6
In Type 0263 the actuator is hermetically sealed from the medium
by a diaphragm.
Control diaphragm
Spring plate
Lip seal
Diaphragm
Body
Fig. 2: Structure of Type 0263
5.2 function
Spring force (CFA) or pneumatic control pressure (CFB and CFI)
generates the closing force on the seat seal or diaphragm. The
force is transferred via a spindle which is connected to the control
diaphragm.
5.2.1 control function
Control function (CF)
CFA
P
A
Closed by spring force in rest
position
CFB
P
A
Opened by spring force in rest
position
CFI
P
A
Actuating function via reciprocal
pressurization
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