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Aluminium spring return pneumatic actuator SR type

  • benefits
  • features
  • dimensions
  • materials
  • diagrams and breakaway torque
  • specifications
  • accessories
  • documents

1.Energized and self-lubricated strips
Less friction between piston and cylinder
It prevents the bonding of the seal to the cylinder even after long periods of inactivity

2.Slots, bushes and pins made by steel with hardness higher than 50 HRC
Higher resistance to the forces inside the actuator

3.Rolling friction between piston and slot
Less friction

4.Scotch yoke with rolling friction (transforming rotary motion into linear motion using piston and shaft without teeths/gears)
Reduced friction between piston and shaft with consequently less wear on the relevant parts
Empowered Breakaway Torque (BTO & BTC)
Smaller volume/size than rack and pinion actuators (with the same torque) therefore less space required for installation
Less weight than the rack and pinion (-30% kg / Nm), with consequent savings on the construction sizing of the plant/equipment
Lower air consumption compared to the rack and pinion actuators (-40% air cm3/Nm for Double Acting and -20% air cm3/Nm for Spring Return) therefore less load on the compressor or the possibility of using a smaller compressor's size.

5.Rolled cylinder

Less wear of the energized ties thanks to the low roughness of the surface (0.15 micron Ra)

From sizes bigger than DAN15, NAMUR interface for solenoid valve is already integrated.
No need for extra plate.

100% in- house manufacturing process technology
Maximum control and accuracy in all the stages of the manufacturing process

ATEX Certificate
Installation is allowed in a potential explosive environment

SIL 3 Certified
Guarantee of the high level of functional safety.

TECHNICAL FEATURES
Torque from 15 Nm to 4000 Nm.
Mounting flange according to EN ISO 5211
F03 - F04 - F05 - F07 - F10 - F12 - F14 - F16 -F25.
In compliance with EN 15714-3
Rotation angle: 92° (-1°, +91°)
Torque: the return torque depends on spring action only notwithstanding the air supply. The spring is provided in four different sizes (see table).
The code numbers after the letters SR, always correspond to the breakaway torque in Nm by 5,6 bar air supply.
The actuator automatic closing takes place in clockwise direction by means of its springs.
ATEX version in conformity with directive 2014/34/EU. Please add YX at the end of the code for ATEX version.

WORKING CONDITION
Temperature: from 0°C to +80°C; from -20°C to +80°C with dry air only. (Special versions: high temperature:-20°C +150°C; low temperature: -50°C +60°)
Air supply: 5,6 bar; maximum 8,4 bar.
Operating media: compressed filtered air, not necessarily lubricated.
In case of lubricated air, either non detergent oil or NBR compatible oil, must be used.

  • SRN15 - SRN960
  • SR1440
  • SR1920
  • SR2880
  • SR4000

Spring return pneumatic actuator sizes from SRN15 (Nm) to SRN960 (Nm)

  DATA SHEET FROM SRN15 (Nm) to SRN53 (Nm)

Code
SRN0015401S
SRN0015402S
SRN0030401S
SRN0030402S
SRN0053401S

Spare seals
KGGI0014
KGGI0016
KGGI0060

Size
SRN15
SRN30
SRN53

ISO
F03/F05
F04
F04
F05/F07
F05/F07

A
233,3
233,3
259
259
304,3

A1 (2,8 Bar)
203,8
203,8
228,5
228,5
270,7

B
11
11
14
14
17

C x depth
M5x8
M5x8
M5x8
M6x9
M6x9

D x depth
M6x9
-
-
M8x12
M8x12

E
36
42
42
50
50

F
50
-
-
70
70

G
10
10
13
13
13

H
30,3
30,3
35,7
35,7
42,8

I
9
9
10
10
12

L
79,2
79,2
90,4
90,4
103,3

M
31,5
31,5
37,7
37,7
44,8

N
47,7
47,7
52,7
52,7
58,5

O
13,2
13,2
16,5
16,5
19,3

P
27,7
27,7
32,7
32,7
38,5

Q
31,5
31,5
37,7
37,7
44,8

R
10,9
10,9
14,5
14,5
16,2

S
20
20
20
20
20

T
59,2
59,2
70,4
70,4
83,3

W (Gas)
1/8"
1/8"
1/8"
1/8"
1/8"

Ch
13
13
13
13
17

Weight (Kg)
1,2
1,2
1,95
1,95
3

Air (dm3/cycle)
0,09
0,09
0,17
0,17
0,3

H = CENTER OF PLATE'S FIXING

  DATA SHEET FROM SRN60 (Nm) al SRN360 (Nm)

Code
SRN0060401S
SRN0090401S
SRN0120401S
SRN0180401S
SRN0240401S
SRN0360401S

Spare seals
KGGI0018
KGGI0019
KGGI0020
KGGI0021
KGGI0022
KGGI0023

Size
SRN60
SRN90
SRN120
SRN180
SRN240
SRN360

ISO
F05/F07
F07/F10
F07/F10
F07/F10
F10/F12
F10/F12

A
338,5
393,7
409,6
474
520,5
613

A1 (2,8 Bar)
309,1
341,8
361,6
406,6
454,1
523

B
17
22
22
22
27
27

C x depth
M6x9
M8x12
M8x12
M8x12
M10x15
M10x15

D x depth
M8x12
M10x15
M10x15
M10x15
M12x18
M12x18

E
50
70
70
70
102
102

F
70
102
102
102
125
125

G
13
16
17
19
19
19,5

H
44,8
54,5
58,1
60
57,4
61,5

I
12
15
15
19
19
22

L
107
137,5
141,1
148
164,9
178

M
46,8
56,5
60,1
62
72,9
78,5

N
60,2
81
81
86
92
99,5

O
19,3
24,8
24,8
24,3
29,5
29,5

P
40,2
51
51
56
62
69,5

Q
46,8
56,5
60,1
62
72,9
78,5

R
18
20,2
22,5
25,5
29
31,8

S
20
30
30
30
30
30

T
87
107,5
111,1
118
134,9
148

W (Gas)
1/8"
1/8"
1/8"
1/8"
1/4"
1/4"

Ch
17
22
22
22
27
27

Weight (Kg)
3,35
5,9
6,8
8,9
11,8
16,5

Air (dm3/cycle)
0,33
0,55
0,8
1
1,5
2

H = CENTER OF PLATE'S FIXING

DATA SHEET FROM SRN480 (Nm) al SRN960 (Nm)

Code
SRN0480401S
SRN0480402S
SRN0720402S
SRN0720401S
SRN0960402S
SRN0960401S

Spare seals
KGGI0024
KGGI0025
KGGI0026

Size
SRN480
SRN720
SRN960

ISO
F10/F12
F14
F12
F14
F12/F16
F14

A
648,2
648,2
798
798
828
828

A1 (2,8 Bar)
563,8
563,8
683
683
714,4
714,4

B
36
36
36
36
46
46

C x depth
M10x15
M16x24
M12x18
M16x24
M12x18
M16x24

D x depth
M12x18
-
-
-
M20x30
-

E
102
140
125
140
125
140

F
125
-
-
-
165
-

G
19,5
19,5
19,5
19,5
18,5
18,5

H
78
78
86,5
86,5
99,2
99,2

I
24
24
27
27
32
32

L
198
198
216
216
237,7
237,7

M
93,5
93,5
101,5
101,5
114,7
114,7

N
104,5
104,5
114,5
114,5
123
123

O
38,5
38,5
38,5
38,5
48,5
48,5

P
74,5
74,5
84,5
84,5
93
93

Q
93,5
93,5
101,5
101,5
114,7
114,7

R
36,5
36,5
41
41
46
46

S
30
30
30
30
30
30

T
168
168
186
186
207,7
207,7

W (Gas)
1/4"
1/4"
1/4"
1/4"
1/4"
1/4"

Ch
27
27
36
36
36
36

Weight (Kg)
22,7
22,7
33
33
42
42

Air (dm3/cycle)
2,8
2,8
4,2
4,2
5,9
5,9

H = CENTER OF PLATE'S FIXING


Spring return pneumatic actuator size SR 1440 (Nm)

DATA SHEET SR 1440 (Nm)
CodeSR1440E16D8A
Weight [Kg]
74,0
Air volume [dm3/cycle]
11,0
Spare sealsKGSI1035

Spring return pneumatic actuator size SR 1920 (Nm)

DATA SHEET SR 1920 (Nm)
CodeSR1920E1608A
Weight [Kg]
67,0
Air volume [dm3/cycle]
12,0
Spare sealsKGDI0030

Spring return pneumatic actuator size SR 2880 (Nm)

DATA SHEET SR 2880 (Nm)
CodeSR2880E16D8A
Weight [Kg]
116,8
Air volume [dm3/cycle]
21,0
Spare sealsKGSI2035

Spring return pneumatic actuator size SR 4000 (Nm)

DATA SHEET SR 4000 (Nm)
CodeSR4000E25D8A
Weight [Kg]
183,0
Air volume [dm3/cycle]
29,1
Spare sealsKGSI1040

  • SRN15 - SRN960
  • SR1440
  • SR1920
  • SR2880
  • SR4000

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SRN15-SRN960

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SRN15-SRN960
Pos
Denomination
Q.ty
Material
1
Cylinder
1
Aluminium alloy
2
Piston
2
Aluminium alloy
3
Cap
2
Aluminium alloy
4
Shaft
1
Stainless steel
5
Scotch yoke
1
Steel alloy
6
Support bush
1
Acetalic resin
7
Shaft support
1
Acetalic resin
8
Bush
2
Steel alloy
9
Rotative sleeve
2
Steel alloy
10*
Dynamic seal
2
Polyurethan
11*
Piston's suport
4
carbo-grafite
12*
O-ring
2
Nitrilic rubber
13
O-ring (upper sealing shaft)
1
FKM
14
External support ring
1
Acetalic resin
15
Ron Washer
1
Stainless steel
16
Seeger
1
Stainless steel
17
O-ring (lower sealing shaft)
1
FKM
18
Nut
2
Aluminium alloy
19*
End-cap O-ring
2
Nitrilic rubber
20
Screws
8
Stainless steel
21
Spring loading screw
2
Steel alloy
22
Spring cap
2
Steel alloy
23
Spring
2
Steel alloy
24*
O-ring
2
Nitrilic rubber
25
External elastic pin of the yoke
1
Steel alloy
26
Internal elastic pin of the yoke
1
Steel alloy
27
Centering ring
1
Aluminium alloy
* Components of spare part kit

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR1440

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR1440
PosDenominationQ.tyMaterial
1Steel bush1Steel alloy
2Steel pin1Steel alloy
3Body1Aluminium
4Internal spring1Steel alloy
5*O-ring2NBR
6Shaft1Steel alloy
7Screw1Steel alloy
8*Bearing (shaft bottom)1Acetalic resin
9*O-ring1FKM
10*O-ring1FKM
11Low bearing bush1Aluminium
12Screw2Steel alloy
13Bearing shaft1Acetalic resin
14Spacer1Aluminium
15Cap1Aluminium
16Cap screw7Steel alloy
17Cap nut7Steel alloy
18Grub screw1Steel alloy
19Nut1Steel alloy
20Grub screw1Steel alloy
21*O-ring1NBR
22Scotch yoke1Steel alloy
23Bearing shaft1Acetalic resin
24*O-ring2NBR
25*Bearing (shaft top)1Acetalic resin
26*O-ring1FKM
27*Thrust bearing1Acetalic resin
28Washer1Steel alloy
29Seeger1Steel alloy
30Spring pin1Steel alloy
31*Bearing (piston back)2Acetalic resin
32Piston1Aluminium
33*O-ring1NBR
34*Bearing (piston head)1P.T.F.E. Carbo-Graphite filled
35Lateral Cylinder1Steel alloy
36*O-ring2NBR
37Cap1Steel alloy
38Cap screws7Steel alloy
39Nut7Steel alloy
40*O-ring1NBR
41Nut1Steel alloy
42Cap Nut1Steel alloy
43Screw1Steel alloy
44O-ring1NBR
45Spring cap1Aluminium
46O-ring1NBR
47Spring cup1Aluminium
48External spring1Steel alloy
* Components of spare part kit

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR1920

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR1920
PosDenominationQ.tyMaterial
1Cylinder1Aluminium alloy
2Piston2Aluminium alloy
3Cap2Aluminium alloy
4Shaft1Stainless steel
5Scotch yoke1Steel alloy
6Bearing shaft1Acetalic resins
7Bearing shaft1Acetalic resins
8Bearing (shaft bottom)1Acetalic resins
9Bearing (shaft top)1Acetalic resins
10Steel bush2Steel alloy
11Steel pin2Steel alloy
12Bearing (piston head)2P.T.F.E. Carbo-Graphite filled
13*Bearing (piston back)4Acetalic resins
14*O-ring2NBR
15*O-ring1FKM
16Thrust bearing1Acetalic resins
17Washer1Stainless steel
18Seeger1Stainless steel
19*O-ring2NBR
20*O-ring1FKM
21*O-ring2NBR
22*O-ring2NBR
23Cap nut12Stainless steel
24Grub screws2Stainless steel
25*O-ring2NBR
26Nut2Stainless steel
27Spring4Steel alloy
28*O-ring2NBR
29Nut2Stainless steel
30Cap nut2Stainless steel
31Spring cap2Aluminium alloy
32Screw2Stainless steel
33Cylinder2Aluminium alloy
34Screw1Stainless steel
35**Center ring1Aluminium alloy
36Cap screw12Steel alloy
37Spring pin2Steel alloy
* Components of spare part kit
**OPTIONAL

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR2880


SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR2880
Pos
Denomination
Q.ty
Material
1
Steel bush
2
Steel alloy
2
Steel pin
2
Steel alloy
3
Adjustment screw
1
Steel alloy
4
Left stop
1
Steel alloy
5*
O-ring
2
NBR
6
Protection cap
1
Aluminium
7
Antirotation washer
1
Steel alloy
8
Metal ring
1
Stainless steel
9*
O-ring
1
NBR
10
Carter
1
Aluminium
11
Screw
4
Steel alloy
12
Metal ring
1
Stainless steel
13
Right stop
1
Steel alloy
14
Screw
1
Steel alloy
15
Shaft
1
Steel alloy
16
Bearing (shaft bottom)
1
Acetalic resins
17
low bearing bush
1
Aluminium
18
Screw
2
Steel alloy
19*
O-ring
1
FKM
20
Bearing shaft
1
Acetalic resins
21*
Bearing (piston back)
4
Acetalic resins
22
Spring pin
2
Steel alloy
23
Lateral cylinder
2
Aluminium
24*
O-ring
2
NBR
25
Cap
2
Aluminium
26
Cap screws
14
Steel alloy
27
Cap nut
14
Steel alloy
28Cap nut
2Steel alloy
29Nut
2Steel alloy
30*O-ring
2NBR
31*Bearing (piston head)
2P.T.F.E. Carbo-Graphite filled
32*O-ring
2NBR
33Piston
2Aluminium
34Scotch yoke
1Steel alloy
35Bearing shaft
1Acetalic resins
36*O-ring
2NBR
37*O-ring
2NBR
38Body
1Aluminium
39*Bearing (shaft top)
1Acetalic resins
40*O-ring
1FKM
41*Thrust bearing
1Acetalic resins
42Washer
1Steel alloy
43Seeger
1Steel alloy
44Screw
2Steel alloy
45*O-ring
2NBR
46Spring cap
2Aluminium
47*O-ring
2NBR
48Spring cap
2Aluminium
49External spring
2Steel alloy
50Internal spring
2Steel alloy
51*Gasket
1NBR
52*O-ring
1FKM
53Washer
1Steel alloy
54Seeger
2Steel alloy
*  Components of spare part kit

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR4000

SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: SR4000
PosDenominationQ.tyMaterial
1Steel bush2Steel Alloy
2Steel pin2Steel Alloy
3Regulation screw1Steel Alloy
4Left stop1Steel Alloy
5*O-ring2NBR
6Protection cap1Aluminium
7Antirotation washer1Steel Alloy
8Metal ring1Stainless steel
9*O-ring1NBR
10Carter1Aluminium
11Screw4Steel Alloy
12Metal ring1Stainless steel
13Right stop1Steel Alloy
14Screw1Steel Alloy
15Shaft1Steel Alloy
16Bearing (shaft bottom)1Acetalic Resins
17Interface F251Aluminium
18Screw2Steel Alloy
19*O-ring1FKM
20Bearing shaft1Acetalic Resins
21Bearing (piston back)4Acetalic Resins
22Spring pin2Steel Alloy
23Lateral cylinder2Aluminium
24*O-ring2NBR
25Cap2Aluminium
26Cap screws14Steel Alloy
27Cap nut28Steel Alloy
28Nut2Steel Alloy
29Screw2Steel Alloy
30*O-ring2NBR
31*Bearing (piston head)2P.T.F.E. Carbo-Graphite filled
32*O-ring2NBR
33Piston2Aluminium
34Scotch Yoke1Steel alloy
35Bearing shaft1Acetalic Resins
36*O-ring2NBR
37*O-ring18NBR
38Body1Aluminium
39*Bearing (Shaft top)1Acetalic resins
40*O-ring1FKM
41*Thrust bearing1Acetalic resins
42Washer1Steel alloy
43Seeger1Steel alloy
44*Gasket1NBR
45Washer1Steel alloy
46Seeger2Steel alloy
47Flange2Aluminium
48Screw14Steel alloy
49Grub screw2Steel alloy
50Flange2Aluminium
51*O-ring2NBR
52Cap nut2Steel alloy
53External spring2Steel alloy
54Internal spring2Steel alloy
55Spring cap2Aluminium
56O-ring2NBR
57O-ring2NBR
58Spring cap2Aluminium
* Components of spare part kit

Output torque diagram related to rotation angle

  OUTPUT TORQUE TABLE (Nm)            α°= ROTATION ANGLE
SIZE
α°
2,8 bar ÷ 40 PSI
3,5 bar ÷ 50 PSI
4,2 bar ÷ 60 PSI
5,6 bar ÷ 80 PSI
air
spring
air
spring
air
 spring
air
spring
SRN 15

7,5
5
9,3
6,3
11,3
7,5
15
10
50°
3,7
3,7
4,7
4,7
5,6
5,6
7,5
7,5
90°
5
7,5
6,3
9,3
7,5
11,3
10
15
SRN 30

15
10
18,8
12,5
22,5
15
30
20
50°
7,5
7,5
9,4
9,4
11,3
11,3
15
15
90°
10
15
12,5
18,8
15
22,5
20
30
SRN 53

26,5
17,5
33
22
40
26
53
35
50°
13
13
16,5
16,5
19,5
19,5
26
26
90°
17,5
26,5
22
33
26
40
35
53
SRN 60

30
20
37,5
25
45
30
60
40
50°
15
15
18,8
18,8
22,5
22,5
30
30
90°
20
30
25
37,5
30
45
40
60
SRN 90

45
30
56,4
37,5
67,5
45
90
60
50°
22,5
22,5
28,2
28,2
33,9
33,9
45
45
90°
30
45
37,5
56,4
45
67,5
60
90
SRN 120

60
40
75
50
90
60
120
80
50°
30
30
37,5
37,5
45
45
60
60
90°
40
60
50
75
60
90
80
120
SRN 180

90
60
112,5
75
135
90
180
120
50°
45
45
56,2
56,2
67,5
67,5
90
90
90°
60
90
75
112,5
90
135
120
180
SRN 240

120
80
150
100
180
120
240
160
50°
60
60
75
75
90
90
120
120
90°
80
120
100
150
120
180
160
240
SRN 360

180
120
225
150
270
180
360
240
50°
90
90
112,5
112,5
135
135
180
180
90°
120
180
150
225
180
270
240
360
SRN 480

240
160
300
200
360
240
480
320
50°
120
120
150
150
180
180
240
240
90°
160
240
200
300
240
360
320
480
SRN 720

360
240
450
300
540
360
720
480
50°
180
180
225
225
270
270
360
360
90°
240
360
300
450
360
540
480
720
SRN 960

480
320
600
400
720
480
960
640
50°
240
240
300
300
360
360
480
480
90°
320
480
400
600
480
720
640
960
SR 1440

---
---
900
600
---
---
1440
960
50°
---
---
450
450
---
---
720
720
90°
---
---
600
900
---
---
960
1440
SR 1920

960
640
1200
800
1440
960
1920
1280
50°
480
480
600
600
720
720
960
960
90°
640
960
800
1200
960
1440
1280
1920
SR 2880

1440
960
1800
1200
2160
1440
2880
1920
50°
720
720
900
900
1080
1080
1440
1440
90°
960
1440
1200
1800
1440
2160
1920
2880
SR 4000

2000
1340
2500
1675
3000
2010
4000
2680
50°
1000
1000
1250
1250
1500
1500
2000
2000
90°
1340
2000
1675
2500
2010
3000
2680
4000

WORKING PLANE PNEUMATIC ACTUATOR “SR” TYPE

LIMIT SWITCH BOX

MANUAL OVERRIDE WITH HAND WHEEL

NAMUR SOLENOID VALVES

SOLENOID VALVES

ELECTROPNEUMATIC POSITIONER (INTRINSICALLY SAFE)

PNEUMATIC POSITIONER

PROXIMITY LIMIT SWITCHES

ELECTROMECHANICAL LIMIT SWITCHES

PNEUMATIC LIMIT SWITCHES

EXPLOSION PROOF LIMIT SWITCHES II2GD ExdIIC

For more information check the OMAL Accessories Catalogue.

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32th LPG FORUM 2019
32th LPG FORUM 2019
Amsterdam, 24-26 september 2019