Burkert Type 8690 - Manual (Page 17)

17
Installation
→
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 “Tab. 1: Pneumatic connection to actuator”.
noTe!
damage or malfunction due to ingress of dirt and moisture.
▶ To comply with degree of protection IP65 / IP67, connect the
pilot air aoutlet which is not required to the free pilot air port 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 outlet 2
2
of the Pneumatic Control Unit and the
unconnected pilot air port 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.
control function pneumatic connection type 8690
with actuator
pilot air outlet
type
8690
pilot air port
actuator
a
Process valve closed
in rest position
(by spring force)
2
1
lower pilot air port
of the actuator
2
2
should be con-
nected to the
upper pilot air port
of the actuator
B
Process valve open
in rest position
(by spring force)
2
1
upper pilot air port
of the actuator
2
2
should be con-
nected to the
lower pilot air port
of the actuator
i
Process valve closed
in rest position
2
1
lower pilot air port
of the actuator
2
2
upper pilot air port
of the actuator
Process valve open
in rest position
2
1
upper pilot air port
of the actuator
2
2
lower pilot air port
of the actuator
Tab. 1: Pneumatic connection to actuator
english
Type 8690