Installation Of The Pneumatic Control Unit Type 8690 On Process Valves Of Series 21Xx - Burkert 8690 Manuel D'utilisation

7.2. installation of the pneumatic
control unit Type 8690 on
process valves of series 21xx
procedure:
1. install switch spindle:
Transparent cap
Pilot air ports
(plug-in hose con-
nectors with collets or
threaded bushings)
Actuator
Fig. 6: Installation of the switch spindle (1), 21xx series
→
Unscrew the transparent cap on the actuator and unscrew the
position display (yellow cap) on the spindle extension.
→
For version with plug-in hose connector, remove the collets
(white nozzles) from both control air connections (if present).
16
english
Type 8690 Ex
Installation
Fig. 7: Installation of switch spindle (2), 21xx series
noTE!
improper installation may damage the groove ring in the
guide element!
The groove ring is already be pre-assembled in the guide element
and must be "locked into position" in the undercut.
• When installing the switch spindle, do not damage the groove ring.
→
Push the switch spindle through the guide element.
Switch cam
Switch spindle
Guide element
Groove ring
max. 1 Nm
max. 5 Nm
Actuator cover
O-ring
Spindle extension