Air Torque PT Series Operating and maintenance manual

IMAT PT-E ISSUE: 02/18GB
INSTALLATION, MAINTENANCE AND OPERATING INSTRUCTION
MANUAL FOR POWER TECHNOLOGY “PT”
For POWER TECHNOLOGY ACTUATORS Model/Type:
PT045→PT800
Double acting “D” and Spring return “S”
90°→180° Stroke

2
CONTENTS
1) GENERAL pag. 3
2) WARNING pag. 3
3) WORKING CONDITIONS AND TECHNICAL DATA pag. 3
4) OPERATING FUNCTION AND DIRECTION OF ROTATION pag. 4
5) INSTALLATION INSTRUCTIONS pag. 4
6) MAINTENANCE INSTRUCTIONS pag. 5
7) STORAGE INSTRUCTIONS pag.11
8) LIFTING AND HANDLING pag.11
IMAT PT- E
GB

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IMAT PT- E GB
1) GENERAL
This instruction manual contains important information regard-
ing the installation, operation, maintenance and storage for
POWER TECHNOLOGY rack and pinion pneumatic actuators.
Please read these instructions carefully and keep them for fu-
ture reference. It is important that the use and maintenance of
the actuator is made only by properly trained personnel.
 2) WARNING
• Do not operate the actuator using inflammable, oxidiz-
ing, corrosive, explosive or unstable gases or liquids
(use only not dangerous fluids - group 2 according
to 2014/68/EU directive). Moreover, for actuators
installed in potentially explosive zones, make sure that
the internal parts of the actuator do not come into
contact with the external atmosphere.
•Referring to the Machinery Directive 2006/42/EC, the
actuators can be classified as “PARTLY COMPLETED
MACHINERY” (see the DECLARATION OF INCORPO-
RATION). Therefore the actuator can not put into service
until the machinery and/or the system, where the actua-
tor is incorporated, will be declared in compliance with
the requirements of the Directive 2006/42/EC.
• POWER TECHNOLOGY actuators are designed, pro-
duced and classified according to the ATEX
Directive 2014/34/EU (see actuator label and safety
instructions). The use of the actuators in potential
explosive atmosphere zones has to comply with the
ATEX classification indi-cated on the actuator label
and according to the ATEX safety instructions.
• The use, the installation and the maintenance of the POW-
ER TECHNOLOGY actuators must be made by adequately
trained personnel. For the use, installation and mainte-
nance of POWER TECHNOLOGY actuators it is recom-
mended to comply to the safety notice and to use proper
equipment to protect health and prevent accidents.
• It is important that the actuator is used only within the
working limits indicated in the technical specifications.
• Do not operate the actuator over temperature limits: this
could damage internal and external components (disas-
sembly of spring return actuator may become dangerous).
• Do not operate the actuator over pressure limits: this
could damage internal parts as well as cause damage
to the housing and end-caps.
• Do not use the actuator in corrosive environments with
incorrect protection: this could damage the internal and
external parts.
• Do not disassemble individual spring cartridges, this
may result in personal injury. If maintenance to springs
is necessary, send them to AIR TORQUE.
• Close and disconnect all air supply lines and make sure
that air connections are vented during maintenance and
installation on valve.
• Do not disassemble the actuator or remove end caps
while the actuator is pressurized.
• The POWER TECHNOLOGY actuators are designed to
be used only on valves.
• Before installing the actuator onto the valve make sure
that the rotation direction and the position indicator are
in the correct position.
• If the actuator is incorporated in a system or used within
safety devices or circuits, the customer shall ensure that
the national and local safety laws and regulations are ob-
served.
• In case the actuator is installed on a valve with a
gearbox for emergency manual operation, make sure
that the stroke of the gearbox does not exceed the
stroke allowed by the actuator. Caution: make sure
that the gearbox stroke, both in closed and in opened
position, is properly adjusted.
If you exceed the stroke allowed by the actuator with
the manual operation of the gearbox, you can cause
severe damage to the adjustment screws, to the
pistons and to the actuator itself.
3) WORKING CONDITIONS AND TECHNICAL DATA
• Operating media:
Dry or lubricated air or inert gases, provided that they are
compatible with the actuator internal parts and lubricant.
The operating media must have a dew point equal to
-20°C (-4°F) or at least 10°C below the ambient tempera-
ture. The maximum particle size contained into the operat-
ing media must not exceed 30 μm.
• Supply pressure:
The maximum supply pressure is 8 bar (116 Psi).
For double acting and spring return actuators the working
pressure is from 2.5 bar (36 Psi) to 8 bar (116 Psi).
• Operating Temperature:
⇒“Standard” actuators from -40°C (-40°F) to +80°C
(+176°F)
⇒Actuators for high temperature “HT” from -15°C (+5°F)
to +150°C (+300°F)
⇒Actuators for extreme low temperature “LLT” from
-55°C (-67°F) to + 80°C (+176°F)
Caution: for low and high temperature service, special
grease and special components are required. Please con-
tact AIR TORQUE. Working at high or low temperature
can affect the life and the output torque of the actuator.
• Operating Time (see Technical Data Sheet):
Caution: the operating time depends on several factors
such as supply pressure, supply system capacity (pipe
diameter, flow capacity of pneumatic accessories), valve
type, valve torque and figures, applied safety factor, cycle
frequency, temperature, etc.
•Rotation and stroke adjustment (see technical data sheet):
For standard actuators (90° rotation), 120° actuators (120°
rotation), 135° actuators (135° rotation) and 180° actua-
tors (180° rotation).
Stroke adjustment at 0°(closed pistons): +5°/- 5°. Stroke
adjustment at 90°, 120°, 135° and 180°(open pistons):
+5°/-5°. For actuator PT045 the stroke adjustment at 90°
(open pistons) is available only on request.
• Lubrication:
The actuators are factory lubricated for the
life of the actuator in normal working condi-
tions. The standard lubricant type GSTD is suit-
able for use from -40°C (-40°F) to +80°C (+176°F).
For extreme low temperature (LLT) and high temperature
(HT) service, special grease is required: please contact
Air Torque. Actuators with protection level “L” need spe-
cial grease (type GA-LT).
• Construction:
Rack and pinion actuator design suitable for both indoor
or outdoor installations.
• Protection and Corrosion resistance:
All the actuators are supplied with corrosion protection for
normal environments. For corrosion resistance of the dif-
ferent types of protection see technical data sheet.

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IMAT PT- E
Before installing the actuator in aggressive environment,
ensure that the selected protection level is suitable.
•Actuator designation and marking (see technical data
sheets):
The actuator type, size, operating pressure, output torque,
direction of rotation, spring action, operating temperature
and type of connections/interfaces are determined by
designation.
• All POWER TECHNOLOGY actuators are supplied with
an identification l abel s howing t he s erial n umber a nd a ll
necessary information on use, service, operation and prod-
uct designation. Where applicable, the label indicates the
classification according to ATEX Directive 2014/34/EU.
4) OPERATING FUNCTION AND DIRECTION OF ROTATION
The actuator is a pneumatic device for remote opera-
tion of industrial valves. The operation (90°,120°,135° or
180° rotation) may be activated by different methods:
• Direct mounting of solenoid valve (5/2 for double acting,
3/2 for spring return) to pressure connections 2 and 4,
connected to supply and control lines
• Screwed connection (to pressure connections 2 and 4)
with air lines from separate control cabinet.
The standard rotation (when port 4 is pressurized or for
spring action) is clockwise to close. When port 2 is pres-
surized, counter-clockwise rotation is obtained.
POWER TECHNOLOGY actuators can be supplied with
different types of assembly/rotation direction depending
on the type of required operation and/or installation, see
technical data sheets.
5) ACTUATOR INSTALLATION INSTRUCTIONS
The POWER TECHNOLOGY actuator is a pneumatic device
for the remote operation of industrial valves. The actuator will
operate through 90°,120°,135° and 180° rotation permitting
the opening and closing of many types of valves up to 180°
rotation. All the necessary technical information to install the
actuator correctly and safely onto a valve i.e.:
Dimensions, Output torque, Supply pressure, Air volume,
Stroke adjustment, Operating time, Operating tempera-
ture, Direction of rotation and Weight is stated clearly on the
Actuator label, in the catalogue and technical data sheets.
Please read all technical information before proceeding with
the actuator installation.
 5.1) Important Safety Notice!
• For safety reasons, the actuator must not be pressurized
at any time during installation as injury may result.
• The utmost cleanliness is required during air supply con-
nection to the actuator i.e. the connecting pipe thread,
fittings and seals must be clean and dirt-free.
• When fitting accessories onto the actuators, assemble
them in such a way that the emergency control of the
solenoid valve and the top of the drive shaft are eas-
ily accessible, should emergency manual operations be
required.
• Before fitting onto the valve, make sure that the actua-
tor/valve are correctly orientated, depending upon which
direction of rotation is required.
GB
Air supplied to port 2 forces the pistons towards the actuator
end caps. A counter-clockwise rotation is achieved.
Exhaust air exits from Port 4.
Air supplied to Port 4 forces the pistons inward.
A clockwise rotation is achieved. Exhaust air exits from Port 2.
DOUBLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE “ST”) TOP VIEW
SINGLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE “ST”) TOP VIEW
Air supplied to Port “2” forces the pistons toward the actuator
end caps, compressing the springs.
A counter-clockwise rotation is achieved. Exhaust air exits
from Port 4.
The loss of air pressure (air or electric failure) at Port “2” allows
the springs to force the pistons inward.
A clockwise rotation is achieved.
Exhaust air exits from Port 2.

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GB
IMAT PT- E
• For spring return actuators, avoid that dangerous and/
or corrosive substances in the working environment en-
ter into the external chambers by using adequate filters
and/or solenoid valves.
• Remove plugs from actuator air connections during in-
stallation and operation. Protect the air connections of
actuators not being used immediately.
5.2) Interfaces for actuator controls and connections, Fig. A:
Fig. A Fig. B Fig. C
5.3) Assembly of accessories: solenoid valves and switchboxes,
figure B:
Fig. A Fig. B Fig. C
• Solenoid valve mounting:
Before mounting a solenoid valve, ensure that the actuator is
in its normal position (closed position) with pistons inwards.
For standard rotation type “ST” (clockwise to close) as-
sembly: the groove on the drive shaft or on the position
indicator 2 must be horizontal to the longitudinal axis of
the actuator in closed position.
Fit the solenoid valve 4 onto the actuator 3 using the pro-
vided screws (max. tightening torque see table).
• Switchbox mounting:
Fit the switchbox and bracket 1 onto the actuator 3 using
four provided screws (max. tightening torque see table).
5.4) Assembly of Valve Fig. C:
Before installing the actuator onto a valve, verify that the
maximum transmissible torque for available ISO Flange and
drive shaft connection is not exceeded according to ISO
5211 considering: the maximum actuator output torque,
the maximum air supply pressure and the maximum valve
torque. Before proceeding with the assembly of the actua-
tor onto the valve, be sure that the actuator operates in
the desired direction of rotation when pressurised and both
actuator / valve are in the correct position.
Fig. A Fig. B Fig. C
Important: when using a spring return actuator for a fail
safe operation, ensure that when air or electricity failure oc-
curs the direction of rotation is correct for your application.
Fit the actuator 3 onto the valve 5. It is possible to assem-
ble the valve onto the actuator in two ways:
• Direct-mount: fit the stem of the valve 5 directly into the fe-
male connection of the actuator 3 and bolt together through
the valve ISO pad (max. tightening torque see table).
• Bracket-mount: mounting with a bracket 6 and coupling 7,
the bracket is bolted to the actuator / valve to join them to-
gether and the coupling is used to connect the actuator out-
put drive to the valve stem (max. tightening torque see table).
6) MAINTENANCE INSTRUCTION
With the information given below, AIR TORQUE provides
the end user with all the required information necessary
for maintenance. Under normal conditions, the actuator re-
quires only periodic observation to ensure proper operation.
Maintenance (disassembly, maintenance and rebuilding) of
AIR TORQUE actuators is allowed only to AIR TORQUE
personnel or properly instructed personnel. In case of con-
troversy the product guarantee will expire! Spare kits for
maintenace are available to replace all seals and bearings
(soft parts indicated into the table), that may be necessary
between 200.000 and 1.000.000 cycles depending on oper-
ating and environmental conditions and actuator size.
Position indicator
VDI/VDE 3845
Pressure connections
VDI/VDE 3845
Ancillaries attachment
ISO 5211/ DIN 3337
Valve actuator attachment
Nm
Tightening torque table for
DRY (A) and LUBRICATED (B)
condition.
M… A B
M5 5 ÷ 6 4 ÷ 5
M6 10 ÷ 11 7 ÷ 8
M8 23 ÷ 25 18 ÷ 20
M10 48 ÷ 52 34 ÷ 36
M12 82 ÷ 86 60 ÷ 64
M14 132 ÷ 138 96 ÷ 102
M16 200 ÷ 210 150 ÷ 160
M20 390 ÷ 410 290 ÷ 310
M24 675 ÷ 705 500 ÷ 530
M30 (A.. 50) 620 ÷ 650 470 ÷ 500
M30 (A.. 70) 1340 ÷ 1400 1000 ÷ 1050

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GB IMAT PT- E
Ex 1
Ex 2
Ød
Ex 1
Ex 2
Ød
6.1) DRAWING WITH ITEMIZED COMPONENTS AND RECOMMENDED SPARE PARTS

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GB
PART N° UNIT Q.TY NOTE PART DESCRIPTION
01 1 NA for PT045 OCTI-CAM (Stop arrangement)
02 2 NA for PT045 STOP CAP SCREW
03 2 NA for PT045 WASHER
04 2 NA for PT045 NUT (Stop screw)
05* 2 BEARING (Piston back)
06* 1 BEARING (Pinion top)
07* 1 BEARING (Pinion bottom)
08* 2 1 Pcs. for model PT045 THRUST BEARING (Pinion)
09* 2 NA for PT800 PLUG
09.1* 2 O-RING (For PT800)
10 1 THRUST WASHER (Pinion)
11* 2 NA for PT045 “O” RING (Stop screw)
12 2 NA for PT045 and rotation > 90° PISTON GUIDE
13 8/12/16 (A) CAP SCREW (End cap)
14* 2 “O” RING (End cap)
15* 2 BEARING (Piston head)
16* 2 “O” RING (Piston)
1 min. 5/max.12 for PT100 ÷ PT800 SPRING (Cartridge)
17.1 max. 2
for PT045
max. 4
for PT050 N
NA for PT100 ÷ PT800 SPRING (For PT045 ÷ PT050 N)
17.2 NA for PT100 ÷ PT800 SPRING (For PT045 ÷ PT050 N)
17.3 NA for PT100 ÷ PT800 SPRING (For PT045 ÷ PT050 N)
18 1 SPRING CLIP (Pinion)
19 2 NA for PT045 POSITION INDICATOR
20* 1 “O” RING (Pinion bottom)
21* 1 “O” RING (Pinion top)
30 2 END CAP
39 1 for PT045 ÷ PT300 CAP SCREW (Indicator)
39.1 1 for PT350 ÷ PT800 CAP SCREW (Indicator)
39.2 1 for PT350 ÷ PT800 WASHER (Indicator)
40 2 PISTON
41 1 ACTUATOR IDENTIFICATION LABEL
42 2 END CAP LABEL
43 1SPIGOT (Only on request)
50 1 BODY
60 1 INTEGRAL DRIVE SHAFT
IMAT PT- E
* Suggested SPARE PARTS for maintenance
Notes: (A) 12 Pcs. for models PT700 / PT750. 16 Pcs. for models PT800

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GB IMAT PT- E
6.2) DISASSEMBLY
When disassembly of actuator is required for maintenance,
firstly remove the actuator from the valve. Before performing
any disassembly operations it is important to verify that the
actuator is not pressurised.
Always use caution and double check that the ports 2 and
4 are vented and are free from any accessory and/or device.
When the actuator is a spring return unit, make sure that the
actuator is in the failed position and with pistons completely
inwards before disassembling.
A) Removal of position indicator (Part N° 19), figure 01:
• Remove cap screw (39,
39.1, 39.2) if fitted.
• Lift position indicator
(19) off shaft, it may be
necessary to pry gently
with a screwdriver.
B) Removal of stop cap screws (Part N° 02), figure 02:
• Remove both stop cap screws
together with nut (04) and
washer (03).
• Remove stop screw o-rings
(11) and discard if replacing all
soft parts.
C) End caps disassembly (Part N° 30), figure 03:
• End caps disassembly for spring return actuators (disas-
semble one end cap at a time).
Unscrew the end cap bolts (13) in the sequence shown
in figure 03, until the end-caps are free from springs force
(for PT045 and PT050 N 20-23 turns of the screws, for
PT100 to PT800 4-5 turns of the screws).
Then completely unscrew the screws and remove the
end-cap and the springs.
If there is still force on the end-caps after unscrewing as
indicated above, this may indicate that spring cartridge is
damaged or that the pistons are not completely closed,
so any further disassembly should be discontinued. Fur-
ther disassembly of the end caps may result in injury.
• End caps disassembly for double acting actuators (dis-
assemble one end cap at a time)
Unscrew the end cap bolts (13) in the sequence shown
in figure 03, until the screws are completely unscrewed
and the end caps are free.
• Remove the o-rings (14) using a screwdriver. Discard
soft parts if replacing.
• Only for actuators with adjustment 50% or 100%, re-
move the nut 04R, the washers 03R and o-rings 11R
and discard soft parts if replacing.
D) Pistons disassembly (Part N° 40), figure 04:
• Holding the body (50) in a vice or similar device, rotate
the drive shaft (60) until the pistons (40) are released.
Caution: air pressure should not be used to remove the
pistons from the body.
• Remove o-rings (16) using a screwdriver. Remove the
piston back (05) and piston head (15) bearings.
• Discard bearings when replacing all soft components.
E) Drive shaft disassembly (Part N° 60), figure 05:
• Remove the spring clip (18) using snap-ring pliers or
screwdriver for spiral rings, remove the thrust washer
(10) and the external thrust bearing (08). Apply down-
ward force to top of drive shaft (60), until it is partially
out of the bottom of the body when it is possible to re-
move the internal thrust bearing (08) and the octi-cam
(01), then push the pinion (60) completely out of the
body. If pinion is not easily removed, gently tap the top
of the shaft with a plastic hammer.
• Remove top (06) and bottom (07) pinion bearings and
top (20) and bottom (21) pinion o-rings.
• Discard bearings (06) and (07), internal and external
thrust washer (08) and o-rings (20) and (21) if replacing
the soft components.
All the components disassembled and not replaced will
have to be cleaned and inspected for wear and before
reassembly, if necessary, also replace the plugs (09).

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6.3) ASSEMBLY:
Prior to assembly, ensure that:
• all the components are perfectly clean and in good con-
dition.
• the spare parts and the lubricant used are suitable
for the operating temperature of the actuator (see Air
Torque technical data sheets).
• Note: The lubricants suitable for the various operat-
ing temperatures (Standard, HT and LLT actuators) are
available in Air Torque.
Only for “standard” actuators, for temperature from
-40°C (-40°F) to +80°C (+176°F), it is possible to use
lubricant Dow Corning type Molykote®G-2003.
A) Drive shaft assembly (Part N° 60), figures 06, 07 and
07A:
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings onto
the shaft.
• Grease the outside sur-
face of the drive shaft
as shown in figure 06.
• Insert partially the drive
shaft (60) in the body
(50), install octi-cam
(01) in the correct posi-
tion as shown in figures
07 and 07A, related to the bottom and top of the drive
shaft and the rotation of the actuator when energised.
Install the internal thrust
bearing (08). Insert com-
pletely the drive shaft in
the body.
• Fit external thrust bearing
(08), thrust washer (10)
and then external spring
clip (18) using snap ring
pliers or screwdriver for
spiral rings.
B) Pistons assembly (Part N° 40), figures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and pis-
ton head (15) bearings.
• Grease the internal surface of the body (50) and the pis-
ton (40) rack teeth.
• Insert the female connection of the drive shaft (60) in a
properly fixed coupling.
• Ensure that the octi-cam is in the right position as shown
in figure 09.
• For standard rotation assembly type “ST” (clockwise
to close), rotate the body (50) about 40-45° clockwise
from top view, as shown in figure 10.
• Insert and press the two pistons (40) simultaneously
inside the body (50) until the pistons are engaged, then
rotate the body anticlockwise from top view until the
stroke is completed.
•Ensure that with pistons completely closed, the rota-
tion obtained referred to the axis of the body is about
over 0° for models PT050 N→PT800 (0,5° over 0° for
PT045) and that the dimension “A” on both sides is the
same as shown in figure 11.
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IMAT PT- E

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GB IMAT PT- E
C) End cap (Part N° 30) assembly, figures 12, 13 and 14:
• Assemble one end cap at a time.
• Lubricate the body.
• For spring return actuators, insert the springs in each end
cap according to the desired configuration, as shown in
figure 12 and related tables. For models PT100→PT800
insert spring cartridges as shown in figure 13.
SPRING SET CONFIGURATION
PT045B configuration:
PT050B configuration:
• Fit end cap o-ring seal (14) into the groove on both end
caps.
• Fit end caps onto the body (50), verifying that the o-ring
remains in the groove.
• Only for actuators with 50% or 100% stroke adjust-
ment, ensure that the adjustment screws 221G/222G
are completely screwed into the end-cap.
• Insert the cap screws (13) and tighten each only par-
tially. Complete tightening by making 1-2 turns for each
screw in the sequence shown in figure 14 until tight-
ening is completed. See the table for screw tightening
torque.
D) Assembly of stop cap screws (Part 02) and stroke
adjustment for models PT050 N→PT800, figures 15
and 16:
• Insert on both stop screws (02) the nut (04), the washer
(03) and the o-ring (11).
• Fit the stop cap screws (02) in the body.
• Stroke adjustment for actuators with standard type “ST”
rotation / assembly (clockwise to close).
Stroke adjustment in close position: with the actuator in
close position 0°, screw or unscrew the right (from top
view) stop cap screw until the desired stop position is
achieved.
Then tighten the stop adjustment nut (04) to lock it in
place.
Stroke adjustment in open position: with the actuator in
open position 90°, screw or unscrew the left (from top
view) stop cap screw until the desired stop position is
achieved. Then tighten the stop adjustment nut (04) to
lock it in place.
For spring return actuators, it could be necessary to
make rotation tests to verify the correct stroke adjust-
ment in open position.
Spring Set
S1-1
S1-2
S2-2
S2-3
S3-3
Side B
PT045B
Spring type
1 (green)
1 (green)
2 (red)
2 (red)
3 (black)
Side A
PT045B
Spring type
1 (green)
2 (red)
2 (red)
3 (black)
3 (black)
Spring
Set
S1
S2
S3
S4
S5
S6
S7
S8
PT050B
Internal
Spring type
1(green)
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
PT050B
External
Spring type
------------
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
PT050B
Internal
Spring type
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
1 (green)
PT050B
External
Spring type
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
3 (red)
Side B Side A
Progetto1_Layout 1 12/04/13 18.36 Pagina 1
Spring Set
S1-1
S1-2
S2-2
S2-3
S3-3
Side B
PT045B
Spring type
1 (green)
1 (green)
2 (red)
2 (red)
3 (black)
Side A
PT045B
Spring type
1 (green)
2 (red)
2 (red)
3 (black)
3 (black)
Spring
Set
S1
S2
S3
S4
S5
S6
S7
S8
PT050B
Internal
Spring type
1(green)
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
PT050B
External
Spring type
------------
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
PT050B
Internal
Spring type
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
1 (green)
PT050B
External
Spring type
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
3 (red)
Side B Side A
Progetto1_Layout 1 12/04/13 18.36 Pagina 1

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IMAT PT- E
• Only for actuators with adjustment 50% or 100%, fit
on end-cap adjustment screws 221G/222G the o-rings
11R, the washers 03R and the nuts 04R.
To adjust the stroke in open position: with the actuator
in partially or totally open position, screw or unscrew
the end-cap adjustment screw 221G/222G until the de-
sired position is achieved. It is important that the two
end-cap adjustment screws are both in contact with the
pistons. Then lock the nuts 04R.
E) Assembly of graduated ring and position indicator
(Part N° 19), figures 17:
• Insert the indicator (19) making sure that it indicates the
correct actuator position.
• Screw the indicator screw (39, 39.1, 39.2) if assembled.
7) STORAGE INSTRUCTIONS
If the actuator is not for immediate use, the following
precaution must be taken for storage:
• Store the actuator in a clean and dry environment and at
temperature between -20°C (-4°F) and +40°C (+104°F).
• It is recommended that the actuator be stored in its orig-
inal box.
• Do not remove the plastic plugs on air supply ports
8) LIFTING and HANDLING
It is recommended to lift the actuators with proper, ad-
equate and permitted systems in relation to the actuator
weight and by following the ruling laws in terms of safety
and health protection. The weight of the actuators is in-
dicated on the Air Torque catalogue and on the related
technical data-sheets.
During the lifting and the handling of the actuators, it is
recommended to avoid clashes and/or accidental falls in
order to avoid irreparable damages to the actuators and
to compromise the functionality.
Contact Air Torque for any information and technical
data-sheets.

Head office Works:
AIR TORQUE S.p.A.
società uninominale
Head Offices: Via dei Livelli Sopra, 11
Factory: Via dei Livelli Sopra, 8
24060 COSTA DI MEZZATE (BG) - Italy
Tel.:[phone] - Fax: [phone]
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