Festo DAPS..R..-F.. - Manual (Page 4)

Quarter turn actuator
DAPS..R..-F..
Festo AG & Co. KG
Postfach
D-73726 Esslingen
++49/711/347-0
www.festo.com
Operating instructions 8001089
1110e
Original: de
Quarter turn actuator DAPS English . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Operating parts and connections
Example of connections on the double-acting quarter turn actuator DAPS:
7
2 1 4 3 5
8 6
Fig. 1
1 Transmission shaft for mounting
the limit switch
2 Supply port 2 (A) for actuating and
anti-clockwise turning of the
quarter turn actuator
3 4 mounting threads for mounting
the limit switch
4 Supply port 4 (B) for actuating
and clockwise turning of the
quarter turn actuator
5 Mounting thread for threaded
pin for aligning the NAMUR valve
6 View from below: star-shaped
coupling for holding the square
of a processing valve
7 Mounting thread for pneumatic
NAMUR switching valve
8 Lock nut for retaining the set
piston stop.
Fig. 1
2 Function
The DAPS quarter turn actuator is tailored completely to the requirements of the
processing industry. It is used for controlling media-flow processing valves in sys-
tems.
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°. The single-acting design with spring return is equipped with differ-
ent spring forces for use with different supply pressures.
The screwed-on processing valve records the moment of reaction of the quarter
turn actuator. The torques permitted in accordance with the technical specifica-
tions (
catalogue www.festo.com/catalogue) apply here.
3 Application
The quarter turn actuator DAPS has been designed for actuating processing valves
with approx. 90° rotation angle (e.g.: ball valve, butterfly valve).
4 Transport and storage
Ensure storage conditions as follows: Short storage periods in cool, dry, shaded
and corrosion-protected locations.
5 Conditions of use
Note
Incorrect handling can result in malfunctioning.
• Make sure that all the instructions in this chapter are observed. The product
will then function correctly and reliably.
• The product is not a safety component and must only be used as designated.
• Use the product in its original state. Unauthorised modification is not permitted.
• Make sure that safety measures cannot be ignored.
• Ensure that all applicable national and local safety laws are adhered to.
• Remove the packing except for the adhesive labels on the supply ports
(to prevent dirt). The packing is intended for recycling (except for: oiled
paper = other waste).
• Compare the maximum values specified in these operating instructions with
your actual application (e.g. pressures, forces, torques, masses, speeds, tem-
peratures). The product can only be used in accordance with the relevant safety
guidelines if the maximum load limits are observed.
• Take into consideration the ambient conditions at the location of use. Corrosive
environments reduce the service life of the product.
• Protect the device from fluctuations in pressure and excess operating tempera-
ture. Use control valves for regulating pressure and excess pressure.
• Ensure that there is a supply of correctly prepared compressed air. The product
requires dried compressed air, lubricated or unlubricated.
Note
• Use only non-lubricated 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 condi-
tions. The oil must be chemically inert and must not carbonise.
If lubricated compressed air is used:
The initial lubrication will be washed out. The quarter turn actuator may then
only be operated with lubricated compressed air.
Note
If the DAPS quarter turn actuator is used in a potentially-explosive atmosphere:
• Please observe the notes and instructions in the accompanying special
documentation for the device.
• Exposure to external impact can result in faults. Protect the device from objects
falling down onto it.
6 Fitting
Note
The following instructions on fitting the DAPS quarter turn actuator onto a processing
valve may only be used in the following circumstances:
– When the quarter turn actuator is fitted in the direction of the tubing
– If a 2-way processing valve is used:
The 2-way processing valve must be closed.
– If a 3-way processing valve is used:
The switching status of the 3-way processing valve must be known.
Note
If a 3-way processing valve is used:
• Align the quarter turn actuator so that the ports for a NAMUR valve face the
side without tubing.