
63.3


 

64.7
54.8
45
35.2


 

98.6
92.2
85.9
79.6
73.3

 

81
71.1
61.3
51.5
41.6

 

114.8
108.4
102.1
95.8
89.5
83.1
 

97.2
87.3
77.5
67.7
57.8
48
 

131.1
124.7
118.4
112.1
105.8
99.4
93.1

113.5
103.6
93.8
84
74.1
64.3
54.7

141
134.7
128.4
122.1
115.7
109.4
103.1

119.9
110.1
100.3
90.4
80.6
71
61


150.9
144.6
138.3
131.9
125.6
119.3


110.1
100.3
90.4
80.6
71
61



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
59.1
68.9
78.7
88.6
98.4
108
118

31.6
38
44.3
50.6
56.9
63.3
69.3
75.9

AT-125S

5
6
7
8
9
10
11
12

74.8
63.8




 

47.8
32.8




 

100.2
89.2
79.2



 

73.2
58.2
42.2



 

125.6
114.6
104.6
93.6


 

98.6
83.6
67.6
52.6


 

151
140
130
119
109

 

124
109
93
78
62

 

176.3
165.3
155.3
144.3
134.3
123.3
 

149.3
134.3
118.3
103.3
87.3
71.3
 

201.7
190.7
180.7
169.7
159.7
148.7
138.7

174.7
159.7
143.7
128.7
112.7
96.7
80.7

216.1
206.1
195.1
185.1
174.1
164.1
154.1

185.1
169.1
154.1
138.1
122.1
106.1
91.1


231.4
220.4
210.4
199.4
189.4
179.4


169.1
154.1
138.1
122.1
106.1
91.1



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
94
110
125
141
157
173
188

52
63
73
84
94
105
115
125

AT-140S

5
6
7
8
9
10
11
12

130.9
113.9




 

87.9
61.9




 

174.3
157.3
140.3



 

131.3
105.3
79.3



 

217.7
200.7
183.7
166.7


 

174.7
148.7
122.7
97.7


 

261
244
227
210
192

 

218
192
166
141
115

 

304.4
287.4
270.4
253.4
235.4
218.4
 

261.4
235.4
209.4
184.4
158.4
132.4
 

347.8
330.8
313.8
296.8
278.8
261.8
244.8

304.8
278.8
252.8
227.8
201.8
175.8
149.8

374.2
357.2
340.2
322.2
305.2
288.2
271.2

322.2
296.2
271.2
245.2
219.2
193.2
167.2


400.6
383.6
365.6
348.6
331.6
314.6


296.2
271.2
245.2
219.2
193.2
167.2



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
155
181
206
232
258
284
310

86
103
120
137
155
172
189
206

AT-160S

5
6
7
8
9
10
11
12

190.5
162.5




 

122.5
80.5




 

256.6
228.6
200.6



 

188.6
146.6
104.6



 

322.7
294.7
266.7
239.7


 

254.7
212.7
170.7
129.7


 

388.8
360.8
332.8
305.8
277.8

 

320.8
278.8
236.8
195.8
153.8

 

454.9
426.9
398.9
371.9
343.9
315.9
 

386.9
344.9
302.9
261.9
219.9
177.9
 

521
493
465
438
410
382
354

453
411
369
328
286
244
203

559.1
531.1
504.1
476.1
448.1
420.1
392.1

477.1
435.1
394.1
352.1
310.1
269.1
227.1


597.2
570.2
542.2
514.2
486.2
458.2


435.1
394.1
352.1
310.1
269.1
227.1



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
250
292
333
375
417
458
500

140
168
196
223
251
279
307
335

AT-190S

5
6
7
8
9
10
11
12

333
293




 

224
162




 

440
400
360



 

331
269
207



 

546
506
466
426


 

437
375
313
251


 

653
613
573
533
493

 

544
482
420
358
296

 

759
719
679
639
599
559
 

650
588
526
464
402
341
 

866
826
786
746
706
666
626

757
695
633
571
509
4448
386

933
893
853
813
773
733
693

802
740
678
616
555
493
431


999
959
919
879
839
799


740
678
616
555
493
431



1172
1132
1092
1052
1012



997
935
874
812
750




1346
1306
1266
1226




1149
1088
1026
964

309
371
433
495
557
618
680
742

200
240
280
320
360
400
440
480

AT-210S

5
6
7
8
9
10
11
12

376
321




 

271
195




 

506
451
396



 

401
325
249



 

636
581
526
471


 

531
455
379
303


 

767
712
657
602
547

 

662
586
510
434
358

 

897
842
787
732
677
622
 

792
716
640
564
488
412
 

1027
972
917
862
807
752
697

922
546
770
694
618
542
466

1102
1047
992
937
882
827
772

976
900
824
748
672
596
520


1177
1122
1067
1012
957
902


900
824
748
672
596
520



1383
1328
1273
1218
1163



1215
1139
1063
987
911




1588
1533
1478
1423




1399
1323
1247
1171

380
456
532
608
684
760
836
912

275
330
385
440
495
550
605
660

AT-240S

5
6
7
8
9
10
11
12

547
465




 

403
292




 

738
656
573



 

594
483
373



 

929
847
764
683


 

785
674
564
453


 

1120
1038
955
874
791

 

976
865
755
644
532

 

1312
1230
1147
1066
983
901
 

1168
1057
947
836
724
614
 

1503
1421
1338
1257
1174
1092
1010

1359
1248
1138
1027
915
805
694

1612
1529
1448
1365
1283
1201
1119

1439
1329
1218
1106
996
885
774


1721
1640
1557
1475
1393
1311


1329
1218
1106
996
885
774



2022
1939
1857
1775
1693



1792
1680
1570
1459
1348




2322
2240
2158
2076




2063
1953
1842
1731

554
665
775
886
998
1108
1219
1330

410
492
575
565
739
821
903
985

AT-270S

5
6
7
8
9
10
11
12

892
780




 

665
509




 

1183
1071
960



 

956
800
642



 

1473
1361
1250
1138


 

1246
1090
932
775


 

1764
1652
1541
1429
1317

 

1537
1381
1223
1066
908

 

2054
1942
1831
1719
1607
1495
 

1827
1671
1513
1356
1198
1042
 

2345
2233
2122
2010
1898
1786
1674

2118
1962
1804
1647
1489
1333
1175

2523
2412
2300
2188
2076
1964
1853

2252
2094
1937
1779
1623
1465
1308


2703
2591
2479
2367
2255
2144


2094
1937
1779
1623
1465
1308



3172
3060
2948
2836
2725



2809
2651
2495
2337
2180




3641
3529
3417
3306




3232
3076
2918
2761

787
943
1101
1258
1416
1572
1730
1887

560
672
783
895
1007
1119
1231
1342

AT-300S

5
6
7
8
9
10
11
12

1263
1117




 

932
720




 

1661
1515
1369



 

1330
1118
906



 

2060
1914
1768
1622


 

1729
1517
1305
1093


 

2458
2312
2166
2020
1874

 

2127
1915
1703
1491
1279

 

2857
2711
2565
2419
2273
2127
 

2526
2314
2102
1890
1678
1465
 

3255
3109
2963
2817
2671
2525
2379

2924
2712
2500
2280
2076
1863
1651

3508
3362
3216
3070
2924
2778
2632

3111
2899
2687
2475
2262
2050
1838


3760
3614
3468
3322
3176
3030


2899
2687
2475
2262
2050
1838



4411
4265
4119
3973
3827



3882
3670
3457
3245
3033




5062
4916
4770
4624




4467
4254
4042
3830

1061
1273
1485
1697
1909
2122
2334
2546

730
876
1022
1168
1314
1460
1606
1752

 

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.

 

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