GEM GSR0050 User manual

GEMÜ GDR/GSR
Pneumatic basic quarter turn actuators
Operating instructions
EN
further information
webcode: GW-GDR/GSR

All rights including copyrights or industrial property rights are expressly reserved.
Keep the document for future reference.
© GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
23.08.2022
www.gemu-group.com2 / 32GEMÜ GDR/GSR

Contents
1 General information ............................................. 4
1.1 Information ............................................... 4
1.2 Symbols used ........................................... 4
1.3 Definition of terms .................................... 4
1.4 Warning notes ........................................... 4
2 Safety information ............................................... 5
3 Product description ............................................. 5
3.1 Construction ............................................. 5
3.2 Description ............................................... 7
3.3 Function .................................................... 7
3.4 Product label ............................................ 7
4 Correct use .......................................................... 7
5 Order data ........................................................... 8
5.1 Order codes .............................................. 8
5.2 Order example .......................................... 8
5.3 Short code for actuator ............................. 9
6 Technical data ..................................................... 10
6.1 Medium .................................................... 10
6.2 Temperature ............................................. 10
6.3 Pressure ................................................... 10
6.4 Torques .................................................... 12
6.5 Mechanical data ........................................ 13
7 Dimensions .......................................................... 14
7.1 Actuator .................................................... 14
7.2 Actuator flange ......................................... 16
8 Manufacturer's information .................................. 17
8.1 Delivery .................................................... 17
8.2 Transport .................................................. 17
8.3 Storage ..................................................... 17
9 Disassembly ........................................................ 17
9.1 Preparations for disassembly .................... 17
9.2 Disassembly ............................................. 18
10 Assembly ............................................................. 19
11 Changing the rotational direction ......................... 20
12 Pneumatic connection ......................................... 24
12.1 Connecting the control medium ................ 24
12.2 Optical position indicator .......................... 24
13 Setting the end positions ..................................... 24
14 Commissioning .................................................... 25
15 Operation ............................................................. 25
15.1 Functional principle .................................. 25
16 Troubleshooting .................................................. 27
17 Inspection/maintenance ...................................... 28
17.1 General information regarding actuator re-
placement ................................................. 28
17.2 Spare parts ............................................... 29
18 Disposal .............................................................. 29
19 Returns ................................................................ 29
20 Declaration of Incorporation according to
2006/42/EC (Machinery Directive) ....................... 30
21 Declaration of conformity according to 2014/68/
EU (Pressure Equipment Directive) ...................... 31
GEMÜ GDR/GSRwww.gemu-group.com 3 / 32

www.gemu-group.com4 / 32GEMÜ GDR/GSR
1 General information
1 General information
1.1 Information
- The descriptions and instructions apply to the standard ver-
sions. For special versions not described in this document
the basic information contained herein applies in combina-
tion with any additional special documentation.
- Correct installation, operation, maintenance and repair work
ensure faultless operation of the product.
- Should there be any doubts or misunderstandings, the Ger-
man version is the authoritative document.
- Contact us at the address on the last page for staff training
information.
1.2 Symbols used
The following symbols are used in this document:
Symbol Meaning
Tasks to be performed
Response(s) to tasks
– Lists
1.3 Definition of terms
Working medium
The medium that flows through the GEMÜ product.
Control function
The possible actuation functions of the GEMÜ product.
Control medium
The medium whose increasing or decreasing pressure causes
the GEMÜ product to be actuated and operated.
1.4 Warning notes
Wherever possible, warning notes are organised according to
the following scheme:
SIGNAL WORD
Type and source of the danger
Possible
symbol for the
specific
danger
Possible consequences of non-observance.
Measures for avoiding danger.
Warning notes are always marked with a signal word and
sometimes also with a symbol for the specific danger.
The following signal words and danger levels are used:
DANGER
Imminent danger!
▶Non-observance can cause death or
severe injury.
WARNING
Potentially dangerous situation!
▶Non-observance can cause death or
severe injury.
CAUTION
Potentially dangerous situation!
▶Non-observance can cause moderate
to light injury.
NOTICE
Potentially dangerous situation!
▶Non-observance can cause damage to
property.
The following symbols for the specific dangers can be used
within a warning note:
Symbol Meaning
Danger of explosion
Actuator under spring pressure!
Corrosive chemicals!
GEMÜ products without an operator!
Hot plant components!
Danger – bodily injury!

www.gemu-group.com 5 / 32 GEMÜ GDR/GSR
2 Safety information
The safety information in this document refers only to an indi-
vidual product. Potentially dangerous conditions can arise in
combination with other plant components, which need to be
considered on the basis of a risk analysis. The operator is re-
sponsible for the production of the risk analysis and for com-
pliance with the resulting precautionary measures and re-
gional safety regulations.
The document contains fundamental safety information that
must be observed during commissioning, operation and main-
tenance. Non-compliance with these instructions may cause:
- Personal hazard due to electrical, mechanical and chemical
effects.
- Hazard to nearby equipment.
- Failure of important functions.
- Hazard to the environment due to the leakage of dangerous
substances.
The safety information does not take into account:
- Unexpected incidents and events, which may occur during
installation, operation and maintenance.
- Local safety regulations which must be adhered to by the
operator and by any additional installation personnel.
Prior to commissioning:
1. Transport and store the product correctly.
2. Do not paint the bolts and plastic parts of the product.
3. Carry out installation and commissioning using trained
personnel.
4. Provide adequate training for installation and operating
personnel.
5. Ensure that the contents of the document have been fully
understood by the responsible personnel.
6. Define the areas of responsibility.
7. Observe the safety data sheets.
8. Observe the safety regulations for the media used.
During operation:
9. Keep this document available at the place of use.
10. Observe the safety information.
11. Operate the product in accordance with this document.
12. Operate the product in accordance with the specifications.
13. Maintain the product correctly.
14. Do not carry out any maintenance work and repairs not de-
scribed in this document without consulting the manufac-
turer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
3 Product description
3.1 Construction
GDR/GSR 0032
18
21 20 19 22
17
16 13 12
10
8
7
2
3
1
12 13 16 17
18
22
19 20 21
Item Quant-
ity
Name Material
01 1 Housing Extruded aluminium -
hard anodized
02 1 Blow-out proof shaft Nickel-plated steel
03* 1 Lower shaft O-ring NBR
07* 1 Upper shaft O-ring NBR
08* 1 Shaft washer POM
10* 1 Shaft snap ring Nickel-plated steel
12 2 Piston Aluminium diecasting
13* 2 Piston O-ring NBR
16* 2 Seat end cap NBR
17 2 End cap Aluminium diecasting
epoxy resin coating
18 8 End cap fixing screw Stainless steel
19* 2 Stop bolt O-ring NBR
20 2 Stop bolt retaining nut
ring
Stainless steel
21 2 Locking nut Stainless steel
22 2 Stop bolt Stainless steel
* available as spare part
3 Product description

www.gemu-group.com6 / 32GEMÜ GDR/GSR
3 Product description
GDR/GSR 0050 – 0125
18
10
3
8
2
17
24
11
7
22
1
16
11
15
20
19
14
6
5
13 12
18
24
17
16
15
14
13
12
21
Item Quant-
ity
Name Materials
01 1 Housing Extruded aluminium -
hard anodized
02 1 Blow-out proof shaft Nickel-plated steel
03* 1 Lower shaft O-ring NBR
05 1 Cam Stainless steel
06* 1 Cam spacer ring POM
07* 1 Upper shaft O-ring NBR
08* 1 Shaft washer POM
10* 1 Shaft snap ring Nickel-plated steel
11* 2 Piston thrust block POM
12 2 Piston Aluminium diecasting
13* 2 Piston O-ring NBR
14* 2 Antifriction ring POM
15 X* Springs Spring steel
16* 2 Seat end cap NBR
17 2 End cap Aluminium diecasting
epoxy resin coating
18 8 End cap fixing screw Stainless steel
19* 2 Stop bolt O-ring NBR
20 2 Stop bolt retaining nut
ring
Stainless steel
21 2 Locking nut Stainless steel
22 2 Stop bolt Stainless steel
23 8 End cap fixing screw
ring
Stainless steel
* available as spare part
GDR/GSR 0140 – 0160
18
10
8
17
24 16 15 19
14 13 12
18
24
20
3
2
11
7
22
20
6
5
1
17
16
15
14
13
12
Item Quant-
ity
Name Materials
01 1 Housing Extruded aluminium -
hard anodized
02 1 Blow-out proof shaft Nickel-plated steel
03* 1 Lower shaft O-ring NBR
04* 1 Shaft spacer ring POM
05 1 Cam Stainless steel
06* 1 Cam spacer ring POM
07* 1 Upper shaft O-ring NBR
08* 1 Shaft washer POM
10* 1 Shaft snap ring Nickel-plated steel
11* 2 Piston thrust block POM
12 2 Piston Aluminium diecasting
13* 2 Piston O-ring NBR
14* 2 Antifriction ring POM
15 X* Springs Spring steel
16* 2 Seat end cap NBR
17 2 End cap Aluminium diecasting
epoxy resin coating
18 8 End cap fixing screw Stainless steel
19* 2 Stop bolt O-ring NBR
20 2 Stop bolt retaining nut
ring
Stainless steel
21 2 Locking nut Stainless steel
22 2 Stop bolt Stainless steel
23 8 End cap fixing screw
ring
Stainless steel
* available as spare part

www.gemu-group.com 7 / 32 GEMÜ GDR/GSR
GDR/GSR 0180
18
17
16
15 19
14 13 12 21
9
81
6
7
3
5
22 20
2
4
17
16
15
14
13
12
23
1
18
10
11
Item Quant-
ity
Name Materials
1 1 Housing Extruded aluminium -
hard anodized
2 1 Blow-out proof shaft Nickel-plated steel
3* 1 Lower shaft O-ring NBR
4* 1 Shaft spacer ring POM
5 1 Cam Stainless steel
6* 1 Cam spacer ring POM
7* 1 Upper shaft O-ring NBR
8* 1 Upper shaft spacer
ring
POM
9* 1 Shaft washer Stainless steel
10* 1 Shaft snap ring Nickel-plated steel
11* 2 Piston thrust block POM
12 2 Piston Aluminium diecasting
13* 2 Piston O-ring NBR
14* 2 Antifriction ring POM
15 X* Springs Spring steel
16* 2 Seat end cap NBR
17 2 End cap Aluminium diecasting
epoxy resin coating
18 8 End cap fixing screw Stainless steel
19* 2 Stop bolt O-ring NBR
20 2 Stop bolt retaining nut
ring
Stainless steel
21 2 Locking nut Stainless steel
22 2 Stop bolt Stainless steel
23 2 Body O-Ring NBR
* available as spare part
3.2 Description
The pneumatic basic actuators GEMÜ GSR and GEMÜ GDR
are quarter turn actuators with clockwise rotation for Open/
Close applications. Single acting (GEMÜ GSR) or double act-
ing versions (GEMÜ GDR) are available. With their standard-
ized connection for pilot valves, position feedback and
flanged connection according to ISO 5211, they are suitable
for mounting on butterfly valves and ball valves.
3.3 Function
The pneumatic quarter turn actuator has a compact design.
Control air (compressed air) moves a piston which performs
rotation through 90°. Rotation through 90°. is achieved by the
spindle. An optical position indicator can be seen above the
shaft. The end positions can be retrieved here using mi-
croswitches.
Control pressure: 2.5 – 8 bar
3.4 Product label
Pneumatic actuator
Single acting
Actuator must be isolated electrically and
pneumatically prior to dismantling.
Actuator in accordance with:
EN 15714-3
Max. perm. Pressure: 8 bar
Working Temp.of standard type:
-20°C +85°C (W/std. NBR O-ring)
Pressure connection: G 1/4"
Normally Close
Normally Open
Housing under
spring pressure.
Fig.1: Example product label GSR 100-240
4 Correct use
DANGER
Danger of explosion
▶Risk of death or severe injury.
●Do not use the product in potentially
explosive zones.
WARNING
Improper use of the product
▶Risk of severe injury or death.
▶Manufacturer liability and guarantee will be void.
●Only use the product in accordance with the operating
conditions specified in the contract documentation and in
this document.
The product is not intended for use in potentially explosive
areas.
4 Correct use

5 Order data
The order data provide an overview of standard configurations.
Please check the availability before ordering. Other configurations available on request.
For possible actuator configurations and preferred series
Products ordered with bold marked ordering options are so-called preferred series. Depending on the nominal size, these are
available more quickly.
Order codes
1 Type Code
Basic actuator, pneumatic, single acting, clockwise
rotation
GSR
Basic actuator, pneumatic, double acting, clockwise
rotation
GDR
2 Actuator size Code
0032 (GDR/GDL) 0032
0050 (GDR/GDL/GSR/GSL) 0050
0065 (GDR/GDL/GSR/GSL) 0065
0075 (GDR/GDL/GSR/GSL) 0075
0085 (GDR/GDL/GSR/GSL) 0085
0100 (GDR/GDL/GSR/GSL) 0100
0115 (GDR/GDL/GSR/GSL) 0115
0125 (GDR/GDL/GSR/GSL) 0125
0140 (GDR/GDL/GSR/GSL) 0140
0160 (GDR/GDL/GSR/GSL) 0160
0180 (GDR/GDL/GSR/GSL) 0180
3 Spring set Code
Actuator GEMÜ GSR
Spring configuration, non chambered (GSR/GSL) SC4
Spring configuration, non chambered (GSR/GSL) SC5
Number of springs (GDR/GDL) S12
Number of springs (GDR/GDL) S14
Actuator GEMÜ GDR
Without
4 Actuator flange Code
F03, flange type DIN EN ISO 5211 F03
F05, flange type DIN EN ISO 5211 F05
F07, flange type DIN EN ISO 5211 F07
F10, flange type DIN EN ISO 5211 F10
5 Actuator flange Code
F05, flange type DIN EN ISO 5211 /05
F07, flange type DIN EN ISO 5211 /07
F10, flange type DIN EN ISO 5211 /10
F12, flange type DIN EN ISO 5211 /12
F14, flange type DIN EN ISO 5211 /14
6 Coupling and wrench size Code
Star, WAF = 9 mm S09
Star, WAF = 11 mm S11
Star, WAF = 14 mm S14
Star, WAF = 17 mm S17
Star, WAF = 22 mm S22
Star, WAF = 27 mm S27
Star, WAF = 36 mm S36
Star, WAF = 46 mm S46
Star, WAF = 55 mm S55
7 Material Code
Gen. industrial version (GSR/GSL/GDR/GDL),
body alu, anodising layer 25-35µm, end caps alu,
powder coated,
shaft C steel + ENP, bolts A2
A
Order example
Ordering option Code Description
1 Type GDR Basic actuator, pneumatic, double acting, clockwise rotation
2 Actuator size 0050 0050 (GDR/GDL/GSR/GSL)
3 Spring set Without
4 Actuator flange F03 F03, flange type DIN EN ISO 5211
5 Actuator flange /05 F05, flange type DIN EN ISO 5211
6 Coupling and wrench size S11 Star, WAF = 11 mm
7 Material A Gen. industrial version (GSR/GSL/GDR/GDL),
body alu, anodising layer 25-35µm, end caps alu, powder coated,
shaft C steel + ENP, bolts A2
5 Order data
www.gemu-group.com8 / 32GEMÜ GDR/GSR

5.3 Short code for actuator
Short codes
1 GEMUE type Code
Actuator GEMÜ GSR
GSR0050 GR05
GSR0065 GR06
GSR0075 GR07
GSR0085 GR08
GSR0100 GR10
GSR0115 GR11
GSR0125 GR12
GSR0140 GR14
GSR0160 GR16
GSR0180 GR18
Actuator GEMÜ GDR
GDR0032 HR03
GDR0050 HR05
GDR0065 HR06
GDR0075 HR07
GDR0085 HR08
GDR0100 HR10
GDR0115 HR11
GDR0125 HR12
GDR0140 HR14
GDR0160 HR16
GDR0180 HR18
2 GEMUE actuator spring set Code
Actuator GEMÜ GSR
S06, number of springs (GSR/GSL) E
S08, number of springs (GSR/GSL) F
S10, number of springs (GSR/GSL) G
S12, number of springs (GSR/GSL) H
S14, number of springs (GSR/GSL) K
2 GEMUE actuator spring set Code
SC1, spring configuration, non chambered (GSR/GSL) O
SC2, spring configuration, non chambered (GSR/GSL) P
SC3, spring configuration, non chambered (GSR/GSL) Q
SC4, spring configuration, non chambered (GSR/GSL) R
SC5, spring configuration, non chambered (GSR/GSL) S
Actuator GEMÜ GDR
0, springs per side (GDR/GDL) A
3 GEMUE connection Code
F03
F03 S09 T
F03/F05
F03/05 S09 N
F03/05 S11 W
F05/F07
F05/07 S12 Y
F05/07 S14 P
F05/07 S17 C
F07/F10
F07/10 S14 8
F07/10 S17 E
F07/10 S22 D
F10/F12
F10/12 S22 A
F10/12 S27 G
F10/F14
F10/14 S27 B
F10/14 S36 H
4 GEMUE actuator version Code
General industrial version (GSR/GSL/GDR/GDL) 0
Short code example
Ordering option Code Description
1 GEMUE type GR05 GSR0050
2 GEMUE actuator spring set S SC5, spring configuration, non chambered (GSR/GSL)
3 GEMUE connection W F03/05 S11
4 GEMUE actuator version 0 General industrial version (GSR/GSL/GDR/GDL)
5 Order data
www.gemu-group.com 9 / 32 GEMÜ GDR/GSR

6 Technical data
6.1 Medium
Control medium: Compressed air and inert gases
Dust content: Class 3, max. particle size 5 μm, max. particle density 5 mg/m³
Pressure dew point: Class 3, max. pressure dew point -20 °C
Oil content: Class 3, max. oil concentration 1 mg/m³
Quality classes to DIN ISO 8573-1
6.2 Temperature
Ambient temperature: -20 — 85 °C
Storage temperature: 0 — 40 °C
6.3 Pressure
Control pressure: 2.5 — 8 bar
Air volume: GDR (double acting)
Type clockwise
rotation
0032 0.03
0050 0.13
0065 0.23
0075 0.44
0085 0.64
0100 1.00
0115 1.71
0125 2.21
0140 3.12
0160 4.76
0180 7.29
Air consumption in l/stroke
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6 Technical data

Air consumption: GDR (double acting)
Type Control pressure [bar]
2.5 3 3.5 4 4.5 5 5.5 6 7 8
0032 0.24 0.28 0.31 0.35 0.38 0.42 0.45 0.48 0.55 0.62
0050 0.80 0.91 1.02 1.14 1.25 1.37 1.48 1.59 1.82 2.05
0065 1.46 1.66 1.87 2.08 2.29 2.49 2.70 2.91 3.32 3.74
0075 2.77 3.17 3.56 3.96 4.35 4.75 5.14 5.54 6.33 7.12
0085 3.99 4.56 5.12 5.69 6.26 6.83 7.39 7.96 9.10 10.23
0100 6.21 7.09 7.97 8.86 9.74 10.63 11.51 12.39 14.16 15.93
0115 10.4 11.88 13.37 14.85 16.33 17.81 19.29 20.77 23.73 26.69
0125 13.32 15.21 17.11 19.00 20.90 22.79 24.69 26.58 30.38 34.17
0140 19.32 22.07 24.81 27.56 30.31 33.06 35.81 38.56 44.06 49.56
0160 29.03 33.16 37.29 41.42 45.55 49.68 53.81 57.95 66.21 74.47
0180 41.41 47.30 53.19 59.09 64.98 70.87 76.77 82.66 94.45 106.23
Basic actuator with 90° angle of rotation
Air consumption in l
GSR (single acting)
Type Control pressure [bar]
2.5 3 3.5 4 4.5 5 5.5 6 7 8
0050 0.38 0.44 0.49 0.54 0.60 0.65 0.71 0.76 0.87 0.98
0065 0.66 0.75 0.85 0.94 1.03 1.13 1.22 1.32 1.50 1.69
0075 1.25 1.43 1.60 1.78 1.96 2.14 2.31 2.49 2.85 3.20
0085 1.84 2.10 2.36 2.62 2.88 3.15 3.41 3.67 4.19 4.72
0100 2.77 3.17 3.56 3.96 4.35 4.75 5.14 5.54 6.33 7.12
0115 4.79 5.47 6.15 6.83 7.51 8.19 8.87 9.55 10.92 12.28
0125 6.17 7.05 7.93 8.81 9.69 10.57 11.44 12.32 14.08 15.84
0140 9.09 10.38 11.67 12.97 14.26 15.55 16.85 18.14 20.72 23.31
0160 12.21 13.94 15.68 17.42 19.16 20.89 22.63 24.37 27.84 31.32
0180 19.25 21.99 24.73 27.47 30.2 32.94 35.68 38.42 43.90 49.38
Basic actuator with 90° angle of rotation
Air consumption in l/stroke
Air consumption formula: Q = n x V x (Pe + Pamb)/Pamb
Q = air consumption [l / stroke], n = number of strokes, V = air volume [l],
Pe= control pressure [bar], Pamb = ambient pressure (1.013) [bar]
GEMÜ GDR/GSRwww.gemu-group.com 11 / 32
6 Technical data

6.4 Torques
GDR (double acting)
Type Control pressure [bar]
2,5 3.0 4.0 4.5 5.0 5.5 6.0 7.0 8.0
0032 3.5 4.2 5.8 6.6 7.3 8.0 8.8 10.0 11.5
0050 8.4 10.2 13.5 15.3 17.2 18.8 20.6 24.1 27.9
0065 15.3 18.7 25.5 28.8 32.3 35.5 38.8 45.6 52.4
0075 27.0 32.6 44.2 49.8 55.8 61.4 67.1 78.6 90.2
0085 40.3 49.0 66.5 75.4 84.4 93.1 101.9 119.3 137.0
0100 61.4 74.4 100.4 113.6 126.8 139.9 153.1 179.5 205.6
0115 103.6 125.6 170.1 192.2 214.7 236.6 258.7 303.1 347.7
0125 136.3 165.3 223.5 261.0 282.2 310.9 340.1 398.3 457.0
0140 190.0 228.0 304.0 342.0 380.0 418.0 456.0 532.0 608.0
0160 287.0 344.0 459.0 516.0 574.0 631.0 689.0 803.0 918.0
0180 468.0 562.0 749.0 842.0 936.0 1030.0 1123.0 1310.0 1498.0
Torques in Nm
GSR (einfachwirkend)
Type Sprin
g set
Spring
torque
Control pressure [bar]
4.0 4.5 5.0 5.5 6.0 7.0 8.0
0° 90° 0° 90° 0° 90° 0° 90° 0° 90° 0° 90° 0° 90° 0° 90°
0050 SC4 5.2 8.5 7.3 3.0 8.4 4.9 11.0 6.8 12.8 8.5 14.4 10.1 18.8 14.5
0050 SC5 6.0 10.0 7.5 3.5 9.5 4.3 11.4 6.2 13.3 8.1 17.1 11.9 20.9 15.7
0065 SC4 7.7 17.0 13.0 4.9 15.1 8.0 19.8 11.3 22.8 14.5 26.0 17.1 35.0 26.0
0065 SC5 10.1 20.4 14.2 4.4 18.2 7.1 21.7 10.6 24.6 13.8 32.0 21.0 39.0 28.0
0075 SC4 14.6 30.0 26.0 4.4 27.0 8.8 38.0 13.4 44.0 17.4 50.0 21.5 60.0 42.0
0075 SC5 18.1 37.0 20.7 7.4 34.0 11.3 40.0 17.5 46.0 23.7 55.0 33.0 68.0 45.0
0085 SC4 26.0 47.0 36.0 10.1 39.0 17.4 50.0 26.0 61.0 33.0 70.0 42.0 90.0 67.0
0085 SC5 34.0 58.0 32.0 6.5 47.0 14.1 56.0 23.0 63.0 38.0 82.0 54.0 100.0 72.0
0100 SC4 39.0 72.0 56.0 12.0 62.0 26.0 82.0 40.0 95.0 54.0 109.0 67.0 141.0 101.0
0100 SC5 49.0 91.0 55.0 9.5 73.0 23.2 86.0 37.0 99.0 50.0 130.0 82.0 158.0 110.0
0115 SC4 53.0 103.0 102.0 35.0 106.0 46.0 149.0 82.0 172.0 105.0 195.0 128.0 242.0 175.0
0115 SC5 69.0 140.0 99.0 32.0 129.0 48.0 152.0 71.0 175.0 95.0 222.0 141.0 269.0 188.0
0125 SC4 72.0 151.0 134.0 46.0 138.0 56.0 189.0 107.0 216.0 138.0 242.0 168.0 318.0 229.0
0125 SC5 94.0 199.0 114.0 40.0 167.0 58.0 194.0 88.0 217.0 119.0 290.0 180.0 351.0 241.0
0140 SC4 116.0 22.0 173.0 52.0 196.0 92.0 252.0 135.0 292.0 176.0 332.0 216.0 440.0 311.0
0140 SC5 148.0 291.0 229.0 72.0 262.0 113.0 295.0 152.0 402.0 237.0 484.0 319.0
0160 SC4 160.0 275.0 262.0 135.0 325.0 198.0 378.0 234.0 429.0 302.0 485.0 355.0 598.0 498.0
0160 SC5 214.0 365.0 340.0 180.0 400.0 240.0 456.0 298.0 563.0 421.0 682.0 506.0
0180 S12 322.0 507.0 465.0 267.0 551.0 357.0 644.0 453.0 733.0 540.0 905.0 712.0
0180 S14 394.0 596.0 490.0 270.0 580.0 326.0 674.0 427.0 847.0 600.0 1020.
0
773.0
Torques in Nm
0° - actuator springs released
90° - actuator springs tensioned
www.gemu-group.com12 / 32GEMÜ GDR/GSR
6 Technical data

6.5 Mechanical data
Angle of rotation: 90°, ±5° adjustable (85° - 95°)
Switching times: Type GDR (double
acting)
GSR (single
acting)
0032 0.03 -
0050 0.04 0.09
0065 0.08 0.14
0075 0.12 0.22
0085 0.19 0.33
0100 0.27 0.46
0115 0.47 0.78
0125 0.66 0.9
0140 0.88 1.14
0160 1.1 1.34
0180 1.4 1.76
Switching times in s
Switching times at 6 bar pressure without valve
Weight: Type GDR (double
acting)
GSR (single
acting)
90° 90°
0032 0.5 -
0050 1.1 1.2
0065 1.5 1.8
0075 2.6 3.2
0085 3.4 4.3
0100 5.1 6.6
0115 8.0 10.6
0125 10.0 13.4
0140 11.0 17.2
0160 19.5 24.4
0180 26.0 37.5
Weights in kg
GEMÜ GDR/GSRwww.gemu-group.com 13 / 32
6 Technical data

7 Dimensions
7.1 Actuator
7.1.1 Type G0032
32
(16)
32
(16)
G
L
B1
B
A3
A
VL
25
4
Z
4,5
P
V
x
x
6 x M5x7
4 x M5x8
Connector 2
Connector 4
Type A A3 B B1 V G P VL Z L
G0032 67.5 45.5 49.0 26.5 40.0 G1/8" 22.0 50.0 20.0 115.0
Dimensions in mm
www.gemu-group.com14 / 32GEMÜ GDR/GSR
7 Dimensions

7.1.2 Type G0050 – G0180
L
G0050 - 0180
B
A3
B1
A
80
VL1
30
G0115 - G0180
80
30
G0050 - G0100
P
V
xx
24
(12)
32
(16)
4 x M5x8
4 x M5x8
8 x M5x8
G
4
Z
4,5
Connector 2
Connector 4
Type A A3 B B1 V G P VL Z L VL1
G0032 67.5 45.5 49.0 26.5 40.0 G1/8" 22.0 50.0 20.0 115.0 -
G0050 92.0 70.0 71.0 30.0 40.0 G1/8" 22.0 80.0 20.0 141.0 -
G0065 102.5 80.5 80.5 35.5 40.0 G1/8" 22.0 80.0 20.0 162.0 -
G0075 119.0 97.0 94.5 42.0 40.0 G1/8" 22.0 80.0 20.0 208.0 -
G0085 130.5 108.5 106.0 47.5 40.0 G1/8" 22.0 80.0 20.0 237.0 -
G0100 143.5 121.5 123.0 55.0 40.0 G1/4" 22.0 80.0 20.0 271.5 -
G0115 174.0 142.0 137.0 64.0 65.0 G1/4" 32.0 80.0 30.0 337.0 130.0
G0125 185.5 153.5 148.0 68.0 65.0 G1/4" 32.0 80.0 30.0 366.0 130.0
G0140 207.9 175.9 164.0 76.5 65.0 G1/4" 32.0 80.0 30.0 428.5 130.0
G0160 225.0 193.0 188.0 88.0 65.0 G1/4" 32.0 80.0 30.0 512.0 130.0
G0180 251.0 219.0 212.5 96.5 65.0 G1/4" 32.0 80.0 30.0 573.0 130.0
Dimensions in mm
GEMÜ GDR/GSRwww.gemu-group.com 15 / 32
7 Dimensions

7.2 Actuator flange
F1
F2
G0050 - G0180
F1
G0032
ØM
T
S
T
4 x R1
4 x R1
4 x R2
Octagonal
Octagonal
Type Actuator
flange
Octagonal M T S F1 R1 F2 R2
G0032 F03 9.0 - 11.0 - 36.0 M5 x 7.5 - -
G0050 F03/F05 9.0 - 11.0 - 36.0 M5 x 7.5 50.0 M6 x 8.0
F03/F05 11.0 11.8 12.0 20.0 36.0 M5 x 7.5 50.0 M6 x 8.0
G0065 F05/F07 11.0 - 15.0 - 50.0 M6 x 8.0 70.0 M8 x 12.0
F05/F07 14.0 14.5 16.0 20.0 50.0 M6 x 8.0 70.0 M8 x 12.0
G0075 F05/F07 14.0 - 19.0 - 50.0 M6 x 8.0 70.0 M8 x 12.0
F05/F07 17.0 18.2 20.0 25.0 50.0 M6 x 8.0 70.0 M8 x 12.0
G0085 F05/F07 14.0 - 19.0 - 50.0 M6 x 8.0 70.0 M8 x 12.0
F05/F07 17.0 18.2 23.0 28.0 50.0 M6 x 8.0 70.0 M8 x 12.0
G0100 F07/F10 14.0 - 19.0 - 70.0 M8 x 10.0 102.0 M10 x 15.0
F07/F10 17.0 18.2 23.0 28.0 70.0 M8 x 10.0 102.0 M10 x 15.0
G0115 F07/F10 17.0 - 25.0 - 70.0 M8 x 10.0 102.0 M10 x 15.0
F07/F10 22.0 23.0 32.0 36.0 70.0 M8 x 10.0 102.0 M10 x 15.0
G0125 F07/F10 17.0 - 25.0 - 70.0 M8 x 10.0 102.0 M10 x 15.0
F07/F10 22.0 23.0 32.0 36.0 70.0 M8 x 10.0 102.0 M10 x 15.0
G0140 F10/F12 22.0 - 32.0 - 102.0 M10 x 15.0 125.0 M12 x 18.0
F10/F12 27.0 28.6 32.0 36.0 102.0 M10 x 15.0 125.0 M12 x 18.0
G0160 F10/F12 22.0 - 32.0 - 102.0 M10 x 15.0 125.0 M12 x 18.0
F10/F12 27.0 28.6 32.0 36.0 102.0 M10 x 15.0 125.0 M12 x 18.0
G0180 F10/F14 27.0 - 32.0 - 102.0 M10 x 15.0 140.0 M16 x 24.0
F12 27.0 - 32.0 - 125.0 M12 x 18.0 - -
F10/F14 36.0 37.5 40.0 52.0 102.0 M10 x 15.0 140.0 M16 x 24.0
F12 36.0 37.5 40.0 52.0 125.0 M12 x 18.0 - -
Dimensions in mm
www.gemu-group.com16 / 32GEMÜ GDR/GSR
7 Dimensions

www.gemu-group.com 17 / 32 GEMÜ GDR/GSR
8 Manufacturer's information
8.1 Delivery
●Check that all parts are present and check for any damage
immediately upon receipt.
The product's performance is tested at the factory. The scope
of delivery is apparent from the dispatch documents and the
design from the order number.
8.2 Transport
1. Only transport the product by suitable means. Do not drop.
Handle carefully.
2. After the installation dispose of transport packaging ma-
terial according to relevant local or national disposal regu-
lations / environmental protection laws.
8.3 Storage
1. Store the product free from dust and moisture in its ori-
ginal packaging.
2. Avoid UV rays and direct sunlight.
3. Do not exceed the maximum storage temperature (see
chapter "Technical data").
4. Do not store solvents, chemicals, acids, fuels or similar
fluids in the same room as GEMÜ products and their spare
parts.
9 Disassembly
9.1 Preparations for disassembly
WARNING
The equipment is subject to pressure!
▶Risk of severe injury or death.
●Depressurize the plant.
●Completely drain the plant.
WARNING
Actuator under spring pressure!
▶Risk of severe injury or death!
●Only open the actuator under a press.
WARNING
Corrosive chemicals!
▶Risk of caustic burns.
●Wear suitable protective gear.
●Completely drain the plant.
WARNING
GEMÜ products without an operator!
▶Risk of severe injury or death.
●Do not apply pressure to GEMÜ
products without an operator installed
in piping.
CAUTION
Hot plant components!
▶Risk of burns.
●Only work on plant that has cooled
down.
CAUTION
Leakage
▶Emission of dangerous materials.
●Provide precautionary measures against exceeding the
maximum permitted pressures caused by pressure
surges (water hammer).
CAUTION
Exceeding the maximum permissible pressure.
▶Damage to the product.
●Provide precautionary measures against exceeding the
maximum permitted pressures caused by pressure
surges (water hammer).
CAUTION
Danger – bodily injury!
▶Risk of severe injury!
●Before performing any work on the
GEMÜ product, depressurize the plant.
9 Disassembly

www.gemu-group.com18 / 32GEMÜ GDR/GSR
9 Disassembly
NOTICE
Suitability of the product!
▶The product must be appropriate for the piping system
operating conditions (medium, medium concentration,
temperature and pressure) and the prevailing ambient
conditions.
1. Check the technical data of the product and the materials.
2. Keep appropriate tools ready.
3. Use appropriate protective gear as specified in plant oper-
ator's guidelines.
4. Observe appropriate regulations for connections.
5. Have installation work carried out by trained personnel.
6. Shut off plant or plant component.
7. Secure the plant or plant component against recommis-
sioning.
8. Depressurize the plant or plant component.
9. Completely drain the plant or plant component and allow it
to cool down until the temperature is below the media va-
porization temperature and cannot cause scalding.
10. Correctly decontaminate, rinse and ventilate the plant or
plant component.
11. Lay piping so that the product is protected against trans-
verse and bending forces, and also from vibrations and
tension.
9.2 Disassembly
1. Loosen the end cap fixing screws 17 to remove the actu-
ator end caps 16.
NOTICE
▶The fixing screws of the end caps are designed with suffi-
cient length to absorb the spring tension.
2. Loosen the nuts 20 to remove the stop bolts 21.
3. For normally closed actuators, turn the blow-out proof
shaft 02 anticlockwise to disengage the pistons 11. For
normally open actuators, turn it clockwise. Remove the
piston from the cylinder.
4. Dismantle the position indicator, angle indicator, shaft
snap ring 09 and remove the shaft washer 08 from the
top.
5. Remove the blow-out proof shaft 02 from the lower part of
the actuator housing 01. Remove the cam spacer ring 06
and the cam 05 through the inside of the body.
6. Clean all actuator parts.
7. Check all parts for wear.
8. Check the interior of the cylinder.
9. Before assembly, replace the O-rings, bushes and slip-in
guides included in the ALEDER maintenance kits.
10. Lubricate actuator parts with plus grease. Apply a thin
layer of grease to O-rings 03, 07 and 12.

www.gemu-group.com 19 / 32 GEMÜ GDR/GSR
10 Assembly
After disassembly, the inspection and lubrication of the vari-
ous parts take place in the following assembly sequence:
1. Correct assembly of all parts included in the previously
lubricated ALEDER maintenance kits.
2. Insert the blow-out proof shaft 02 into the actuator hous-
ing 01 from below. Mount the cam 05 in the correct posi-
tion and install the cam spacer ring 06.
3. Insert the shaft washer 08, shaft snap ring 09 and insert
indicator in the top part of the pinion.
4. Install the two pistons and make sure that they click in po-
sition at the same time when you turn the blow-out proof
shaft 02 clockwise for normally closed actuators and anti-
clockwise for normally open actuators.
5. Install the end caps 16 and tighten the screws 17 evenly.
6. The open and closed position must be correctly aligned
with the stated position in the top part of the pinion, then
mount the cover.
NOTICE
▶After installation, operate the actuator a few times.
10 Assembly

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11 Changing the rotational direction
11 Changing the rotational direction
Before installing the actuator, it must be ensured that the information on the actuator product label corresponds to the rota-
tional direction achieved at the end. Before continuing with assembly, the assembly instructions must be selected according to
the design (ST, STR, LF or LFR).
Note: The following instructions relate to standard assembly of the octi-cam (without the option of a lock kit).
ST version:
Assembly of the shaft:
TOP
TOP
1
CLOSE PISTON OPEN PISTON
OCTI-CAM
SHAFT
TOP VIEW
(Diagonal)
(Parallel)
SHAFT
CONNECTION
1. Install the octi-cam in the correct position.
Assembly of the pistons:
TOP
TOP
90°
40° - 45°
5°
AA
2 3 4 5
2. Install the shaft square socket connection on a properly secured coupling.
3. Make sure that the octi-cam is in the correct position (figure 3). The groove on the shaft must be parallel to the housing.
4. To install the ST version (clockwise closing), turn the housing clockwise by approx. 40–45° when viewed from above (figure
4).
5. Simultaneously insert the two pistons into the housing and press them in until the pistons are engaged. Then turn the hous-
ing anticlockwise when viewed from above until the stroke is completed.
6. In the case of two fully adjusted pistons, make sure that the rotation achieved in relation to the housing axis is 5° over 0° or
0.5° over 0°, depending on the actuator type, and that dimension A on both sides is the same as in figure 5.