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IMAT 4thGU-E
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 ref-
erence. It is important that the use and maintenance of the ac-
tuator 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).
installed in potentially explosive zones, make sure
that the inter-nal parts of the actuator do not come
into contact with the external atmosphere.
•
Referring to the Machinery Directive 2006/46/EC, the
actuators can be classified as "PARTLY COMPLETED
MACHINERY" (see the DECLARATION OF INCORPO-
RATION). Therefore the actuator can not put into serv-
ice 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 clas-
sified according to the ATEX Directive 2014/34/EU
(see ac-tuator label and safety instructions). The use
of the actuators in potential explosive atmosphere
zones has to comply with the ATEX classification
indicated on the actuator label and according to the
ATEX safety in-structions.
•
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 pro-
tect 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
(disassembly 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.
TH
GENERATION Upgrade Series actuators are
•
The 4
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 en-
Moreover,
for
actuators
sure that the national and local safety laws and regula-
tions are observed.
•
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 po-
sition, 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
temperature. The maximum particle size contained into
the operating 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
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, 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°
actuators (180° rotation).
Stroke adjustment at 0°(closed pistons): +15°max/ - 5°.
Stroke adjustment at 90°, 120°, 135° and 180°(open
pistons): +5°/-15°max. For actuator AT045U 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 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.
GB
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