Festo DAPS User Manual
Quarter turn actuator
DAPS..R..-F..-MW..
Festo AG & Co. KG
Postfach
D-73726 Esslingen
+49 711 347-0
www.festo.com
(en) Operatinginstructions 8024409
1309NH
[8030433]
Original: de
Quarter turn actuator DAPS..R..-F..-MW.. English...........................
1 Control sections and connections
Example of c onnections on the double-acting quarter turn actuator DAPS:
12
34
5
6
7
The housing of some quarter turn actuators has, on the process valve port side, a
leakage groove ( Fig. 1, aJ ) through which the leakage of an untight process
valve can escape.
The single-acting design with spring return is equipped with different spring forces
for use with different supply pressures.
The DAPS...-MW product version described here is equipped with a handwheel for manual emergency override in a pressureless state.
The product is available in various designs. These operating instructions describe
the following product variants:
Features
Series DAPS- Quarter turn actuator
Size or nominal torque in Nm 0053-
Swivel angle in degrees 090- 90 °
Closing direction R Closes to right
Mode of operation - (without)
Spring strength (with mode
of operation S)
1st flange hole pattern F05
2nd flange hole pattern (without)
Manual emergency override -MW with handwheel
Design (without)
Type code Description
…
1920-
S
(without)
1234-
…
F14
07
…
16
-T6
Nominal torque 53 Nm
…
Nominal torque 1920 Nm
Double-acting
Single-acting
(Omitted for double-acting)
Spring strength for connection pressure 2.8 bar
Spring strength for connection pressure 3.5 bar
Spring strength for connection pressure 4.2 bar
Spring strength for connection pressure 5.6 bar
Flange hole pattern F05
…
Flange hole pattern F14
No second flange hole pattern
Flange hole pattern F07
…
Flange hole pattern F16
Standard design (-20 °C to + 80 °C)
Low temperature (-50 °C to 60°C)
Fig. 2 Type code (e.g. DAPS-0480-090-R-F1012-MW-T6)
aCaD
1 Transmission shaft (shaft groove
shows the process valve position–
open here)
2 Compressed air supply port 2 (A)
3 Four mounting threads – e.g. for
mounting the limit switch or
sensor box
4 Compressed air supply port 4 (B)
5 Handwheel
6 Shield tube with inspection win-
dow
aAaB
89aJ
8 Mountingthread
9 Star-shaped coupling for seating
of the square of a process valve
aJ Leakage groove
aA Locking spring
aB Mounting thread for threaded pin
for aligning the NAMUR valve
aC Mounting thread for pneumatic
NAMUR switching valve
aD Lock nut for retaining the set end
position.
7 View from below – flange to
ISO 5211
Fig. 1
2Design
Quarter turn ac tuators of the DAPS series are compact in design and have simple
and robust mechanics with little wear and tear. The design of the product is dependent on the product design and may differ from the representation shown in
Fig. 1 ( Fig. 1).
Through the housing, a shaft is guided outward on both sides. Through this, the
reaction torque is transmitted to a process valve ( Fig. 1, 9 ) and, if applicable,
a limit switch or sensor box ( Fig. 1, 1 ).
The flange to the process valve is designed in accordance with ISO 5211. Four
mounting threads on the top are used for mechanical attachment of a limit switch
or sensor box ( Fig. 1, 3 ). The housing side has a hole pattern for valve attachment in accordance with VDI/VDE 3845 (NAMUR).
Depending on the version, the DAPS is designed as a single-acting or double-acting
quarter turn ac tuator.
Select suitable accessories (e.g. adapter kits) from the c atalogue
(www.festo.com/catalogue).
3 Function
The piston movement of the DAPS is converted to a rotary movement by means of
yoke kinematics(Scotch yoke). These kinematics are only effective within an angle
of approx. 90°.
For double-acting quarter turn actuators:
Pressurising and venting of the cylinder chambers
cause the piston in the DAPS to move back and forth.
The linear motion of the piston is transformed into a
swivel motion of the transmission shaft.
Fig. 3
For single-acting quarter turn actuators:
Return is through spring force.
Product designs with different spring strengths are
available ( Fig. 2 ).
Fig. 4
The screwed-on processing valve records the moment of reaction of the quarter
turn actuator. The torques permitted in accordance with the technical specifications ( catalogue www.festo.com/catalogue) apply here.
The handwheel can be used to change the position of the actuator when the supply pressure is switched off (manual emergency override).
Neutral position
If the indicator is located centrally , the
handwheel is in a neutral position.
– The piston can be moved freely.
– The actuator can be operated pneumatic-
ally.
Fig. 5
Indicator in left-hand position (inside)
A) Double-acting actuator:
Turning the handwheel anti-clockwise
moves the indicator inwards.
– The process valve opens.
B) Single-acting actuator:
Turning the handwheel clockwise moves the
indicator inwards.
– The process valve closes.
Fig. 6
Indicator in right-hand position (outside)
A) Double-acting actuator:
Turning the handwheel clockwise moves the
indicator outwards.
– The process valve closes.
B) Single-acting actuator:
Turning the handwheel anti-clockwise
moves the indicator outwards.
– The process valve opens.
Fig. 7
4 Application
The DAPS quarter turn actuator is intended to activate right-closing process
valves, such as ball valves and butterfly valves with a rotation angle from 0° (valve
closed) to 90° (valve open).
It is completely tailored to the requirements of the processing industry and is suitable for control of media-flow process valves in fluid engineering systems.
5 Transport and storage
Ensure the following storage conditions: short storage times in cool, dry, shaded
and corrosion-resistant locations.
War n ing
Danger of c rushing! Danger of shearing!
The DAPS weighs up to about 50.6 kg, depending on the product version.
Body parts can be crushed or cut o ff if the product falls.
• For product versions weighing more than 12 kg, always use suitable load-carrying equipment in order to handle the product safely during transport and
assembly.
Note
• Use only unlubricated compressed air under normal conditions.
The DAPS quarter turn actuator possesses an initial lubrication which suffices
for the complete service life.
Note
Continuous operation at the limits of the specified ambient temperature and
work frequency can reduce the service life of the quarter turn actuator.
• Use lubricated compressed air for continuous operation under extreme conditions. The oil must be chemically inert and must not carbonise.
If lubricated compressed air is used:
The initial lubricationwill be washed out. The quarter turn actuator may then
only be operated with lubricated compressed air.
7 Installation
Note
The following instructions on fitting the DAPS quarter turn actuator onto a processing valve may only be used in the following circumstances:
– The quarter turn actuator is installed in the direction of the tubing.
– If a 2-way process valve is used:
The 2-way process valve is closed.
– If a 3-way process valve is used:
The switchingstatus of the 3-way process valve is known.
Note
Improper handing can cause damage to the product!
• Never use the handwheel to lift the actuator.
6 Requirements for productuse
Note
Improper handling can result in malfunctions.
• Make sure that all the instructions in this chapter are always observed. The
product will then function correctly and safely.
• Compare the maximum values specified in these operating instructions with
your actual application (e.g. pressures, forces, torques, masses, speeds, temperatures). The product can only be used in compliance with the relevant safety
guidelines if the maximum load limits are observed.
• Ensure that all applicable regulations for your location are adhered to, e.g. of
the trade association or national institutions.
• Take into consideration the ambient conditions at the location of use. Corrosive
environments reduce the service life of the product.
• Remove the packaging except for the adhesive labels on the compressed air
supply ports (danger of contamination). The material used in the packaging has
been specifically chosen for its recyclability (exception: oil paper = residual
waste).
• Use the product in its original status, without any unauthorised product modifications.
• Protect the device from pressure fluctuations. Use control valves for regulating
pressure and excess pressure.
• Make sure the c ompressed air is properlyprepared (Technical data
section 12).
• Before carrying out installation, dismantling and maintenance work, switch off
the compressed air supply and vent the actuator. Secure compressed air supply
against acc idental restarting.
• Never remove the end cap, shield tube or handwheel.
• Never use a wrench to operate t he transmission shaft by hand.
• Never use levering tools to operate the handwheel.
Danger
In the case of single-acting DAPS, high spring forces (mechanically stored energy) are at work inside the product.
Parts can be ejected and cause serious personal injuries if the end cap is dismounted.
• Never remove the end cap!
• Return the product to Festo if defective or for service.
Note
If a 3-way processing valve is used:
• Align the quar ter turn actuator so that the port openings for a NAMUR valve
facethesidewithouttubing.
Note
Outflowing processing medium must not penetrate into the quarter turn actuator.
The housing of some quarter turn actuators has a leakage groove on the process
valve port side. If the processing valve leaks, the leakage can flow through the
open groove.
• For housings with a leakage groove, make sure the groove is not sealed. In
this way you can be sure that neither processing medium nor escaping air
from the processing valve can penetrate into the quarter turn actuator.
The DAPS quarter turn actuator can be mounted with or without an adapter bridge.
If there are high media temperature s in the tubing and in processing valve:
• Use an adapter bridge and also a heat-insulated coupling extension.
7.1 Mechanical installation
• In order to mount the DAPS quarter turn actuator, set the switching shaft of the
process valve so that the desired operating method for opening and closing the
process valve is implemented.
• Note that a processing valve with butterfly valve can only be opened in one direction and closed in the opposite direction.
• Observe the tightening torque:
Thread
Tightening torque [Nm] 5…610 …1120 …2345 ...5080 …85125 …
M5 M6 M8 M10 M12 M14 M16 M20
190 …
200
370 …
390
135
Fig. 8
To mount the quarter turn actuator without an adapter
bridge:
1. Place the quarter turn actuator on the switching
shaft of the processing valve. Make sure here that
the square of the processing valve sits in the starshaped coupling of the quarter turn actuator
without being tilted.
2. Fasten the quar ter turn actuator with 4 corrosionresistant screws and retaining rings (material: VA)
to the connection flange of the process valve.
3. Tighten all the screws in diagonally opposite sequence. Tightening torque Fig. 8.
4. Continued Point 6.
Fig. 9
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