Function; Control Functions - Burkert 2300 Instructions De Service

Structure and Function
7.2.

function

The seat of the valve is always closed against the medium flow.
Spring force (SFA) or pneumatic control pressure (SFB and SFI)
generates the closing force on the control cone. The force is
transferred via a spindle which is connected to the actuator piston.
7.2.1. control functions
Control function a (sfa)
Closed by spring force in rest position
A
P
Type 2300
Control function B (sfB)
Opened by spring force in rest position
A
P
Control function i (sfi)
Actuating function via reciprocal pressurisation.
A
P
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