AMG-PESCH SAD 10 User manual

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam -Riese - Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
Contents
1.0 Introduction
1.1 Application area
1.2 Requirements for the usage acc. to regulations
1.3 Safety instructions for user
1.4 Labelling of the actuators
1.5 Certification acc. to ATEX (2014/34/EU)
1.6 Transport
1.7 Storage
2.0 Installation and commissioning
2.1 Air connection type SAD/SAF (standard version)
2.2 Assembly actuator- control valve
2.3 Mounting actuator - positioner or sensor slot
2.4 Assembly pneumatic actuator -valve
2.5 Commissioning
3.0 Design and function
3.1 Type SAD (double-acting)
3.2 Type SAF (single-acting, with spring-return)
3.3 Direction of rotation
3.4 Parts list
4.0 Disassembly and assembly of the actuators
4.1 Lubrication grease and quantities
4.2 Type SAD
4.3 Type SAF
4.4 Reversal of the direction of rotation
4.5 Functional-testing of the actuators
5.0 Period of maintenance and inspection
6.0 Liability and warranty
7.0 Technical data
1.0 Introduction
This installation and maintenance instruction contains very important indications, to assemble, to
maintain and operate correctly and securely the actuator.
Respecting those guidelines will help you to avoid danger, to reduce repair charges and downtime and
will also enhance the reliability and durability of the actuators.
The installation and maintenance instruction has to be read and applied by every person, who is in
charge to work with the actuators.
The installation and maintenance instruction has to be disposal in every time for the working personal
and for the employees, who are in charge to maintain and repair the actuators.
Keep one copy of the installation and maintenance instruction always in the operating area of the
actuators.
Before starting any assembly- or maintenance working actions, you have to read the installation and
maintenance instruction completely.
In case of doubt please contact AMG-Pesch.
Any technical changes and additions of description / instruction are reserved.
Before any installation, commissioning and maintenance of the actuators, this
installation and maintenance instruction has to be read and the including safety
instructions have to be respected.
SAD/SAF 90 / 2011 / EN / 01 Page 1/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese - Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
1.1 Application area
This installation and maintenance instruction is valid for AMG double piston rotary actuators in the
sizes of 10,15,20,25,30,33,35,40,42,43,45 and 50, in the series SAD (double acting) and SAF(single
acting, with spring return), without stroke limitation.
1.2 Requirements for the usage acc. to regulations
The AMG pneumatic double piston rotary actuators serve the automation of ball valves, plug valves,
butterfly valves and control valves
They are designed to operate the rotary movements of the armature with 90°,
The AMG pneumatic double piston rotary actuators are available in types:
 Type SAD - double – acting.
 Type SAF – single acting, with spring return
For the safe operation and the proper use, the following measures have to be fulfilled:
 Connecting of an control valve on the installation side by a provided control
 Only the dry air as a control medium has to be used. The dew point must be at least 10°C lower
than the lowest operating temperature
By operating with a deviating control medium as the dry air, the manufacturer has to
be absolutely contacted.
 The maximal temperature of the supply air takes 45°C
 The maximal admissible pressure can be accessed from the type plats, however not more than 10
bar
 The mesh size of the control medium is to filter at least with 40 µm (ISO 8573-1, grade 5)
 The actuators are suitable for ambient temperatures from -25° C up to +80°C (special
constructions can deviate from it)
 The shafts of the actuators are not appropriate to support external transversal forces
 Make sure, that no humidity or water could enter into the pneumatic connection of your single
acting drive Type SAF with spring return
 The actuators are unsuitable for taking permanently torsion vibration in the end position
 Do not fall below the minimum switch time of the Actuators, mentioned in table 1.1
Size Min. switching time
10;15;20 0,1 sec
25;30 0,2 sec
33;35 0,4 sec
40;42;43 0,7 sec
45;50 1,0 sec
s
Table 1.1
SAD/SAF 90 / 2011 / EN / 01 Page 2/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese - Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
1.3 Safety instructions for user
Prerequisite for a safety-oriented workflow and a failure-free operation of the actuators is the
knowledge of the basic safety instructions in this installation and maintenance instruction.
Furthermore, the valid instructions and rules concerning accident prevention and the accepted
standards for a safety-conscious and competent workflow have to be respected.
It is not allowed to use the actuators for another aim than defined by the manufacturer. Obvious risks
could be the consequence. Local standards of working and safety rules always have to be respected.
Ensure also compliance with environmental laws and regulations. Working with oils, grease and other
chemical substances needs to respect the safety instructions of the concerned products. Lubricants
have to be disposed competently and in respecting the environment laws. The national standards
have to be respected. While using the Actuators, the user should obligatory consider the following
information concerning the prevention of occupational risks and should always guarantee their
application.
Without respecting the advice contained in these instructions dangers can appear and
lead to the ineffectiveness of the guarantee and liability of AMG - PESCH.
 The actuators are to be pursued only in flawless, functional state
 The security equipment in the enclosure to the limitation of the pressure is to be checked regularly
for her functional ability
 The actuators may be linked up to the control, served and maintained only by skilled and trained
 Repair and servicing work may be exported only by skilled and trained staff considering the
assembly instructions and servicing instructions
 Repair and maintenance should not to be executed in assembled state.
 Prior to disassembly the actuators, the energy supply has to be disconnected and the actuators
should be turned into the safety position
 It is not allowed during the pressure to mount a manual emergency override on the extension of
the shaft
 It is not allowed to use the spanner or similar tools to carry out a manual emergency override by
the single acting actuators (with spring return).
Caution:
Disregard cause risk of injury.
SAD/SAF 90 / 2011 / EN / 01 Page 3/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese - Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
1.4 Labelling of the actuators
Every actuator is identified with a label type as described below
Example of a label type
Elucidation on the type plate
Original / German version Translation
meaning
Exemplary
description Comment
Typ
Type: SAF 20 NC
Design:
Size:
NC:
SAF single-acting
20
spring closes
n:09 Number of springs
Artikel Article: 165811 Clear component marking
Umgeb. Temp. Ambiance
temp. -25 to +80°C Admissible ambiance temperature
Auftrag Order: 521855 Clear order marking
Dichtwerkstoff seal material NBR Designation of the used elastomere
Max. zul. Steuerdruck max. admis.
Pressure 10 bar Maximal admissible pneumatic pressure
Bj. year of
manufacture 2010 year of manufacture of the actuator
Anschuss / SW
Connection/
SW DIN EN
ISO 5211
F07-Y-D/L-17 F07:
Y:
D/L:
17:
flange size
with lead actuator
with an octagonal
SW of the octagonal
Min./max. Federmoment min./max.
spring torque 28,6 / 47,6 Nm
Minimum and maximum back set moment of the springs
in the final situations
1.5 Certification acc. to ATEX (2014/34/EU)
The actuators are applicable in plants, witch they succumb to device group II category 2 acc. to
Directive 2014/34/EU.
The maximal surface temperature depends essentially on the environmental conditions (Marking Tx).
The maximal permitted ambient temperature is indicated on the type plate II 2 GD c IIC Tx
The temperature increase about 10°C due to the self-heating is to be considered.
The temperature of the compressed supply air should not exceed 45°C.
The added electrical / pneumatic equipment must also comply with the explosion protection
requirements of the plant.
Explosive mixtures must not reach to the actuator. For this, the solenoids with exhaust air recirculation
have to be used.
Conversion and repair work should not be executed in an explosive atmosphere.
SAD/SAF 90 / 2011 / EN / 01 Page 4/16
8
Corrosive media should not get into the actuator .

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese - Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
Differing operating conditions annul the certification of the actuators acc. to directive
2014/34/EU. Disregard of this rule constitutes a serious risk for the user and for the plant.
1.6 Transport
The transport may be carried out only by competent staff, which is qualified by knowledge and
experience in the field of transport and able to carry out such a work.
Only use transport and tools, which are undamaged and suitable for the load.
The eye bolts for transport of the actuators (only Size 45, 50) may include in accordance with DIN 580
following maximum last record at an angle of 45 °:
Size 45: 170 kg
Size 50: 240 kg.
The unit weights of the individual actuators without attachments parts are listed in Table 1.2
Size Weight [kg] Weight [kg]
SAD SAF SAD SAF
10 1,8 1,9 35 18,5 26,0
15 2,8 3,5 40 24,0 37,5
20 4,0 5,0 42 33,5 48,5
25 6,0 8,5 43 58,0 86,0
30 12,0 13,5 45 75,0 102,0
33 13,5 18,5 50 126,0 190,0
Size
Table 1.2
If slinging equipment is attached to the actuator, they will be used only to transport the
actuator and not to fix the complete device (armature and actuator).
1.7 Storage
The actuators are to be stored in closed rooms and protected from harmful influences such as dirt or
humidity.
If the package does not show any damage in transit, actuators or devices should only be unpacked
directly before installation.
Unwrapped parts have to be protected from any soiling, humidity and corrosion.
Note that the air connections have to be protected with plugs against entering of
foreign bodies as dirt and dust.
Do not stack unpacked actuators!
By transport or storage damaged actuators can not be used at all.
SAD/SAF 90 / 2011 / EN / 01 Page 5/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese - Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
Shipping screws
This may only be used for transport of the actuator
NOT for transporting of the complete motorized unit.
SAD/SAF 90 / 2011 / EN / 01 Page 6/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese- Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
2.0 Installation and commissioning
AMG-actuators are usually delivered with the necessary accessories, such as control valve and
feedback system. If this is not the case, the following instructions must be observed by fitting and
building the accessories or the armature.
2.1 Air connections type SAD / SAF (standard version)
(Standard version)
AMG double-piston rotary actuators have as standard NAMUR interface for direct mounting of control
valves acc. to VDI / VDE 3845. The air connections are identified with "2" (inner chamber) and with "4"
(external chamber).
2
4
2 4
2.2 Assembly actuator- control valve
For the standard control it is required to combine:
 Type SAD (double acting) and 5/2-way solenoid
 Type SAF (single acting) and 3/2-way- solenoid
Type SAF 3/2-way-solenoid Type SAD 5/2-w ay-solenoid
We recommend the use of control valves with NAMUR connection. Using the NAMUR Encoding
Threaded pin, will ensure that the control valve can be only attached in the prescribed position
(insuring the specified direction of action of the actuator). If the single acting actuators (TYPE SAF)
are not controlled with a Namur-valve, it is essential to ensure that the ventilation of the outer spring
chambers is only done with clean, dry air. It is to ensure that there is no contamination of the actuator
with dust, liquids, vapours or corrosive Gases.
CAUTION: Ensure, while working of single acting actuator TYPE SAF, no corrosive
media can penetrate through the exhaust port - otherwise you risk a spring break.
SAD/SAF 90 / 2011 / EN / 01 Page 7/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese - Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
2.3 Mounting actuator - positioner or sensor slot
AMG double-piston rotary actuators have a standard interface according to VDI / VDE 3845 - fixing
level 1, for fastening feedback units and positioners.
Close the feedback system or the positioner in compliance with the rules and instructions of the
manufacturer, if not happened yet.
CAUTION: Working on electrical installations or equipment must be done only by a
skilled electrician or by instructed persons under the direction and supervision of a
skilled electrician according to the electrical engineering and rules
2.4 Assembly actuator- valve
AMG double-piston rotary actuators have as standard connection for valves according to DIN EN ISO
5211 The connection fittings is usually using console and adapter (coupling) according to DIN EN
15081. The right direction of rotation of the actuator has to be respected. Non-standard structures
have a negative influence on the functioning and life of the valve unit. The actuator has to be
positioned in a way, that in the end positions a full bore of the armature, respectively the reliable
closing of the valve is guaranteed.
CAUTION: In a trial run of the valve unit, the safety regulations as well as the accident
prevention regulations have to be observed.
2.5. Commissioning
Please make sure before the operation that all screws are tightened as prescribed, that the control
pressure, as well as the feedback unit or positioner are connected properly. Check that the pipe
system is properly grounded, so that the electrostatic charging and potential differences could be
avoided.
Make sure that by operating the actuators no dangerous movements are initiated.
Back up any possible clamping and pinching off by respecting the protective devices.
Make sure either that the connected armature properly fitted in the piping or it is in dismounted state.
Additionally you have to make sure that the through bore of the valve is protected with protective caps
before you start a movement.
CAUTION: Take the actuator into operation, only when all the required safety devices
are installed and shall pose no danger from the mounted components.
SAD/SAF 90 / 2011 / EN / 01 Page 8/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
3.0 Design and function
The transfer of shear motion into a rotary motion is done via two opposing pistons with cast racks. The
compressed air flows into one of the two chambers and the piston is in motion. These contribute to the
pinion and thus initiate a rotation
3.1 Type SAD (double-acting)
For ventilation of the inner chamber (port 2) rotates the operating shaft in the counter clockwise
direction (open), for ventilation of the outer chamber (port 4) clockwise (close).
OPEN CLOS E
3 2 Type SAF (single acting, spring return)
For ventilation of the inner chamber (port 2) rotates the operating shaft in the counter clockwise
direction (open) and stretches the springs. The stretched springs causes - when venting the interior
chamber or failure of control pressure – the rotation of the stem clockwise (close). Standard
construction is NC (normally closed).
3.3 Direction of rotation
Looking down at the actuator the direction of rotation is in the standard construction clockwise closing
(NC normally closed). Alternatively, the actuators are supplied with the reverse rotation (NO normally
open).
Standard N
C
Special construction N
O
SAD/SAF 90 / 2011 / EN / 01 Page 9/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
3.4 Parts list
* Parts of sealing set
SAD/SAF 90 / 2011 / EN / 01 Page 10/16
Pos. Qty. Designation Material
1 2 Piston Aluminium
2 4 guide bushings bearing material
3 2 sealing piston ring NBR *
4 4 O-Ring NBR *
5 1 Shaft stainless steel
6 1 O-Ring NBR *
7 1 O-Ring NBR *
8 1 slide bearings bearing material
9 1 slide bearings bearing material
10 1 Body Aluminium anodized
11 2 guide rods stainless steel
12 1 bearing washer bearing material
13 1 washer stainless steel
14 1 Circlip stainless steel
15 2 O-Ring NBR *
16 8 / 12 Cover screws stainless steel
17/18 2 flat cover / spring cover Aluminium coated
19 0-12 Springs (only for SAF 10) spring steel coated
19 0-12 Safety Spring spring steel coated
20 1 position indicator plastic
* Another special material corresponding to the order is possible.

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
4.0 Disassembly and assembly of the actuators
CAUTION!
In principle, work and manipulations are banned when rotary actuators are in the
alternative energy related!
In principle, only work on pressure less actuators!
CAUTION!
Work on actuators may only be performed by trained and qualified staff. The accident
prevention regulations must be observed.
Before disassembly, all attachments on the actuators are to be removed (eg. valves, control valves,
etc.). Before assembly of the actuator, all parts must be cleaned, checked on damage, if necessary,
replaced and all seals have to be renewed.
The bearings, the contact surface in the housing (body), all fittings, seals, spring assemblies and the
tooth system must be lubricated before installation.
A new Circlip (14) should be always used during assembly of the shaft.
CAUTION!
After installation make sure that all cover screws (16) are tightened according to the
instructions and the circlip (14) is properly mounted.
4.1 Lubrication grease and quantities
For the protection of the actuators and to ensure their function, we only recommend the use of original
AMG - grease. The following greases are for use for different applications when operating in dry air:
Temperature range Grease grade
Normal temperature
-25°C to +80°C AMG-Standard grease/Renolit H442
High temperature
-25°C to +100°C
AMG-High temperature grease/Syntheso
Low temperature -40°C to +60°C AMG- Low temperature grease/Isoflex
SAD/SAF 90 / 2011 / EN / 01 Page 11/16
glep1
Topas NB52

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
For deviating operating conditions please take contact with AMG-Pesch.
defined grease quantities
Size Grease
qty. [g] Size Grease qty. [g]
10 25 35 70
15 25 40 80
20 30 42 100
25 35 43 180
30 50 45 240
33 60 50 280
4.2 Type SAD
4.2.1 Disassembly of the actuators type SAD
1. Remove cover screws (16) and detach the two flat cover (17) with seals.
2. Push out by turning the shaft (5) on the external square counter-clockwise two pistons (1) with
guide rods (11) from the housing (10).
3. Mark the position of the pistons for the reassembly.
4. Remove the circlip (14), the washer (13) and the bearing washer (12) and push out the shaft (5)
downward from the housing (10).
4.2.2 Assembly of the actuators type SAD
1. Set up the shaft (5) with the O-rings (6 +7) and the bearings (8 +9) from the bottom in the housing
(10).
2. Equip both pistons (1) with the piston sealing ring (3) and O-rings (4).
3. Slide the guide rods (11) from the top up to the O-ring (4) into the piston (1).
4. Insert the pistons (1) from the left and right side in the housing (10). The guide rods (11) are
pushed through free piston bore on the opposite. Observe the installation position!
5. The pistons (1) should be pushed together until the piston crowns terminate flush with the housing
(10).
6. When the two pistons (1) terminates flush to the housing (10), both pistons (1) will be pressed in
mutual termination inside by further rotation of the shaft (5) clockwise. "CLOSED" position.
7. Adjust the guide rods (11), until they have roughly the same body position on each side.
8. Grease lightly the cover seal (O-ring) (15) and insert it into the groove of the flat cover (17).
9. Doing the cover or cover assembly, note that the longitudinal bore is located within in the housing
of the cover seal (O-ring) (15).
10. Fix both flat covers (17) with the cover screws (16). Tighten the cap screws (16) cross over with
the appropriate torque (see Table 4.2).
11. Check the shaft positioning in position "close". The corners of the inner octagon of the shaft are at
the cross axis of the actuator and the groove in the male square across the actuator. If this is not
the case, press shaft (5) down from the housing (10) and reinstall in the correct position (10).
12. Bring the bearing washer (12) and the washer (13) on the free shaft end and secure with the
circlip(14).
SAD/SAF 90 / 2011 / EN / 01 Page 12/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
4.3 Type SAF
CAUTION!
Disassembly of the spring cover may only be performed when the actuator stands in
the safety position. Risk of Injury!
CAUTION!
The spring cover is under pressure! The springs have to be seen as energy storage
and they can cause injury in case of abuse!
4.3.1 Disassembly of the actuator type SAF
Size 10
These actuators are standard with unfettered (free) springs (19).
1. Loosen all the cover screws (16) evenly until the springs are no longer under tension.
2. Both spring covers (cover) with seals will be removed (18).
3. By turning the shaft (5) on the external square counter-clockwise, the pistons can be pushed out
(1) from the housing (10) with guide rods (11).
4. Mark the position of pistons for the reassembly.
5. Remove the circlip (14), the washer (13) and the bearing washer (12) and press shaft (5)
downward from the housing (10).
Sizes 15-50
These actuators are equipped with bound spring units (19).
1. Loosen uniformly all the cover screws (16). After a few turns the preload of the springs will be
taken in the spring unit.
2. If the spring tension does not subside after the releasing of the cover screws of a way of 4-5 mm,
stop the operation. Maybe the sleeve of the spring unit is damaged. In this case, you solve two
opposing screws completely and replace them with two longer screws that you screw deeply. Now
you can loosen the cover screws evenly until the remaining shorter screws are screwed out
completely. Replace them again by corresponding longer screws and repeat the process until the
springs are completely relaxed and you can safely remove the spring cap.
3. Remove both spring cover (18) with seals.
4. By turning the shaft (5) on the external square counter-clockwise, the pistons could be pushed out
(1) with guide rods (11) from the housing (10).
5. Mark the positions of pistons for the reassembly.
6. Remove the circlip (14), the washer (13) and the bearing washer (12) and press the shaft (5) down
from the housing (10)
4.3.2 Assembly of the actuator type SAF
1. Go with the assembly of the type SAF as you did it first with the double-acting actuator SAD
before. The assembly of the spring cover (18) proceeds in the reverse order as in the
disassembly.
SAD/SAF 90 / 2011 / EN / 01 Page 13/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
2. Put the spring unit (19) into the pockets provided in the piston (1). In the spring configuration it is
to ensure that the arrangement of the spring units has to be in relation to the spring number n
according to the following table 4.1.
n=4 n=5 n=6 n=7 n=8 n=9 n=10 n=11 n=12
Number of springs n
Table 4.1
1. Note that the total number n of the spring unit is the same with the n indicated on the label.
2. Fasten the spring cover (18) by tightening all cover screws (16) evenly crosswise.
3. Complete this work in each case only on the cover side. The screws have to be tightened
according to the torque table (Table 4.2).
Size Thread Torque [Nm]
15; 20 M6 7
25 M8 17
30; 33; 35 M10 35
40; 42; 43 M12 60
50 M20 290
45 M16 145
10 M5 4
Table 4.
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4.4 Reversal of the direction of rotation
If necessary, the rotation direction of the actuator can be changed.
Therefore are the following processing steps essential.
1. Disassembly the Cover and the piston as described in 4.2.1 and 4.3.1
2. To change the direction of rotation, the pistons are to be rotated by 180 ° and, as mentioned in
4.2.2 and 4.3.2, re-assembled.
3. Label the actuator with the correct direction of rotation.
Rotation direc tion NC Rotation direc tion NO
SAD/SAF 90 / 2011 / EN / 01 Page 14/16

AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
4.5 Functional testing of the actuator
Caution! When the actuator is pressurized without an assembled valve there is a risk
that the pinion will be pushed out on the underside of the drive in case of damaged or
the absence of the circlip.
To eliminate this risk to persons and to objects in close proximity, the functional test must be
performed as follows:
1. Separate the steering air line from the actuator
2. If necessary remove the actuator from the valve
3. Secure according to the sketch the Pinion with special tool
The special tool will be
screwed on the underside
of the actuator, placed in
the pattern of the interface
like DIN EN IS O 5211.
4. Pose the actuator with the underside on solid ground
5. Connect the steering air line with the actuator
6. Check the actuator by supplying air
5.0 Period of maintenance and inspection
Basically, are AMG double-piston rotary actuators in the standard lubricated for lifetime and therefore
maintenance-free.
The lifetime is calculated at 500,000 switching cycles. Those are the necessary conditions:
 Professional build-up of the actuator,
 Properly processed control medium
 Normal environmental conditions
 Compliance with the intended use.
The warranty expires when modifications and adjustments work is done on the actuator.
6.0 Liability and warranty
The liability and warranty expires if the use of the actuators is not being done according to the
envisaged basis.
All information and instructions for operating and maintenance are carried out in light of our
experience and know-how in good faith.
The original version of this Installation and maintenance manual has been prepared in German
language and has been examined by us objectively. The translation in the respective country /
SAD/SAF 90 / 2011 / EN / 01 Page 15/16

SAD/SAF 90 / 2011 / EN / 01 Page 16/16
AMG - PESCH GmbH
Installation and Maintenance Instructions
Type SAD/SAF 10, 15, 20, 25, 30, 33, 35, 40,
42, 43, 45, 50
AMG -
PESCH
GmbH
Adam-Riese-Straße 1
D - 50996 Köln
Germany
Phone ++49 - (0) 22 36 - 89 16 - 0
Fax ++49 - (0) 22 36 - 89 16 - 73
E - mail:info@amg - pesch.com
http://www.amg - pesch.com
language of the contract was performed by a certified translation office.
This manual has been compiled with great care. However if you notice some omissions and / or error,
please contact us.
7.0 Technical data
Pivoting range: 0 ° to 90 °
Pressure range: up to
Control medium: air (dry or oily)
Temperature range:
NBR O-rings: -25 ° C to + 80 ° C
Cryogenic NBR O-rings: -40 ° C to + 60 ° C
FKM O-rings: -25 ° C to +100 ° C
Lubrication: Permanent lubrication
When ordering spare parts please indicate the type and size of the rotary actuator plus the item and
the order number (see type label).
AMG - PESCH GmbH
Adam-Riese-Straße 1
50996 Köln
Tel.:[phone] - 89 16 - 0
Fax:[phone] - 89 16 - 73
[email protected]
www.amg-pesch.com
10