Quarter turn actuator
DAPS..R..-F..
Festo AG & Co. KG
Postfach
D-73726 Esslingen
+49 711 347-0
www.festo.com
(en) Operating instructions 8030408
1309g
[8030416]
Original: de
Quarter turn actuator DAPS..R..-F.. English................................
1 Control sections and connections
9
12 3 4 5
6
78
aJaA
1 Transmission shaft (shaft groove
shows the process valve position –
here closed)
2 Compressed air supply port 2 (A)
3 Four mounting threads – such as
for mounting the limit switch or
sensor box
4 Compressed air supply port 4 (B)
5 Mounting thread for threaded pin
for aligning the NAMUR valve
6 View from below – flange to
ISO 5211
7 Star-shaped coupling for seating
of the square of a process valve
8 Mounting thread
9 Some product designs:
leakage groove
aJ Mounting thread for pneumatic
NAMUR switching valve
aA Only for product variants with the
ability to adjust the end position:
lock nut for securing the set end
position.
Fig. 1 Operating elements and connections – example of standard design,
double-ac ting
2Design
Quarter turn actuators of the DAPS series are compact in design and have simple
and robust mechanics with little w ear and tear. The design of the product is de-
pendent 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, 6 ) and, if applicable,
a limit switch or sensor box ( Fig. 1, 1 ).
The flange to the process valve is normally designed in accordance with ISO 5211
( section 12). Four mounting threads on the top are used for mechanical attach-
ment 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 ( NAMU R).
The housing of some quarter turn actuators has, on the process valve port side, a
leakage groove ( Fig. 1, 9 ) through which the leakage of an untight process
valve can escape.
The product is available in various designs. Depending on the version, the DAPS is
designed as a single-acting or double-acting quarter turn actuator. The single-act-
ing design with spring return is av ailable with different spring strengths for various
supply pressures.
These operating instructions describe the following product variants:
Features
Type codes Description
Series DAPS- Quarter turn actuator
Size or nominal torque in
Nm
0008-
…
8000-
Nominal to rque 8 Nm
…
Nominal torque 8000 Nm
Swivel angle in degrees 090- 90°
Closing direction R Closes to right
Mode of operation - (without)
S
Double-acting
Single-acting
Spring strength (with
mode of operation S)
(without)
1-
2-
3-
4-
(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 b ar
Spring strength for connection pressure 5.6 bar
1st flange hole pattern F03
…
F25
Flange hole pattern F03
…
Flange hole pattern F25
2nd flange hole pattern (without)
05
…
16
No second flange hole pattern
Flange hole pattern F05
…
Flange hole pattern F16
Design (without)
-T6
-CR
Standard design (-20 °C to + 80 °C)
Low temperature (-50 °C to +60 °C)
Stainless steel (-20 °C to + 80 °C)
Fig. 2 Type code (e.g. DAPS-0120-090-R-F0507-CR)
Select suitable accessories (e.g. adapte r kits) from the catalogue
(www.festo.com/catalogue).
3 Function
The piston movement of the DAPS is c onverted 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 th e c ylinder chambers
cause the piston in the DAPS to move back and forth.
The
linear motion of the piston is transformed into a swiv-
el motion of the transmission shaft.
Fig. 3
For single-acting quarter turn ac tuators:
Return is through spring force.
Product designs with different spring st r engths are
available ( Fig. 2).
Fig. 4
The screwed-on processing valve absorbs t he reaction torque of the quarter turn
actuator. The torques permitted in accordance with the technical data
( c atalogue www.festo.com/catalogue) apply here.
4 Application
The DAPS quar ter 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 suit-
able 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.
Warning
Danger of crushing! Danger of shearing!
The DAPS weighs up to about 183 kg, depending on the product version.
Body parts ca n be crushed or cut off if the product falls.
• For product versions weighing more than 12 kg, always use appropriate load-
carrying equipment in order to handle the product sa fely during transport and
assembly.
6 Requirements for product use
Note
Incorrect handling c an result in malfunctions.
• Make sure that all the instructions in this section are always observed. The
product will then function correctly and safely.
• Compare the limit v alues specified in these operating instructions with your
actual application (e.g. pressures, force s, to rques, masses, speeds, temperat-
ures). The product c an be operated in compliance with the relevant safety
guidelines only if the load limits are observed.
• Ensure that all applicable regulations for your location are adhered to, e.g. of
the trade association or national institutions.
(4 Seiten)
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