Burkert Type 8691 - Manual (Page 23)

23
Installation
Control function i (CFi)
Process valve closed in rest position
Control head
Pilot air outlet
2
2
2
1
Actuator
Upper pilot air port
Lower pilot air port
Process valve open in rest position
Control head
Pilot air outlet
2
2
2
1
Actuator
Upper pilot air port
Lower pilot air port
Table 2: Pneumatic connection to actuator CFI
"In rest position" means that the pilot valves of the control head Type 8691 are isolated or not actuated.
If the ambient air is humid, a hose can be connected between pilot air outlet 2
2
of the control head 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 control head.
7.4 rotating the actuator module
The actuator module (control head and actuator) can be rotated for straight seat valves and angle seat
valves only.
The position of the connections can be aligned steplessly by rotating the actuator module (control head and actuator)
through 360°.
Process valves Type 2100 and 2101: Only the entire actuator module can be rotated. The control head
cannot be rotated contrary to the actuator.
The process valve must be in the open position for alignment of the actuator module.
Danger!
risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure and deaerate/drain lines.
Procedure:
→
Clamp valve body in a holding device (only required if the process valve has not yet been installed).
→
Control function A: Open process valve.
english
Type 8691