Alfa Laval 8693 Anleitung Seite 18

→
Make the pneumatic connection between the positioner /
process controller and actuator with the "Tab. 4: Pneumatic con-
nection to actuator".
noTe!
damage or malfunction due to ingress of dirt and moisture!
• To observe protection class IP65 / IP67 connect the pilot air
outlet which is not required to the free pilot air port of the actua-
tor or seal with a plug.
"In rest position" means that the pilot valves of the positioner
/ process controller are isolated or not actuated.
If the ambient air is humid, a hose can be connected between
pilot air outlet 2 of the positioner and the unconnected pilot air
2
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 positioner / process controller.
18
english
Type 8692, 8693
Installation
control function pneumatic connection type 8692, type
8693 with actuator
pilot air
outlet type
8692, 8693
2
Process valve
1
closed in rest
a
position (by
2
spring force)
2
2
Process valve
1
open in rest
B
position (by
2
spring force)
2
2
Process valve
1
closed in rest
position
2
2
i
2
Process valve
1
open in rest
position
2
2
Tab. 4: Pneumatic connection to actuator
pilot air port actuator
lower pilot air port of the
actuator
should be connected to the
upper pilot air port of the
actuator
upper pilot air port of the
actuator
should be connected to the
lower pilot air port of the
actuator
lower pilot air port of the
actuator
upper pilot air port of the
actuator
upper pilot air port of the
actuator
lower pilot air port of the
actuator