Festo DAPS..R..-F.. - Manual (Page 5)

Note
Outflowing processing medium must not penetrate into the quarter turn actua-
tor.
The housing of the quarter turn actuator possesses a leakage groove on the
connection side for the processing valve. If the processing valve leaks, the lea-
kage can flow through the open groove.
• Make sure that this leakage 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 fitted with or without a mounting adapter.
If there are high medium temperatures in the tubing and in the processing valve:
• Use a mounting adapter and also a heat-insulated coupling extension.
6.1 Fitting mechanical components
• In order to fit the DAPS quarter turn actuator, set
the switching shaft of the processing valve so that
the desired working method for opening and
closing the processing valve is implemented.
Fig. 2
• Note that a processing valve with butterfly valve
can only be opened in one direction and closed in
the opposite direction.
Fitting the quarter turn actuator without a mounting
adapter:
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 star-
shaped coupling of the quarter turn actuator
without being tilted.
2. Fasten the quarter turn actuator with 4 corrosion-
resistant screws and spring rings (material: VA)
to the connecting flange of the processing valve.
3. Tighten all the screws in diagonally opposite sequence.
Tightening torque Fig. 3.
4. Continued Point 6.
DAPS F03 F04 F05 F07 F10 F12 F14 F16 F25
Tightening torque [Nm] 2.5 2.5 2.5 4 10 12 12 15 12
Fig. 3
To fit the quarter turn actuator with a mounting
adapter you will need:
Fig. 4
9
aJ
– a mounting adapter 9,
– a shaft extension aJ.
1. Align the mounting adapter so that its steps face
the direction of the longitudinal axis of the quarter
turn actuator and, if applicable, the open side of
the mounting bridge must face the processing
valve.
2. Fasten the mounting adapter on the quarter turn
actuator. Do not yet tighten the screws.
3. Pass the shaft extension through the mounting
adapter into the star-shaped coupling on the
bottom of the quarter turn actuator. Make sure
that the shaft extension sits in the coupling
without being tilted.
4. Fasten the quarter turn actuator with mounting adapter and shaft extension to
the connecting flange of the processing valve. Make sure here that the square
of the processing valve sits in the shaft extension without being tilted.
5. Tighten all the screws in diagonally opposite sequence.
Tightening torque Fig. 5.
DAPS F03 F04 F05 F07 F10 F12 F14 F16 F25
Tightening torque [Nm] 2.5 2.5 2.5 4 10 12 12 15 12
Fig. 5
After fitting the quarter turn actuator:
6. Check that the quarter turn actuator turns in the required direction of rotation
and whether the processing valve assumes the required position.
7. If the quarter turn actuator does not turn in the required direction of rotation:
Carry out the following conversion:
Double-acting drives Single-acting drives
1. Remove the pneumatic solenoid valve.
2. Turn the solenoid valve 180°.
3. Note the position of the threaded pin for
orientating a NAMUR valve.
4. Fasten the solenoid valve again.
1. Remove the screws on the drive side.
2. Turn the drive 90° while it is still connected
via the shaft extension or directly with the
processing valve.
3. Tighten the retaining screws.
6.2 Fitting pneumatic components
Connections for the compressed air supply
• DAPS quarter turn actuator, double-acting – standard design
– Air supply at connection 2 (A) – see Fig. 1 2
Rotational movement of the shaft in an anti-clockwise direction.
– Air supply at connection 4 (B) – see Fig. 1 4
Rotational movement of the shaft in a clockwise direction.
• DAPS quarter turn actuator, single-acting with spring return – standard design
– Air supply at connection 4 (B): Rotational movement in an anti-clockwise
direction.
– Spring return: Clockwise rotation
Note
• Fasten a filter element to exhaust port 2 (A) of the single-acting quarter turn
actuator type DAPS.
In this way no dirt particles can enter the product.
6.3 Fitting electric components
Using the pneumatic switching valves
• Please note the instructions and explanations in the relevant operating instruc-
tions for the pneumatic valves.
7 Commissioning
Note
• Make sure that the operating conditions chapter 11 lie within the permit-
ted ranges.
The product is ready for operation as soon as it is fitted and electrically and pneu-
matically connected.
• Make sure that a processing valve fitted to the quarter turn actuator can be
switched without hindrance.
• Slowly pressurise the quarter turn actuator.
For slow start-up pressurisation use soft-start valve type HEL.
• Adjust the piston stops of the quarter turn actuator.
This setting serves for optimising the opening or
closing reaction of the connected processing valves.
– On the double-acting quarter turn actuator only
the end position can be adjusted by pressurisation
via connection 2 (A).
– On the single-acting quarter turn actuator only the
end position can be adjusted by spring return.
Fig. 6
1. Loosen the lock nuts on both sides of the DAPS.
On both sides there appears a threaded rod for setting the piston stop.
2. Turn the threaded rods with an Allen key until the processing valve opens or
closes correctly.
3. Screw the lock nuts onto the threaded rods again and tighten them. Tightening
torque: 5 Nm.
8 Care and maintenance
If used as designated in the operating instructions, the device will be free of main-
tenance.
9 Dismantling
Warning
Never try to dismantle a quarter turn actuator under pressure.
• Switch the pneumatic circuit pressureless.
Warning
• Switch the tubing system pressureless before dismantling.
1. If necessary, remove any existing limit switches.
2. Remove the pneumatic switching valve.
3. Loosen the screws on the flange of the processing valve.
4. Remove the quarter turn actuator (if necessary including mounting adapter and
coupling extension) from the processing valve.