Combination With Valve Types And Mounting Versions - Burkert 8792 Operating Instructions Manual

Types 8792, 8793
Description of System
• Optional.
Remote version for DIN rail mounting or for mounting bracket
5.1.2. combination with valve types and mounting versions
The positioner Types 8792 / 8793 can be mounted on different proportional valves. For example on valves with
piston, membrane or rotary actuator. The actuators can be single-acting or double-acting.
• For single-acting actuators, only one chamber is aerated and deaerated during actuation. The generated
pressure works against a spring. The piston moves until there is an equilibrium of forces between compressive
force and spring force. To do this, one of the two air connections must be sealed with a threaded plug.
• For double-acting actuators the chambers on both sides of the piston are pressurised. In this case, one
chamber is aerated when the other one is deaerated and vice versa. In this design, no spring is installed in the
actuator.
Two basic device versions are offered for the positioner Type 8792 / 8793; they differ in the attachment option
and in the position measuring system.
Device.version.1:
An internal position measuring system is used which is designed as a rotary potentiometer. The positioner is
attached directly to the actuator.
Device.version.2:.
An external position measuring system (linear or rotative) via a digital interface. The positioner is attached to a wall
either with a DIN rail or with a mounting bracket (remote design).
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