User Manual

Quarter turn actuator
DAPS..R..-F..-MW..
Festo AG & Co. KG
Postfach
D-73726 Esslingen
[phone]
www.festo.com
(en) Operating instructions 8024409
1309NH
[8030433]
Original: de
Quarter turn actuator DAPS..R..-F..-MW.. English...........................
1 Control sections and connections
Example of connections on the double-acting quarter turn actuator DAPS:
12
34
5
6
7
89aJ
aAaB
aCaD
1 Tra nsmission 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
7 View from below – flange to
ISO 5211
8 Mounting thread
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.
Fig. 1
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, 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 attach-
ment in accordance with VDI/VDE 3845 (NAMUR).
Depending on the version, the DAPS is designed as a single-acting or double-acting
quarter turn actuator.
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 e quipped 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
Type code Description
Series DAPS- Quarter turn actuator
Size or nominal torque in Nm 0053-
…
1920-
Nominal torque 53 Nm
…
Nominal torque 1920 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 mo de
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 F05
…
F14
Flange hole pattern F05
…
Flange hole pattern F14
2nd flange hole pattern (witho ut)
07
…
16
No second flange hole pattern
Flange hole pattern F07
…
Flange hole pattern F16
Manual emergency o v erride -MW with h andwheel
Design (without)
-T6
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)
Select suitable accessories (e.g. adapte r kits) from the catalogue
(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 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
swivel 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 records the moment of reaction of the quarter
turn actuator. The torques permitted in accordance with the tec hnical specifica-
tions ( catalogue www.festo.com/catalogue) apply here.
The handwheel can be used to change the position of the actuator when the sup-
ply 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 c an 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