Function - Burkert 2300 Manuel D'utilisation

6.2

function

The seat of the valve is always closed against the medium flow.
Spring force (CFA) or pneumatic pilot pressure (CFB and CFI) gen-
erates the closing force on the control cone. The force is transferred
via a spindle which is connected to the actuator piston.
6.2.1 control functions (cf)
Warning!
for control function i – danger if pilot pressure fails!
For control function I control and resetting occur pneumatically.
If the pressure fails, no defined position is reached.
▶ To ensure a controlled restart, first pressurize the device with
pilot pressure, then switch on the medium.
control function a (cfa)
Normally closed by spring action.
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english
Type 2300
Structure and function
control function B (cfB)
Normally open by spring action.
control function i (cfi)
Actuating function via reciprocal pressurization.