Burkert Type 2105 - Manual (Page 10)

10
Structureandfunction
6.1.3 Tank bottom valve type 2105
Transparent cap with
position indicator
Actuator body
Actuator cover
Tank bottom valve with
welding flange
Mechanical interface
Diaphragm socket
Second pilot air port for CFI
and air discharge connection for CFA and CFB
Pilot air port for CFA, CFB, CFI
2
1
Fig. 3: Structure and description type 2105
6.2 function
Spring force (CFA) or pneumatic pilot pressure (CFB and CFI)
generates the closing force on the diaphragm pressure piece. The
force is transferred via a spindle which is connected to the actuator
piston.
6.2.1 control functions (cf)
control function a (cfa)
Normally closed by spring action
control function B (cfB)
Normally open by spring action
english
Type 2103, 2104, 2105