Burkert Type 2037 - Manual (Page 21)

21
StructureandFunction
7.1.4 y-valve Type 2037
Transparent cap with
position indicator
Actuator cover
Upper control air connection
(for CFB and CFI)
Lower control air connection
(for CFA and CFI)
Diaphragm socket
Y-valve body
Actuator body
Port connection
Fig. 23: Structure and description Type 2037
7.2 function
Spring force (CFA) or pneumatic control pressure (CFB and CFI) gen-
erates the closing force on the diaphragm pressure piece. The force
is transferred via a spindle which is connected to the actuator piston
and the valve is opened and closed.
7.2.1 control functions
control function a (cfa)
Closed by spring force in rest position A
P
control function B (cfB)
Opened by spring force in rest position B
P
control function i (cfi)
Double-acting actuator without spring
P
A
english
Type 2030, 2031, 2031 K, 2032,
2033, 2037