Wesa DW User manual

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 1
Http
www.wesa-armaturen.de
Deutschland
PNEUMATIC ACTUATORS
DOUBLE ACTING [DW]
SINGLE ACTING [FR]
These operating instructions contain important information concerning the
installation, function, maintenance and storage of the WESA rotary actuators.
Please read them thoroughly and keep them for any queries. Only instructed
and qualified personnel should service these rotary actuators.
CAUTION!
If the following and warning notes are not followed, hazards could result and
the distributor's warranty could become invalid. The distributor is available
for any queries.

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 2
Http
www.wesa-armaturen.de
Deutschland
CONTENTS
1. Important notice
2. Working conditions and technical data
3. Function and direction of rotation
4. Adjustment of the end position
5. Operating instructions | safety instructions | mounting from accessories | mounting on valve
6. Maintenance instructions | disassembly | assembly |
7. Switching times
8. Storage
IMPORTANT NOTICE
oMake sure that the drive is only used within the permissible limits (see technical specification).
oOperating the drive outside the permissible temperature range can overload and damage seals and
bearings.
oOperating the drive above the maximum permissible working pressure can damage internal
components and housing.
oOperating the actuator in extremely corrosive environments with inappropriate protection may
damage internal and external components.
oNever disassemble the spring assemblies into their individual parts, this can lead to serious injuries.
The spring assemblies should only be replaced completely.
oDisconnect all supply lines and make sure the actuator is depressurized before performing
installation or maintenance.
oNever loosen or remove covers or existing accessories when the actuator is under pressure.
oCheck the direction of rotation and position of the actuator in a test run before mounting the
actuator on a valve.
oIf the actuator is to be used as part of a system, as a safety element or as part of a circuit, compliance
with the specified laws and safety regulations must be ensured.
OPERATING CONDITIONS and TECHNICAL DATA
Use dry, oiled or non-oiled compressed air that is compatible with the internal components and
lubricants. The operating medium must have a dew point at -20° C or at least 10° C below the ambient
temperature. The particle size must not exceed 30 µm.

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 3
Http
www.wesa-armaturen.de
Deutschland
Operating pressure: The maximum operating pressure is 8 bar. The double-acting as well as the single-
acting actuators can normally be operated in the pressure range from 2.5 bar to 8 bar.
Operating temperature: Standard drive from -20° C to + 80° C.
Switching: time See attached technical data sheet.
Important: the switching time depends on many factors, e.g.: Operating pressure, supply capacity (pipe
Ø, flow capacity of the pneumatic accessories), valve type, torque and course of the valve, calculated
safety factor, switching frequency, temperature, etc.
Design: rack and pinion principle
Coating and corrosion protection: All actuators are protected against corrosion for normal
environmental influences.
Actuator designation: The actuator type, size, torque, spring action direction are specified by the
actuator designation.
FUNCTION AND DIRECTION OF ROTATION
oThe actuator is a pneumatic component for remote control of valves.
oThere are different possibilities for the control 90°:
oDirect mounting of a solenoid valve (5|2 for double-acting, 3|2 for single-acting) to pressure ports
2 and 4.
oPiping (to pressure ports 2 and 4) with separate control unit.
oThe standard direction of rotation is clockwise closing, a counterclockwise direction of rotation is
achieved for double-acting actuators by pressurizing port 2.
SETTING THE END POSITION [Positions 25 + 26]
Left adjusting screw: position -OPEN-.
Loosen the lock nut, by unscrewing the adjusting screw the opening angle is increased by max. 5°. After
the adjustment, tighten the lock nut again.
Right adjusting screw: position -CLOSED-.
Loosen the lock nut and tighten the adjusting screw to reduce the opening angle by max. 5°. After the
adjustment, tighten the lock nut again.
After the adjustment process, check the actuator for tightness!

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 4
Http
www.wesa-armaturen.de
Deutschland
DOUBLE ACTING PNEUMATIC ACTUATOR DW
-OPEN COUNTERCLOCKWISE-
Supply air via port -2-
DOUBLE ACTING PNEUMATIC ACTUATOR DW
-CLOSE CLOCKWISE-
Supply air via port -4-
SINGLE ACTING PNEUMATIC ACTUATOR FR
SPRING FORCE CLOSING
-CLOSE CLOCKWISE-
Supply air via port -4-

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 5
Http
www.wesa-armaturen.de
Deutschland
SINGLE ACTING PNEUMATIC ACTUATOR FR
SPRING FORCE CLOSING
-OPEN COUNTERCLOCKWISE-
Supply air via port -2-
SINGLE ACTING PNEUMATIC ACTUATOR FR
SPRING FORCE OPENING
-OPEN COUNTERCLOCKWISE-
Supply air via port -4-
DRIVE PISTON INSTALLED UPSIDE DOWN
SINGLE ACTING PNEUMATIC ACTUATOR FR
SPRING FORCE CLOSING
-CLOSE CLOCKWISE-
Supply air via port -2-
DRIVE PISTON INSTALLED UPSIDE DOWN

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 6
Http
www.wesa-armaturen.de
Deutschland
OPERATING INSTRUCTIONS
The WESA actuator is a pneumatic actuator for remote operation of industrial valves. The actuator
operates various types of valves by a 90° rotation by opening and closing. All necessary information
to mount the actuator correctly and safely on a valve, e.g.: Dimension, torque, air volume, end
position setting, switching time, working temperature, direction of rotation can be found in the
technical data sheets. Please read the technical information carefully before starting the installation
of the valve.
Important safety instructions
During installation, the actuator must be depressurized for safety reasons. When connecting the
actuator to the air supply, extreme cleanliness should be observed. In particular, the threaded
connections, screw connections and seals must be clean and free of dirt. If you mount accessories
on the actuator, make sure that the upper shaft end remains free so that manual operation may still
be possible later. Before mounting the actuator on a valve, please ensure that the valve is in the
correct initial position depending on the required direction of rotation.
Solenoid valve mounting
Before mounting a solenoid valve, please check if the actuator is in the initial position (closed
position,). For standard mounting and clockwise closing rotation: the shaft at the top must be
perpendicular to the longitudinal axis of the actuator in the closed position. Mount the solenoid valve
on the actuator using screws provided for this purpose.
Limit switch box mounting
The box and limit switch bracket on the actuator, using screws provided for this purpose.
Actuator mounting on a valve
Before you start, please make sure that the actuator rotates in the required direction and that both
parts, actuator and valve, are correctly positioned in relation to each other. IMPORTANT: if you are
building a single-acting actuator (with spring) with a defined fail-safe position, please check that in
case of failure of pneumatic or electric power the direction of rotation corresponds to your
application (clockwise closing). Now attach the actuator to the valve. The actuator should be in the
initial position (CLOSED position).
Direct mounting
Insert the square, dihedron or key of the valve shaft directly into the shaft of the actuator and screw
the two parts tightly to the actuator through the ISO flange.
Bracket mounting
Mount the bracket on the valve and then plug the coupling onto the valve shaft. Make sure that the
position indicator of the coupling corresponds to the switching position of the valve. Then fit the
actuator and screw the unit tight.

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 7
Http
www.wesa-armaturen.de
Deutschland
MAINTENANCE INSTRUCTIONS
With the instructions listed below, WESA aims to provide its customers with all the information they
need for maintenance. Under normal operating conditions, only a periodic check is necessary to
ensure proper functioning.

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 8
Http
www.wesa-armaturen.de
Deutschland
PART-No.
QTY
DESRIPTION
MATERIAL
1
4
Position indicator
Polypropylene + GF
2
1
Position indicator holder
Polypropylene + GF
3
1
Spring clamp (drive pinion)
Stainless steel nickel plated
4
1
Lock washer (drive pinion)
Stainless steel
5
1
Guide bearing (drive pinion)
Polyphytalamide
6
1
Housing
Aluminum alloy anodized
7
2
Guide rail
Polyphytalamide
8
2
Piston
Cast aluminum hard anodized
9
2
O-ring (drive pinion)
Nitrile (NBR 70)
10
2
Guide rail
Polyphytalamide
11
8
Bearing bolt washer
Stainless steel
12
2
Bearing bolt (end cap)
Stainless steel
13
2
right and left end cap
Aluminum alloy anodized
14
2
O-ring (end cap)
Nitrile (NBR 70)
15
2
Piston guide bearing
Polypropylene + GF
16
1
O-ring (piston top)
Nitrile (NBR 70)
17
1
Guide rail (piston top)
Nylon 46
18
1
Guide bearing (piston)
Polyphytalamide
19
1
Open/close cam
Stainless steel
20
1
Drive shaft
Steel, nickel-plated
21
1
Guide rail (piston bottom)
Nylon 46
22
1
O-ring (piston bottom)
Nitrile (NBR 70)
23
1
O-ring (stop screw)
Nitrile (NBR 70)
24
2
Stop washer
Stainless steel
25
2
Stop nut
Stainless steel
26
2
Stop bolt
Stainless steel
27
Satz
min. 5 | max. 12 Spring
High alloy spring steel Epoxy coated
28
1
Spring holder
Polypropylene + GF

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 9
Http
www.wesa-armaturen.de
Deutschland
DISASSEMBLY
If it is necessary to disassemble the actuator for maintenance, disassemble the actuator from the valve.
It is important to ensure that the actuator is not pressurized before disassembling any components.
Work carefully and check that port 2 and 4 are open. Disassemble any accessories or connections.
When disassembling the single-acting actuators, make sure that the actuator is in the fail-safe position
(springs released). All disassembled and unreplaced components should be thoroughly cleaned and
checked for wear before reassembly.
1. Disassembly of the cover
Disassemble the screws. Caution: When disassembling a single-acting drive, loosen the cover
screws alternately. If after 4-5 screw turns there is no noticeable relief on all screws, this may be
an indication of damaged spring assemblies. In this case, the disassembly should be aborted.
Further cover disassembly may result in serious injury to maintenance personnel. Return actuator
to supplier immediately. For single-acting actuators, remove spring assemblies, remove cover
gasket and replace if necessary.
2. Disassembly of the pistons
Clamp the housing in a vice or similar tool. Turn the shaft until the pistons are released. Caution:
Compressed air must not be used to remove the pistons from the housing (projectile effect).
Carefully remove piston seals using a screwdriver, remove piston guide jaws and piston guides.
Replace O-ring in case of replacement.
3. Disassembly of the shaft
Carefully remove snap ring with snap ring pliers, remove washer and thrust washer. Press the shaft
downwards with light pressure on the upper side until it is possible to remove the cam and the
internal thrust washer. Then pull the shaft completely out of the housing. If the shaft cannot be
removed by hand, it can be driven out by lightly tapping the top of the shaft with a plastic hammer.
Remove the upper and lower piston bearings, and upper and lower seal rings. Replace the bearings,
internal and external thrust washers, and O-rings and, if necessary, replace all spare parts.
ASSEMBLY
Before assembly, all components must be clean and in perfect condition.
4. Mounting of the shaft
Install upper and lower shaft bearings, then install upper and lower shaft seals on the shaft. Grease
the outside of the shaft surface at the top and bottom. Partially insert the shaft into the housing,
then mount the cam in the desired position in relation to the position of the shaft head and shaft
flow and the direction of rotation of the drive. Then mount thrust washer, insert shaft completely.
Mount external thrust washer, mount washer and snap ring with snap ring pliers.

INSTALLATION-and OPERATION MANUAL
PNEUMATIC ROTARY DRIVE UNIT [ACTUATOR] DW|FR
MANUAL
Phone
[phone]
WESA-Armaturen GmbH
PNEUMATIC ACTUATORS DW|FR
Telefax
[phone]
Spanninger Straße 5
DOUBLE|SINGLE ACTING
mailto
[email protected]
73650 Winterbach
Status 03-2022
Page 10
Http
www.wesa-armaturen.de
Deutschland
ASSEMBLY
5. Mounting of the pistons
Install piston sealing rings, install piston guide and piston bearings. Grease the running surface of
the pistons in the housing and the teeth of the pistons. Hold housing in horizontal position by
clamping upper shaft end in a vice or by countering shaft end with an appropriate counterpart.
Make sure that the cam is in the correct position. For standard direction of rotation (clockwise
closing), rotate the housing 40-45° counterclockwise, as seen from the bottom view. Or turn
clockwise, as seen from the top view, depending on how the shaft is held. Press both pistons into
the housing at the same time until the pistons grip and turn the housing clockwise or
counterclockwise to the end of stroke. Check that the pistons rotate the shaft 4° above the
centerline in the end position.
6. Mounting of the cover
Tread housing. For single-acting actuators, insert the correct number of spring assemblies in the
cover. Mounting of the cover sealing rings in the groove of both covers. Mounting the covers to
the housing. Make sure that the O-rings are in the grooves. Screw in the cover screws by hand.
7. Mounting of the adjusting screws
Insert both adjusting screws, lock nuts, washers and O-rings. Screw the adjusting screws into the
housing.
SWITCHING TIMES
Double-acting rotary actuator DW
Article DW
01
02
03
04
05
06
07
08
09
OPEN
[sec.]
0,15
0,20
0,25
0,30
0,40
0,50
0,90
1,50
2,70
CLOSE
[sec.]
0,15
0,25
0,30
0,40
0,50
0,70
1,20
1,80
3,50
Single-acting rotary actuator FR
Article FR
01
02
03
04
05
06
07
08
OPEN
[sec.]
0,25
0,30
0,35
0,50
0,60
1,10
1,70
3,20
CLOSE
[sec.]
0,30
0,35
0,50
0,60
0,90
1,40
2,10
4,00
STORAGE
If the actuators are to be stored, the following points must be observed:
oStore in a dry place at normal ambient temperature.
oStorage in the original packaging is recommended.
oDo not remove the plastic protective caps from the compressed air connections A and B.