Burkert 8692 - Type 8692 Positioner with Position Controller

18
Type 8692, 8693
english
Description of System
2.3 Function diagram of the positioner with single-acting actuator
The black lines describe the function of the position controller (Type 8692). The process controller (Type 8693) includes the
position controller and the functions which are illustrated in grey.
Control
system
1
2
Position
controller
Process
controller
Nominal
position
Control system
1: Aeriation valve
2: Bleed valve
Compressed-air
supply
Exhaust air
Position
measuring
system
Actual
position
Process set-
point value
external-
position
set-point
value
Positioner
Pneumatic
actuator
(single-acting)
Valve
(actuator)
Sensor
Process actual value
(flow, pressure, level,
temperature, etc.)
Process actual value
Fig. 3: Function diagram