Burkert 8690 Manuel D'utilisation page 17

→
Screw the plug-in hose connectors onto the Pneumatic Control
Unit and the actuator.
→
Using the hoses supplied in the accessory kit, make the con-
nection between the Pneumatic Control Unit and the actuator
with the following "Table 1: Pneumatic connection to actuator".
noTe!
damage or malfunction due to ingress of dirt and moisture!
• To comply with protection class IP65 / IP67, connect the con-
trol air connection which is not required to the free chamber of
the actuator or seal with a plug.
"In rest position" means that the pilot valves of the Pneu-
matic Control Unit Type 8690 are isolated or not actuated.
If the ambient air is humid, a hose can be connected between
pilot air port 2 of the Pneumatic Control Unit and the uncon-
2
nected chamber of the actuator for control function A or control
function B. As a result, the spring chamber of the actuator
is supplied with dry air from the vent duct of the Pneumatic
Control Unit.
Type 8690
Installation
Control function
Process valve closed
a in rest position
(by spring force)
Process valve open
B in rest position
(by spring force)
Process valve closed
in rest position
i
Process valve open
in rest position
Table 1: Pneumatic connection to actuator
english
pneumatic connection type 8690
with actuator
pilot air port actuator input
type 8690
lower chamber of
2
the actuator
1
should be con-
nected to the
2
upper chamber of
2
the actuator
upper chamber of
2
the actuator
1
should be con-
nected to the
2
lower chamber of
2
the actuator
lower chamber of
2
the actuator
1
upper chamber of
2
the actuator
2
upper chamber of
2
the actuator
1
lower chamber of
2
the actuator
2
17