Festo DRQD-40 ... 50-... - Handbuch (Seite 58)

DRQD−...
Festo DRQD−... 0907e English
58
For all DRQD types:
S Check whether additional shock abĆ
sorbers are needed.
Additional external shock absorbers are
necessary in the following cases:
ć for movable masses with a mass
moment of inertia greater than the
determined
permitted mass moment
of inertia
ć when the DRQD is operated without
an air cushion on the exhaust side
(e.g. after long breaks between the indiĆ
vidual rotation movements).
Installing the pneumatic system
For setting the rotation speed:
S Use the GRLA one−way flow control valves.
These are screwed directly into the compressed air ports.
Fig. 37
For eccentric masses:
S Use the controlled check valve HGL or a compressed air spacer compensation
reservoir VZS.
In this way you can prevent the moveable mass from sliding down suddenly if
there is a sudden drop in pressure.
Fig. 36