GS (spring return) pneumatic actuator CF8M (microcast stainless steel)

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GS15-GS240

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 GD15, 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

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

TECHNICAL FEATURES
Torque from 15 Nm to 240 Nm
Mounting flange according to ISO 5211; F03 - F05 - F07 - F10
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 - general catalogue pneumatic actuator GS  
The actuator automatic closing takes place in clockwise direction by means of its springs
The code numbers after the letters GS always correspond to the breakaway torque in Nm by 5,6 bar air supply
Sizes from GS 30 direct connection with NAMUR solenoid valve
Size GS15 can be provided with NAMUR plate on request
ATEX version in conformity with directive 2014/34/EU

WORKING CONDITION
Temperature: from -20°C to +80°C
Air supply: 5,6 bar; maximum 8,4 bar
Actuating media: filtered dry compressed air, not necessarily lubricated
In case of lubrication use non-detergent oil compatible with the internal materials of the actuator version you are using

GS15

GS30 ÷ GS240

DATA SHEET

Code
GS015516S
GS030516S
GS060516S
GS120516S
GS240516S

Spare seals
KGGSS214
KGGSS216
KGGSS218
KGGSS220
KGGSS222

Size
GS15 F03
GS30 F03-F05
GS60 F05-F07
GS120 F05-F07
GS240 F07-F10

L mm.
134,6
158,4
192,9
246,8
298,4

L1 mm.
194,2
217,9
287,5
341,2
421

L2 mm.
224
246,2
316,5
376,2
463,9

A mm.
80,4
92,5
116,5
136,4
160

D mm.
32,7
37,7
46,2
56,2
68

E mm.
9
11
14
17
22

F mm.
2
2
3
3
3

Ch. G mm.
9
10
12
15
19

H mm.
10
13
13
17
19

N mm.
23
20
30
30
30

X mm.
68
80,3
94,4
117
139,7

J mm.
10,2
12,2
16,3
19,3
24,3

ØK mm.
25
25
35
35
55

Q mm.
50
50
80
80
80

P mm.
25
25
30
30
30

ØU mm.
-
50
70
70
102

ØV mm.
36
36
50
50
70

Y x prof. depth mm.
M5x9
M5x9
M6x11
M6x11
M8x13

W x prof. depth mm.
-
M6x11
M8x15
M8x13
M10x22

air dm³/cycle
0,086
0,16
0,33
0,7
1,38

weight Kg.
1,6
2,4
4,5
7,6
12,9

CASTING CF8M SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: GS15

MATERIALS GS15
Pos
Denomination
Q.ty
Material
1
Cylinder
1
Stainless steel
2*
Cap o-ring
2
Nitrilic rubber
3
Plate (optional)
1
Stainless steel
4
NAMUR plate
1
Stainless steel
5
Shaft
1
Stainless steel
6
Screw
6
Stainless steel
7
Cap
2
Stainless steel
8
Nut
2
Stainless steel
9
Spring loading screw
2
Stainless steel
10
Spring cap
2
Steel alloy
11
Spring
2
Steel alloy
12*
O-ring
2
Nitrilic rubber
13
Screw
4
Stainless steel
14
Seeger
1
Stainless steel
15
Washer
1
Stainless steel
16
Scotch yoke
1
Steel alloy
17Upper shaft support
1Acetalic resin
18Lower shaft support
1Acetalic resin
19Support bush
2Acetalic resin
20External elastic pin of the yoke
1Steel alloy
21Internal elastic pin of the yoke
1Steel alloy
22Piston
2Aluminium alloy
23*Piston's support
4PTFE caric carbo-graphite
24*Dynamic seal
2Polyurethane
25*Piston o-ring
2Nitrilic rubber
26Rotative sleeve
2Steel alloy
27Bush
2Steel alloy
28O-ring
1FKM
29O-ring
1FKM
30External support ring
1Acetalic resin
31NAMUR o-ring
2Nitrilic rubber
* Components of spare part kit

CASTING CF8M SPRING RETURN PNEUMATIC ACTUATOR COMPONENTS SIZE: GS30-GS240

MATERIALS GS30-GS240
PosDenominationQ.tyMaterial
1Cylinder1Stainless steel
2*Cap o-ring2Nitrilic rubber
3Shaft1Stainless steel
4Screw6Stainless steel
5Cap2Stainless steel
6Spring loading screw2Stainless steel
7Nut2Stainless steel
8Spring cap2Steel alloy
9Spring2Steel alloy
10*O-ring2Nitrilic rubber
11Seeger1Steel alloy
12Washer1Steel alloy
13Lower support bush1Acetalic resin
14Upper support bush1Acetalic resin
15Lower shaft support1Acetalic resin
16Upper shaft support1Acetalic resin
17Scotch yoke1Steel alloy
18External elastic pin of yoke1Steel alloy
19Internal elastic pin of yoke1Steel alloy
20O-ring upper sealing shaft1FKM
21O-ring low sealing shaft1FKM
22Piston2Aluminium alloy
23*Piston's support4PTFE caric. carbo-graphite
24*Dynamic seal2Polyurethane
25Rotative sleeve2Steel alloy
26Bush2Steel alloy
27*Piston o-ring2Nitrilic rubber
28External support o-ring1Acetalic resin
* Components of spare part kit

GS PNEUMATIC ACTUATOR OPERATING DIAGRAM

Drawings on the left = valve in open position
Drawings on the right = valve in closed position


Typical air connection diagram
The pistons of the standard GS actuators are mounted as shown above. Although the spring force is small, the geometry of the mechanism provides more torque at the end of stroke. When the actuator is in the valve open position and the springs are fully compressed, the end stops can be adjusted with precision. Reverse acting spring return actuators are required when the valve needs to open automatically in the case that the pressurized air or power supply is turned off. In reverse acting actuators, the pistons are inserted into the cylinder in the same way as in the Double Acting version and, due to the force of the spring, the actuator opens normally. Caution. The normal torque performance in the reverse acting version, due to its construction, is different from that of the standard version. Caution. To prevent dust or dirt from being sucked into the actuator chamber during spring action, install a filter on port 2. Port 4 is connected to the middle chamber and, when pressurized, the drive shaft rotates anticlockwise to open. In accordance with the international standard ISO 5599-2, the position, location, orientation and shape of the actuator air port connections must be clearly identified and marketed using numbers 2 and 4.

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For more information check the ACTUATECH Accessories Catalogue.