Bürkert 8791, Operating Instructions Manual

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16
Function
funcTiOn 7.
function diagram 7.1.
Diagram illustrating single-acting actuator
* Control system
1: Aeration valve
2: Bleed valve
Compressed-air
supply
Position
measuring
system
Position
controller
Control
system
*
1
2
Position set-
point value
Exhaust air
positioner type 8791
control valve with
single-acting actuator
Actual position
Function diagram, positioner type 8791 Fig. 2:
The remote design has the position measuring system situated outside the positioner directly on the pro-
portional valve and is connected to the latter by a cable.
english
Type 8791