Air Torque AT-HD Series

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Manual HD EN

0906e

HEAVY-DUTY

Scotch-Yoke Pneumatic Actuators

MANUAL

Modifications reserved. Date 03.2017.

No guarantee for accuracy.

Older data sheets are invalid.

INSTALLATION, MAINTENANCE AND OPERATING INSTRUCTION MANUAL FOR AT-HD series ACTUATORS

CONTENTS:

1. GENERAL

2. WARNING

3. WORKING CONDITIONS AND TECHNICAL DATA

4. OPERATING FUNCTION AND DIRECTION OF ROTATION

5. INSTALLATION INSTRUCTIONS

6. MAINTENANCE INSTRUCTIONS

7. DISASSEMBLING INSTRUCTIONS

8. ASSEMBLING INSTRUCTIONS

9. ADJUSTMENT INSTRUCTIONS

10. PERIODIC CHECKS

11. LIFTING AND HANDLING

12. ACTUATOR INSPECTIONS (TO BE CARRIED OUT ON ACTUATOR RECEIPT)

13. STORAGE INSTRUCTIONS

14. ACTUATOR ASSEMBLY AND PARTS LIST

1. GENERAL

Important information about the installation, functioning, maintenance and storage for AIR TORQUE scotch- yoke actuators AT-HD series are included in this manual.

Please read these instructions carefully and keep them for future reference. It’s important that the maintenance and the usage of AIR TORQUE products is carried out only by trained and

qualiﬁ ed personnel.

Into the consideration of the all possible variations on the conﬁ guration of the product due to the different services and working conditions, some speciﬁ c indications may not be menti-

oned in this manual, in case of doubt contact Air Torque for any additional information needed.

2. WARNING

• Do not operate the actuator with oxidizing, corrosive or unstable gases or liquids (only Group 2 ﬂ uids according to 97/23/EC). The AT-HD series actuator power cylinder can be

operated with ﬂ uids of the Group 1 according to PED 97/23/EC only if the power cylinder is speciﬁ cally produced to be operated with this ﬂ uids and the actuator data-plate clearly

states the compatibility with them, provided that the ﬂ uids of Group 1 are compatible with internal parts.

• For actuators installed in areas of potentially explosive atmosphere (ATEX), make sure that during operations the internal parts of the actuator do not come in contact with

the atmosphere itself.

• In case the actuator cylinder is pressurized with not inert gas or media, avoid any contact of the pressure media during decompressing with surrounding atmosphere.

• Referring to Machine Directive 2006/42/CE, actuators are classiﬁ ed as “partly machinery” (see declaration of incorporation). Therefore the actuator can not to be put into

service until the machinery and/or the ﬁ nal system, where the actuator is incorporated, will be declared in compliance with the requirements of the Directive.

• AIR TORQUE actuators AT-HD series are designed, produced and classiﬁ ed according to the Atex Directive 94/9/EC (see actuator’s marking and safety instructions). Before

using the actuators in potentially explosive atmosphere areas, check the actuator compliance with the ATEX classiﬁ cation required. See the actuator marking and the ATEX

safety instructions.

• The electrical connections of the accessories that may be required to operate the actuator, are under the responsibility of the user; check these components compliance

with the Zone classiﬁ cation where they shall be installed.

• The use, the installation and the maintenance of AIR TORQUE actuators AT-HD series must be carried out by adequately trained personnel. For the use, installation and main-

tenance of AIR TORQUE actuators AT-HD series it is recommended to comply with the safety notice and to use proper protective equipments to prevent incidents and opera-

te in healthy conditions.

• It is important that the actuator is used only within the working limits marked on the actuator data plate and speciﬁ ed in the technical speciﬁ cations.

• Do not operate the actuator over the temperature limits: internal and external components could be damaged.

• Do not operate the actuator over the pressure limits: internal and external components could be damaged.

• Do not use the actuator in corrosive environments with inadequate protection: internal and external parts could be damaged.

• Do not disassemble the Spring Module and do not try to modify or rework the spring housing, this may result in serious injury (see the label over the Spring Module). In case of

spring maintenance needed, send the actuator Spring Module back to AIR TORQUE.

• Before performing any operation on the actuator, shut off the electric/pneumatic/hydraulic supply of the actuator and exhaust the pressure from the actuator cylinder.

• Before installing the actuator onto the valve make sure that the rotation direction and the position indicator (if available) 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 respected.

3. WORKING CONDITIONS AND TECHNICAL DATA

• Power Operating media:

Dry or lubricated air, inert gas, inert ﬂ uid, hydraulic oil. In case of pressure medium different than Group 2 ﬂ uids according to 97/23/EC, contact Air Torque.

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.

Make sure that the operating media is compatible with the actuator internal parts and with the lubricant.

• Supply Pressure (see the actuator marking):

• for actuators supplied with low pressure media: up to 10 bar (145 Psi) depending on actuator model (Scotch Yoke size compared to the Power Module size).

• for actuators supplied with high pressure media is:

• for actuators supplied with gas, up to 103 bar (1500 Psi) depending on actuator model (Scotch Yoke size compared to the Power Module size).

• for actuators supplied with oil or inert liquid, up to 207 bar (3000 Psi) depending on actuator model (Scotch Yoke size compared to the Power Module size).

• Operating temperature (see the actuator marking):

==> Standard actuators “S” from -40°C (-40°F) to +80°C (+176°F)

==> High temperature actuators “H” from -15°C (+5°F) to +150°C (+300°F)

==> Extremely low temperature actuators “L” from -60°C (-76°F) to +80°C (+176°F)

Caution: for low and high temperature service, special components and greases 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 the technical data sheet).

Caution: The operating time depends on several factors such as supply pressure, supply system capacity (pipe diameter, ﬂ ow capacity of pneumatic accessories), valve type,

valve torque and ﬁ gures, applied safety factor, cycle frequency, temperature, etc.