Burkert 8693 - Features of the valve types

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Type 8692, 8693
english
Description of System
1 FUNCTION OF THE POSITIONER
AND COMBINATION WITH VALVE TYPES
Positioners Type 8692 and Type 8693 are electropneumatic positioner for pneumatically actuated control valves with single-
acting or double-acting actuators.
Together with the pneumatic actuator the positioner forms an optical and functional unit.
The control valve systems can be used for a wide range of control tasks in fluid technology and, depending on the application
conditions, different process valves belonging to series 2300 or 2103 from the Bürkert range can be combined with the posi-
tioner. Angle-seat valves, diaphragm valves or ball valves fitted with a control cone are suitable.
Fig. 1 shows an overview of the possible combinations of positioner and different pneumatically actuated valves. Different actua-
tor sizes and valve nominal widths, not illustrated here, are available for each type. More precise specifications can be found on
the respective data sheets. The product range is being continuously expanded.
Positioner
Type 8692
Type 8693
with slanted seat valve
Type 2300
with diaphragm valve
Type 2103
Fig. 1: Overview of possible combinations
1.1 Models of the positioner
The positioner is available in 2 versions:
Type 8692 - Positioner with positioning control
The position of the actuator (stroke) is regulated according to the position set-point value. The position set-point value is speci-
fied by an external uniform signal (or via field bus).
Type 8693 - Positioner with process control
The positioner is linked to a control circuit. The position set-point value of the valve is calculated from the process set-point
value and the actual process value via the control parameters (PID controller). The process set-point value can be set by an
external signal.