Air Torque AT1001U/PT1000B User manual

IMAT AT1001U-PT1000 B - E ISSUE: 02/18 GB
INSTALLATION, MAINTENANCE AND OPERATING
INSTRUCTION MANUAL
For AIR TORQUE ACTUATOR Model/Type:
“AT1001U/PT1000 B” and “AT1001U R/PT1000B R”
Double acting “D” and Spring return “S”
“0°” “90°” 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 AT1001U-PT1000 B - E
GB

3
IMAT AT1001U-PT1000 B - E GB
1) GENERAL
This instruction manual contains important information re-
garding the installation, operation, maintenance and storage
for AIR TORQUE rack and pinion pneumatic actuators.
Please read these instructions carefully and keep them for
future 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, oxidizing,
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 at-
mosphere.
• Referring to the Machinery Directive 2006/42/EC, the
actuators can be classified as “PARTLY COMPLETED
MACHINERY” (see the DECLARATION OF INCORPORA-
TION). Therefore the actuator can not put into service
until the machinery and/or the system, where the actuator
is incorporated, will be declared in compliance with the
requirements of the Directive 2006/42/EC.
• Air Torque actuators are designed, produced and
classified according to the ATEX Directive 2014/34/EU
(see actuator label and safety instructions).
The use of the actuators in potential explosive atmos-
phere zones has to comply with the ATEX classification
indicated on the actuator label and according to the ATEX
safety instructions.
• The use, the installation and the maintenance of the Air
Torque actuators must be made by adequately trained
personnel. For the use, installation and maintenance of
Air Torque actuators it is recommended 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 4th GENERATION Upgrade Series 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 al-
lowed 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 actua-
tor 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 temperature. The maxi-
mum particle size contained into the operating media must
not exceed 30 μm.
• Supply pressure:
The maximum supply pressure is 8 bar (116 Psi) only for
AT1001U/PT1000 B spring return type and AT1001U R/
PT1000B R double acting and spring return. While for type
AT1001U/PT1000 B double acting the maximum supply
pressure is 7 bar (101,5 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 contact 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, tem-
perature, etc.
• Rotation and stroke adjustment (see technical data sheet):
For standard actuator 90° rotation.
Stroke adjustment at 0° (closed pistons): +5° / – 5°. Stroke
adjustment at 90° (open pistons): +5° / – 5°.
• Lubrication:
The actuators are factory lubricated for the life of the actua-
tor in normal working conditions. The standard lubricant type
GSTD is suitable 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.
• 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 different
types of protection see technical data sheet. Before installing
the actuator in aggressive environment, ensure that the se-
lected 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 des-
ignation.


4
IMAT AT1001U-PT1000 B - E
• All AIR TORQUE actuators are supplied with an identi-
fication label showing the serial number and all neces-
sary information on use, service, operation and product
designation. Where applicable, the label indicates the clas-
sification according to ATEX Directive 2014/34/EU.
4) OPERATING FUNCTION AND DIRECTION OF ROTATION
The actuator is a pneumatic device for remote operation of
industrial valves. The operation (90° 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.
Air Torque 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.
Double Acting operation function (standard rotation type
“ST”) TOP View.
Single Acting operation function (standard rotation type
“ST”) TOP View.
5) ACTUATOR INSTALLATION INSTRUCTIONS
The Air Torque actuator is a pneumatic device for the remote
operation of industrial valves. The actuator will operate through
90° rotation permitting the opening and closing of many types
of valves up to 90° 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 temperature,
Direction of rotation and Weight is stated clearly on the Actua-
tor label, in the catalogue and technical data sheets. Please
read all technical information before proceeding with the ac-
tuator 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 so-
lenoid valve and the top of the drive shaft are easily acces-
sible, should emergency manual operations be required.
• Before fitting onto the valve, make sure that the actuator/
valve are correctly orientated, depending upon which di-
rection of rotation is required.
• For spring return actuators, avoid that dangerous and/
or corrosive substances in the working environment enter
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:
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.
Air supplied to Port “2” forces the pistons toward the ac-
tuator 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.
Fig. A
IMAT AT1001U-PT1000 B - E
GB

Position indicator
Stellungsanzeige
Indicateur de position
Indicador de posición
Indicatore di posizione
EN 15714-3
Ancillaries attachment
Zubehˆr-anschlu
Raccordement des accessories
Acopliamento accesorios superiores
Connessione accessori
EN 15714-3
Pressure connections
Druckanschlu
Connections à la pression
Conexion de presión
Connessione alimentazione
ISO 5211
Valve actuator attachment
Schnittstelle Amatur
Raccordement robinet actionneur
Acpèlamiento valvula
Connessione valvola - attuatore

5
IMAT AT1001U-PT1000 B - E
5.3) Assembly of accessories: Solenoid valves and Switch-
boxes, Fig. B:
• Solenoid valve mounting:
Before mounting a solenoid valve, ensure that the actua-
tor is in its normal position (closed position) with pistons
inwards. For standard rotation type “ST” (clockwise to
close) assembly: 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 actuator 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.
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 assemble
the valve onto the actuator in two ways:
• Direct-mount: fit the stem of the valve 5 directly into the
female 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 together and the coupling is used to connect the
actuator output 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 actua-
tor requires 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 controversy 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 operating and environmental condi-
tions and actuator size.
6.1) Drawing with itemized components and recommended
spare parts
Fig. B
1
2
3
4
Fig. C
6
3
5
7
IMAT AT1001U-PT1000 B - E GB
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

6
PART
N°
UNIT
Q.TY PART DESCRIPTION
17 min. 5
max.12 SPRING (Cartridge)
18 1 SPRING CLIP (Pinion)
19.0 1 GRADUATED RING
19.1 1 POSITION INDICATOR
19.5 1 TOP ADAPTOR
19.6 2 HEX. SOCKET SCREW (Top Adaptor)
20* 1 “O” RING (Pinion bottom)
21* 1 “O” RING (Pinion top)
30 2 RIGHT AND LEFT END CAP
39 1 CAP SCREW (Indicator)
39A 1 WASHER CAP SCREW (Indicator)
40 2 PISTON
41 1 ACTUATOR IDENTIFICATION LABEL
42 2 END CAP LABEL
43 1 SPIGOT (Only on request)
50 1 BODY
60 1 DRIVE SHAFT
IMAT AT1001U-PT1000 B - E
GB
PART
N°
UNIT
Q.TY PART DESCRIPTION
01 1 OCTI-CAM (Stop arrangement)
02 2 ANTI-BLOWOUT STOP SCREW
02.1 2
SPRING CLIP (Anti-Blowout stop screw) optional
03 2 WASHER
04 2 NUT (Stop screw)
05* 4 BEARING (Piston back)
06* 1 BEARING (Pinion top)
07* 1 BEARING (Pinion bottom)
08* 2 THRUST BEARING (Pinion)
09.1* 2 O-RING (Ext. chamber air connection)
10 1 THRUST WASHER (Pinion)
11* 2 “O” RING (Stop screw)
12 2 PISTON GUIDE
13 16 CAP SCREW (End cap)
13.1 16 WASHER (Cap Screw)
14* 2 “O” RING (End cap)
15* 2 BEARING (Piston head)
16* 2 “O” RING (Piston)
40F
32
24 11E* 03E 04E
23
11F*
03F
04F
40F
23 11F* 03F 04F
32
24
11E*
03E
04E
20*
07*
60
19.6
06*
21*
50
01 08*
09.1*
41
09.1*
05*
05*
40
17
17
02 11*
03
04
02.1
30
13A
13
42
02F
11*
12
02
39
19.0
18
10
08*
19.1
16* 15* 14* 30 13A 13
14* 15* 16* 40 12
19.5

7
ONLY FOR MODEL AT1001U R /PT1000B R
and AT1001U FA /PT1000B FA
02F 2 SCREW (Plug)
03E 2 WASHER (Plug)
03F 2 WASHER (Piston Threaded)
04E 2 NUT (End Cap Threaded)
04F 4 NUT (Piston Threaded)
11E* 2 "O" RING (End Cap Threaded)
11F* 2 “O” RING (Piston Threaded)
23 2 REW (INTERNAL Stroke Adj.)
24 2 SCREW (EXTERNAL Stroke Adj.)
32 2 RIGHT AND LEFT END CAP (Threaded)
40F 2 PISTON (Threaded)
*Suggested SPARE PARTS for maintenance
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 and graduated ring
(Part N° 19,19.0,19.1), Fig. 01:
• Remove cap screw (39) if fitted.
• Lift position indicator (19 or 19.1) off shaft, it may be nec-
essary to pry gently with a screwdriver.
• Lift, if necessary, the graduated ring (19.0) off the body, it
may be necessary to pry gently with a screwdriver.
Fig. 01
39
19
B) Positioning/disassembly of stop screws (Part N° 02),
Fig. 02 and 06 (N.A. for model AT1001U R/PT1000R
and AT1001U FA/PT1000 B FA):
• Using snap-ring pliers remove the optional spring clip
(02.1), both nuts (04) the washer (03) and the O-rings (11)
and discard if replacing all soft parts.
• Unscrew the stop screws until they are at least 80 mm
outside the body.
• If necessary after the drive shaft is disassembled, the stop
screws may be totally removed by screwing completely
into the body.
• For model AT1001U R/PT1000B R and AT1001U FA/
PT1000 B FA if necessary, the screw plugs 02F may be
removed only for “O” ring 11 replacement.
Fig. 02
C) End Caps disassembly (Part N° 30 for model AT1001U/
PT1000B, Part N° 32 for model AT1001U R/PT1000B
R and AT1001U FA/PT1000 B FA), Fig. 03:
• End caps disassembly for spring return actuators (disas-
semble one end cap at a time).
Unscrew the end cap bolts (End cap 13) in the sequence
shown in the figure 03. Caution: when disassembling a
spring return actuator, the end caps (30 or 32) should be
loose after unscrewing end cap bolts (13) 4-5 turns. Un-
screw the ands caps bolts by a step of one turn sequence
for all the screw. If there is still force on the end caps after
4-5 turns of the end cap bolts, this may indicate a dam-
aged spring cartridge and any further disassembly should
be discontinued. Further disassembly of the end caps
may result in injury.
• End caps disassembly for double acting actuators (disas-
semble 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.
• For spring return actuators, always remove spring car-
tridge.
• Remove the o-rings (14) using a screwdriver. Discard soft
parts if replacing.
• Remove O-rings external chamber connections (09.1)
and discard if replacing all soft components.
• Only for Model AT1001U/PT1000B R and AT1001U FA/
PT1000 B FA remove the nuts 04E, washers 03E, “O”
rings 11E and screws 24E. Discard bearings when re-
placing all soft components.
• Only for actuators with adjustment 50% or 100%, remove
the nut 04R, the washers 03R and o-rings 11R and dis-
card soft parts if replacing.
Fig. 03
3
8
2
5
7
6
13
1
4
IMAT AT1001U-PT1000 B - E GB
02

8
6.3) Assembly:
Prior to assembly, ensure that:
•
all the components are perfectly clean and in good condition.
• 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 operating tem-
peratures (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) Positioning/assembly of stop screws (Part N° 02), Fig.
07 (N.A. for model AT1001U R/PT1000B R):
• Screw the stop screws from inside the body until they are
at least 80 mm outside the body.
• Insert on both the stop cap screw (02), the nut (04), the
washer (03), the O-ring (11) and the spring clip (02.1).
Fig. 07
B) Drive shaft assembly (Part N° 60), Fig. 08, 09 and 09A:
• Install top and bottom pinion bearings (06) and (07) and top
and bottom pinion O-rings (20) and (21) onto the shaft.
• Grease the outside surface of the drive shaft on top and
bottom as shown in figure 08.
• Insert partially the drive shaft (60) in the body (50), install
octi–cam (01 only for model AT1001U/PT1000 B) in the
correct position as shown in figures 09 and 09A related
to the bottom and top of the drive shaft and the rota-
tion of the actuator when energised and install internal
thrust bearing (08). Insert completely 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.
IMAT AT1001U-PT1000 B - E
GB
Fig. 06
D) Pistons disassembly (Part N° 40 or 40F), Fig. 04:
• Fixing the drive shaft (60) in a troper hub or similar de-
vice, rotate the body (50) until the pistons (40 or 40F) are
released. Caution: Air pressure should not be used to re-
move the pistons from the body.
• Remove piston ‘O’ rings (16) using a small screwdriver;
remove the piston back (05) and piston head (15) bearings.
• Discard bearings when replacing all soft components.
• Only for Model AT1001U R/PT1000B R and AT1001U
FA/PT1000 B FA remove the nuts 04F, washers 03F, “O”
rings 11F and screws 23. Discard bearings when replac-
ing all soft components.
Fig. 04
E) Pinion shaft disassembling (Part N° 60), Fig. 05:
• If necessary, remove the graduated ring (19.0) with a screw-
driver, 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 downward force
to top of drive shaft (60), until it is partially out of the bottom
of the body when it is possible to remove the internal thrust
bearing (08) and the octi-cam (01 only for model AT1001U/
PT1000 B), then rotate the body by 90° till the drive shaft
is in an horizontal position, than push the pinion (60) com-
pletely out of the body. If pinion is not easily removed, gen-
tly tap the top of the shaft with a plastic hammer.
• Remove top and bottom pinion bearings (06) and (07) and
top and bottom pinion O-rings (21) and (22).
• Discard bearings (06) and (07), internal and external thrust
washer (08) and O-rings (21) and (22) if replacing all 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 (09.1).
Fig. 05

9
IMAT AT1001U-PT1000 B - E GB
Fig. 08
Fig. 09 Fig. 09 A
C) Pistons assembly (Part N° 40 or 40F), Fig. 10,11,12,13
14 and 15:
• Only for Model AT1001U R/PT1000B R and AT1001U
FA/PT1000 B FA install screws 23, O-rings 11F, washers
03F and nuts 04F.
• Grease and install piston O-rings (16), the Piston skirt
(05) and piston head (15) bearings.
• Grease the internal surface of the body (50) and the pis-
ton (40) rack teeth.
• Hold the body (50) in a horizontal position by inserting
the top of the shaft into a vice or the bottom of the shaft
connection into a male drive fitted in a vice as shown in
figure 11.
• Ensure that the octi-cam is in the right position as shown
in figure 12.
• For standard rotation assembly (clockwise to close) ro-
tate the body (50) about 40-45° counter-clockwise from
bottom view or clockwise from top view depending on
which way the shaft has been linked as shown in figure
13.
• Press the two pistons (40) simultaneously inside the
body (50) until the pistons are engaged and rotate the
body clockwise from bottom view or counter clockwise
from top view until the stroke is completed as shown in
figure 14.
• Ensure that with pistons completely closed, the rotation
obtained referred to the axis of the body is about over 0°
and that the dimension “A” on both sides is the same as
shown in figure 15.
• Only for Model AT1001U R/PT1000B R and AT1001U
FA/PT1000 B FA, adjust screws 23, until the desired
stop.
position at 0° is achieved. Then tighten the stop adjust-
ment nuts (04F) to lock it in place.
Fig. 11
Fig. 12
Fig. 13
40° - 45°
Fig. 10
15
16
05

10
IMAT AT1001U-PT1000 B - E
GB
Fig. 14
Air connection
Fig. 15
4°
D) End cap (Part N° 30 for model AT1001U/PT1000 B,
Part N° 32 for model AT1001U R/PT1000B R) and spring
cartridge (17) assembly, Fig. 16, 17,18 and 19:
• Assemble one end cap at a time.
• Lubricate the inside surface of end caps and piston ”O”
rings 16.
• Lubricate the body.
• For spring return actuators, insert the springs in each
end cap according to the desired configuration, as
shown in figure 18 and related tables (referring to the
total number of springs). Insert spring cartridge (17) as
shown in figure 17. Springs housing of pistons should be
oriented as shown on figure 17.
• Fit end cap O-ring seal (14) into the groove in the end
cap, on both end caps.
• Fit O-rings external chamber connections (09.1) on both
sides.
• Ensure that the body is perpendicular to the pistons,
than 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 the washer cap screw
(13A) and tighten each only partially. Complete tighten-
ing by making 1-2 turns for each screw in the sequence
shown in figure 19 until tightening is completed. See the
table for screw tightening torque.
Fig. 16
Fig. 17
4°
Fig. 18
Side ASide B
Fig. 19
3
8
2
5
613
4
7
1
Side B
Side A
14
A
A
=
=

11
IMAT AT1001U-PT1000 B - E GB
E) Stroke adjustment for standard rotation actuator
(Clockwise to close) Fig. 20:
• Stroke adjustment for actuators with standard type “ST”
rotation / assembly (clockwise to close):
Stroke adjustment in close position: 0° (Close) position
stroke adjustment with actuator in close position, screw
or unscrew the right (from top view) stop cap screw (02)
until the desired stop position is achieved. Then tighten
the stop adjustment nut (04) to lock it in place. Stroke
adjustment in open position: 90° (open) position stroke
adjustment with actuator in open position, screw or un-
screw the left (from top view) stop cap screw (02) until the
desired stop position is achieved, then tighten the stop
adjustment nut (04) and lock it in place. For spring return
actuators, it could be necessary to make rotation tests to
verify the correct stroke adjustment in open position.
• Only for Model AT1001U R/PT1000B R, with actuator
in open position adjust screws 24, until the desired stop
position at 90° is achieved. Then tighten the stop adjust-
ment nuts (04E) to lock it in place. For spring return actua-
tors, it could be necessary to make rotation tests to verify
the correct stroke adjustment in open position.
• 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 desired 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.
Fig. 20
Fig. 21
F) Assembly of graduated ring and position indicator
(Part N° 19.0 and 19.1), Fig. 22 and 23:
• Fix the graduated ring (19.0) to the body.
• If necessary, correctly position the “Top Adaptor” (19.5)
and lock it with the proper screws (19.6).
• Insert the indicator (19.1) making sure that it indicates the
correct actuator position.
• Screw the indicator screw (39) if assembled.
Fig. 22
19.5
19.6
Fig. 23
39
19
EX1
mm
EX2
mm
EX3
mm
Ø d1
mm
Ø d2
mm
24 60 14 100 32
7) STORAGE INSTRUCTIONS
If the actuator is not for immediate use, the following precau-
tion 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 origi-
nal box.
• Do not remove the plastic plugs on air supply ports.
8) LIFTING and HANDLING
It is recommended to lift the actuators with proper, adequate
and permitted systems in relation to the actuator weight and
by following the ruling laws in terms of safety and health pro-
tection. The weight of the actuators is indicated on the Air
Torque catalogue and on the related technical data-sheets.
During the lifting and the handling of the actuators, it is rec-
ommended to avoid clashes and/or accidental falls in order
to avoid irreparable damages to the actuators and to com-
promise the functionality.
Contact Air Torque for any information and technical data-
sheets.
02

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]
[email protected] - www.airtorque.it
This manual is property of AIR TORQUE S.p.a. - Costa di Mezzate - Italy and all rights of use and reproduction are reserved - Subject change without notice