omal automation AGO DA2880 User manual
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
“DA” DOUBLE ACTING VERSION
“SR” SPRING RETURN VERSION
INSTRUCTION MANUAL
SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Rif. UMA800081C - 06/22
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EN - 2
OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
FOREWORD
The present User’s Installation and Maintenance Manual has been edited in conformity with:
2006/42/EC Directive “Machinery”;
2014/34/EU Directive “Equipment and protection systems designated to be used in potentially explosive atmospheres” (ATEX).
The following standards/technical specications also apply:
EN 15714-3:2009 Industrial valves: Actuators – Pneumatic part-turn actuators for industrial valves.
IEC 61508:2010-1/7 Functional safety of electrical/electronic/programmable electronic safety-related systems. Part 1:7
UNI CEN/TS 764-6:2005 Pressure equipment Part 6: Operating instructions structure and contents.
INDEX:
Pag.
1. GENERAL FEATURES 3
2. WORKING CONDITIONS 3
3. OPERATION AND ROTATION DIRECTION 7
4. SAFETY INFORMATION 8
5. INSTALLATION INSTRUCTIONS 8
6. MATERIALS AND THEIR DURABILITY 23
7. MAINTENANCE 31
8. SPECIAL VERSIONS 31
9. STORAGE 31
10. TROUBLESHOOTING 32
11. DISPOSAL OF PRODUCTS AT THE END OF THEIR LIFE CYCLE 32
12. DECLARATION OF CONFORMITY 33
Environmentally friendly: under the green leaf icon you can nd the instructions for a correct
and environmentally friendly handling of the product.
OMAL S.p.A. reserves the right to change, at any time, the features and data of its own products, to better improve the quality and
the duration of said products.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
1) GENERAL FEATURES
OMAL S.p.A. produces a wide range of pneumatic actuators, with “Scotch yoke” mechanism, for valve drive and remote control. Such
actuators are available both in the double acting “DA” version and in the Spring Return “SR” version.
The use of an actuator is based on the principle of opening and closing the valve connected to it, without manual operations by means
of levers or hand-wheels, but through an electro-pneumatic remote command.
The “Scotch yoke” mechanism is a mechanical system designed to transform the linear force into a torsion-type force.
OMAL S.p.A. uses this system, when producing its actuators, to transfer the linear force of the pistons to the movement of the valve
shaft.
This system provides a long life for the actuator and the best performance, with the least energy consumption.
The OMAL S.p.A. Scotch yoke system has a torque curve that makes the maximum torque available right at the breakaway of the
valve, the initial opening moment.
2) OPERATION CONDITIONS
a. Structure.
The OMAL S.p.A. actuators can be used both for indoor and outdoor installations. The technical characteristics such as: the type,
the size, the maximum operating pressure, the torque supplied, the maximum operating temperature, the ange type, the serial and
production number, are laser engraved on the actuator body (see drawing on page 6).
b. Supply uid
The operating media should be dry and ltered compressed air not necessarily lubricated or inert gases compatible with internal ac-
tuator parts and lubricants.
The operating medium shall have a dew point equal to – 20 °C or, to be at least, 10 °C below the ambient temperature (ISO 8573-1,
Class 3). The maximum particle size shall not exceed 40 μm (ISO 8573-1, Class 5).
c. Operation pressure.
The maximum operating pressure is 8,4 bar (120 psi), 7 bar (100 psi) for the DA8000.
The nominal operating pressure is that which can be found on the plate or on the actuator directly.
d. Operating temperature.
The operating temperature can be found on the plate and can vary according to the types of seals that are being used. The OMAL
S.p.A. actuators work within a temperature range that goes from –20°C (-4°F) to 80°C (176°F); there are also versions that can be
used with low or high temperature (paragraph 8).
e. Stroke of the actuators.
The OMAL S.p.A. actuators are produced for a standard stroke of a 91° rotation; an adjustment that reduces the stroke by 10° (in the
closed valve position) is available upon request.
f. Opening and closing rates.
The cycle rate depends on different factors such as the supply pressure, the capacity, the connection sizes, the characteristics of the
solenoid valves, the room temperature, the valve torque and its characteristics. The rates in the following charts relate to the actuator
only and have been recorded with the help of the limit switches located on the actuator shaft. The rates are therefore exactly what is
required by the actuator for a 90° rotation, counting from the instant that the movement begins until the end of the stroke.
Below you will nd the safety instructions, the minimum information for storage / warehousing, the installation, the commissioning, the
maintenance and the instructions for disposal of products at the end of their life cycle for the following pneumatic actuators:
A) DOUBLE ACTING PNEUMATIC ACTUATORE SERIES DA2880-DA3840-DA5760-DA8000
B) SPRING RETURN PNEUMATIC ACTUATORE SERIES SR1440-SR1920-SR2880-SR4000
Where provided, the actuators are marked in accordance with the applicable EX regulations.
OMAL S.p.A. disclaims any liability for damage caused by improper use, even if partial, respect to the information contained in this
manual.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Note: different working conditions such as: air pressure, the sizes of pipe connection, of the lters and of the solenoid valves, may
change the maneuver timing.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Note: different working conditions such as: air pressure, size of tting connections, lters and solenoid valves can change the opera-
ting times.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
g. Lubrication.
The actuators are lubricated, for normal working conditions, in the company. For maintenance or reassembly operations, OMAL S.p.A.
recommends the use of a lubricant such as TECNOLUBE SYNTHY POLYMER 402 or equivalent.
h. Functional Safety
The OMAL S.p.A. pneumatic actuators are also suitable for installations which require high level of functional reliability, up to SIL3, in
compliance with the IEC 61508 standard.
i. Wear protection of internal components
The cylinder is electrolysis nickel plated internally, in order to reduce roughness of the surface
to a minimum value and is protected with an oxidation treatment which is 20μm thick. The guides of the pistons are made of acetalic
resin. The use of steel bushes on the Scotch yoke system reduce backlash and confer very low friction sliding during operation.
j. External protection
The actuators are suitable both for indoors and outdoors. The aluminum body and the caps are protected against corrosion by an
oxidation treatment which is 20 µm thick; the shaft and cap screws are made of stainless steel.
This generally allows to meet the C4 safety class, for applications that require it, according to the standard EN 15714-3 section 4.4.3.
For applications in environments with aggressive type atmospheres that require a higher protection level than C4, the actuator must
be protected with a suitable varnishing treatment.
k. Marking and classication
The bodies of the OMAL S.p.A. actuators are marked, by means of laser engraving or a label, with the manufacturer’s logo and ad-
dress, the code or the serial number, the size, the output torque, the working pressure and the maximum working temperature and
the production date.
Marking of versions where the temperature is different from the standard one:
low temperature version: T. min.= -50°C T. max=60°C
high temperature version: T. min.= -20°C T. max=150°C
1) Logo and address of the manufacturer
2) Product code including the series“DA” the no-
minal torque“XXXX” and their type of ange “FXX”
3) Production date code“XX/XX”
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
3) OPERATION AND ROTATION DIRECTION
a. Double acting.
The actuator pistons are mounted as shown in the gure below. This provides the maximum torque at the beginning of valve opening,
for valves that close in a clockwise direction.
Port 2 is in connection with the side chambers of the cylinder, by pressurizing such connection of a standard double-acting actuator
DA, the shaft rotates counter-clockwise to open, while port 4 is connected with the intermediate chamber and when pressurized, the
drive shaft rotates clockwise to close.
b. Spring return - normally closed
The pistons of the SR type actuators are mounted as shown in the gure below.
Caution. Install a lter on connection 2, in order to prevent the access of dust or dirt inside the actuator chambers, during the spring
action.
The remote control functionality of the actuators must be done through a direct connection with solenoid valves and the EN15714-3 -
NAMUR (VDI / VDE 3845) standard interface or with pipes screwed on the ports marked with the numbers 2 and 4.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
TYPICAL CONNECTION LAYOUT
Actuator positioning and rotation direction
The positioning and the rotation direction of the actuator, to ensure a maximum opening torque, must be in conformity with the stan-
dard EN 15714-3 point 4.5.4 and the valve coupling according to the EN ISO 5211standard.
4) SAFETY INFORMATION
- The actuator must be used within the specied pressure limits; operation beyond these limits may damage the internal parts of the
actuator.
- The actuator operation out of the range of temperatures indicated could damage its internal or external parts.
- Using the actuator, without the due external protection, may damage it in corrosive environments.
- Before the installation, repair or maintenance be sure that the actuator is not pressurized, disconnect the air lines and verify that they
have vented.
- Do not remove the caps when the actuator is installed online or while it’s still pressurized.
- Do not remove the spring cap, this operation may be carried out by qualied personnel only; such operation could cause personal
injuries.
- Before installing the actuator on the valve be sure that the rotation of one is in phase with the rotation of the other and that the shaft
slit position is correct.
- Before installing the actuated valve, carry out a few dry cycles in order to check the proper tting between valve and actuator.
- Carry out the installation in compliance with the national local regulations and laws.
- Before installing a pneumatic actuator bearing the marking in accordance with EX regulations, carefully read the additional
instructions, supplied together with the product, regarding the use in explosive atmospheres.
5) INSTALLATION INSTRUCTIONS
The installation of an actuator allows to open and close a valve, which is installed in a system, without manual operation, by means of
an electric-pneumatic remote control.
The normal sizing of the actuators requires to consider an appropriate safety margin for the breakaway torque which is necessary for
the valve to operate properly. The plant project, physical or chemical characteristics of the uids, special environmental conditions,
may require an increase of the safety factor to be applied to the sizing.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
To lift the actuator without damaging it, see the below image.
Use only belts with 400kg minimum load
Bracing points designed for lifting the
actuator only
Prior to installation verify that valve and actuator comply with the safety standards described above. Utmost cleanliness is required
when connecting the air supply to the actuator. All parts of the plant, reductions, joints, plates, brackets and equipment must be thorou-
ghly cleaned. Before mounting the actuator on the valve be sure that both elements are correctly oriented, depending on the rotation
direction needed.
- Before installation, visually check that the conditions of the actuator are good, since it’s been transported and stored.
- Carefully read the OMAL S.p.A. instructions contained in the cardboard box.
- Verify performance and limits found on the actuator body to see whether if it’s suitable for the application or not.
- Remove the plastic protective covers from the ports and insert whichever lters as pointed out in paragraph 2.
- Prior to mounting the actuator on the valve, clean both from dust and dirt.
- Verify the valve position, closed or open, and the rotation direction.
- Verify the actuator position and the rotation direction based on the valve, especially for the installation of the SR version “normally
closed” and “normally open”.
- The SR versions “normally closed” are always supplied in the closed position.
The SR versions “normally open” are always supplied in the open position.
Assembly of Valve/Actuator:
A) DIRECT INSTALLATION
The direct installation of valve and actuator is the best way in order to avoid backlash between the valve stem and the actuator shaft.
For direct installation, there should be the same standard ange connection both on the valve and on the actuator, and the dimen-
sions of the valve stem should t perfectly with those of the actuator shaft. Before installation, please check that the actuator and the
valve both have ISO anges of the same size, also check that the dimensions of the valve stem and its shape are suitable for direct
mounting: use a reduction if necessary.
Mount the valve stem in the housing on the actuator shaft and bolt the two ISO anges together.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
B) INSTALLATION WITH CONNECTION PLATE
In the cases where a direct installation is not possible, due to small differences between the actuator and valve anges and/or shafts,
it’s possible to carry out the installation with a connection plate for easy positioning and of appropriate sizing.
C) ASSEMBLY WITH A BRACKET AND CONNECTION JOINT
Where, for technical installation reasons and due the system, a certain distance is required between the valve and actuator, or the
anges and the valve stem are not standard, or where direct installation is not possible, the right solution is given by a bracket and
a connecting joint. The bracket is a steel bridge that allows to connect the valve on one side and the appropriate connection for the
actuator on the opposite side, leaving the space for a steel joint. The joint allows the transmission of the torque between the actuator
and the valve and is essential in the case of stem drives with keys.
Choose a joint that is appropriate for the ange and the right connections for bolting the actuator on the valve without backlash.
WARNING
The OMAL S.p.A. actuators, with their drainage system in the ange connection area, have been designed especially for valve direct
mounting.
This system prevents any damage to the actuator due to possible uid dripping from the valve stem.
Tightening torque of the screws
SIZE TORQUE Nm
M10 45-50
M12 80-85
M14 125-135
M16 190-200
M20 370-390
Stroke adjustment
Both actuator versions, spring return and double acting, can have a stroke adjustment.
See the below instructions:
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Actuators DA3840 - DA5760 - DA8000
FOREWORD
The adjustment of the actuator is possible in both open and closed positions.
By operating on the adjusting center block (A) the opening can be adjusted, while the closing can be adjusted by turning the two
screws (B)
ATTENTION
Any type of adjustment must always be carried out when the actuator chambers are not pressurized.
The chambers can be pressurized, to check the adjustment, only when the center block (A) and the side screws (B) are correctly
tightened.
The actuator is provided with a standard adjustment of 0° closed, 90° open.
The actuator is to be lined up with the pipeline
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Central chamber supply hole
Shaft
External chambers supply hole
1) Make sure that both chambers are pressurized
2) Unscrew the protection cap completely
3) Rotate the screw (2) in a clockwise direction if you want to increase the opening angle, in a counter-clockwise direction if you want
to decrease such angle
4) Put cap back on and tighten it (1) making sure that also the screws and the side nuts are tightened correctly
5) Power up the actuator and operate it
6) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
Open valve adjustment
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Shaft
Internal chamber (central) supply hole
External chambers supply hole
Closed valve adjustment
1) Make sure that both chambers are not pressurized
2) Loosen the lock nuts (3 and 4)
3) Rotate the screws (5-6) in a clockwise direction if you want to decrease the closing angle, in a counter-clockwise direction if you
want to increase such angle (both screws must be rotated of the same amount)
4) Tighten the nuts (3-4)
5) Pressurize the internal chamber with the least pressure enough for the movement of the internal pistons (it can be seen precisely
from the shaft rotation)
6) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
7) Keep the actuator internal chamber pressurized.
8) Loosen the lock nuts (3-4)
9) Verify that both screws (5-6) lean on the internal piston, they will be hard to rotate, if that is not so, tighten the loose screw
(clockwise) until it touches the piston
10) Tighten the nuts (3-4)
11) Power up the actuator and operate it
12) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
ACTUATOR DA 2880
The adjustment of the actuator is possible in both open and closed positions.
It can be adjusted by turning the side screws (A-B)
ATTENTION
Any type of adjustment must always be carried out when the actuator chambers are not pressurized
The chambers can be pressurized, to check the adjustment, only when the side screws are correctly tightened.
The actuator is provided with a standard adjustment of 0° closed, 90° open.
The actuator is to be lined up with the pipeline.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
1) Make sure that both chambers are not pressurized
2) Loosen the lock nut (1)
3) Rotate the screw (2) clockwise to decrease the opening angle, in a counter clockwise direction to increase such angle
4) Tighten the lock nut
5) Power up the actuator and operate it
6) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
Shaft
Central chamber supply hole
External chamber supply hole
Open valve adjustment
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Shaft
Central chamber supply hole
External chamber supply hole
1) Make sure that both chambers are not pressurized
2) Loosen the lock nut (3)
3) Rotate the screw (4) clockwise to decrease the closing angle, in a counter clockwise direction to increase such angle
4) Tighten the lock nut (3)
5) Power up the actuator and operate it
6) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
Closed valve adjustment
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
ACTUATORS SR1920 - SR2880 - SR4000
FOREWORD
The adjustment of the actuator is possible in both open and closed positions.
By operating on the adjusting center block (A) the closing can be adjusted, while the opening can be adjusted by turning the two
screws (B).
ATTENTION
The adjustment and checking must always be carried with low pressure (the least pressure enough for the movement)
The chambers can be pressurized, to check the adjustment, only when the center block (A) and the side screws (B) are correctly
tightened.
The actuator is provided with a standard adjustment of 0° closed, 90° open.
The actuator is to be lined up with the pipeline
NOTE: WARNING: NEVER UNCREW THE “COMPRESSED SPRINGS” COVER SCREWS DANGER FOR THE OPERATOR
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Internal chamber (central) supply hole
OPEN VALVE ADJUSTMENT
1) Make sure that both chambers are not pressurized
2) Loosen the lock nuts(3-4)
3) Rotate the screws (5-6) in a clockwise direction if you want to decrease the opening angle, in a counter-clockwise direction if you
want to increase such angle (both screws must be rotated of the same amount)
4) Tighten the lock nuts (3-4)
5) Pressurize the internal chamber with the least pressure enough for the movement of the internal pistons (it can be seen precisely
from the shaft rotation)
6) Verify that the adjustment obtained is the desired one (open valve), otherwise repeat the operations from step 1.
7) Keep the actuator internal chamber pressurized,
8) Loosen the lock nuts(3-4)
9) Verify that both screws (5-6) lean on the internal piston, they will be hard to rotate, if that is not so, tighten the loose screw
(clockwise) until it touches the piston.
10) Tighten the lock nuts(3-4)
11) Power up the actuator with the nominal pressure and operate it.
12) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
NOTE: WARNING: NEVER UNCREW THE “COMPRESSED SPRINGS” COVER SCREWS DANGER FOR THE OPERATOR.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
Internal chamber (central) supply hole
Shaft
CLOSED VALVE ADJUSTMENT
1) Pressurize the internal chamber (central) with the least pressure enough for the movement of the internal pistons (it can be noticed
from the outside due to the partial rotation of the shaft)
2) Unscrew the safety cap completely (1)
3) Rotate the screw (2) in a clockwise direction if you want to increase the closing angle, in a counter-clockwise direction if you want
to decrease such angle.
4) Reset the cap
5) Remove the pressure from the internal chamber
6) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
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OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
ACTUATOR SR1440
FOREWORD
The adjustment of the actuator is possible in both open and closed positions.
By turning the side grub screw (A) the closing can be adjusted, while the opening can be adjusted by turning the side screw.
ATTENTION
The adjustment and checking must always be carried with low pressure (the least pressure enough for the movement)
The chambers can be pressurized, to check the adjustment, only when the side screws are correctly tightened.
The actuator is provided with a standard adjustment of 0° closed, 90° open.
The actuator is to be lined up with the pipeline.
NOTE: WARNING: NEVER UNCREW THE “COMPRESSED SPRINGS” COVER SCREWS DANGER FOR THE OPERATOR.
This manual suits for next models
3
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