16
Structure and function
Type 8792, 8793 REV.2
6.2
Function diagram
6.2.1
Diagram illustrating single-acting actuator
The black lines in “Figure 2” describe the function of the position controller circuit in Type 8792.
The gray part of the diagram indicates the additional function of the superimposed process control circuit in
Type 8793.
* Actuating system
1: Aeration valve
2: Bleed valve
Compressed
air supply
Position
sensor
Process
controller
Positioner
Actuating
system*
1
2
Process
set-point
value
Process
actual
value
Position
set-point
value
Exhaust air
Types 8792/8793
Continuous valve
with single-acting actuator
Sensor
Actual position
Set-point position
Figure 2:
Structure, positioner Type 8792 / process controller Type 8793
The remote variant has the position sensor situated outside the device directly on the continuous
valve and is connected to the latter by a cable.
english
Summary of Contents for 8792
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