Burkert TopControl Basic 8694 REV.2, Quick Start Manual

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7
Structure and function
5 STRUCTURE AND FUNCTION
Positioner
Actuator
Valve body
Ac Valve body = Process valve
Fig. 1: Structure 1
Positioner Type 8694 is an electropneumatic position controller for
pneumatically actuated control valves with single-acting actuators.
Together with the pneumatic actuator, the positioner forms a func -
tional unit.
The control valve systems can be used for a wide range of control
tasks in fluid technology and, depending on the application condi -
tions, different process valves from the Bürkert range can be com -
bined with the positioner. Angle seat valves, straight seat valves,
diaphragm valves or ball valves are suitable.
The position of the actuator is regulated according to the position
set-point value. The nominal position value is specified by an
external standard signal.
Pilot air port
(label: 1)
Exhaust air port
(label: 3)
Pressure limiting valve
Electrical connection
(cable gland or circular
plug-in connector)
DIP Switches
Buttons
Communications interface
LED
Air intake filter
Pilot air outlet only for
series 26xx and 27xx
Additional exhaust air port
(label: 3.1)
only for Type 23xx and 2103
with pilot valve system for high
air flow rate
(actuator size ø 130)
Basic housing
Fig. 2: Structure 2
english
Type 8694 REV. 2