Burkert Type 2002 - Manual (Page 11)

11
StructureandFunction
flow modes of operation
c
In rest position pressure connection 1
closed, working connection 2 relieved.
d
In rest position pressure connection 3
connected to working connection 2,
relief 1 closed.
e
Mixing valve
In rest position pressure connection 3
connected to working connection 2,
pressure connection 1 closed.
f
Distribution valve
In rest position pressure connection 2
connected to working connection 3,
working connection 1 closed.
Tab. 4: Type 2001 - flow modes of operation
6.2.3. incoming flow below seat
Depending on the version, the valve is closed against the medium
flow by spring force (control function A, CFA) or by control pressure
(control function B, CFB).
As the medium pressure is under the swivel plate, this pressure
contributes to the opening of the valve.
Warning!
leaking seat if minimum control pressure is too low or
medium pressure too high!
If the minimum control pressure is too low for CFB and CFI or the
permitted medium pressure is exceeded, the seat may leak.
• Observe minimum control pressure.
• Do not exceed medium pressure.
• See chapter „7.5.2. Pressure ranges“.
CFA/CFI CFB/CFI
Fig. 4: Incoming flow below seat (closing against medium)
english
Type 2000/2002