Flow Direction - Burkert 2101 Manuel D'utilisation

8.3

Flow direction

CFA SFB/SFI
Flow direction below seat
(closing against medium)
Fig. 8: Flow direction below seat
CFA
Flow direction above the seat
(closing with the medium)
Fig. 9: Flow direction above the seat
8.3.1 Flow direction above the seat
Control function A, CFA: closes with the medium flow via spring
force. The medium pressure supports the closing and sealing of
the valve seat. The valve opens via pilot pressure.
16
Marking on the
housing
1 2
Flow direction
Marking on the
housing
1 2
Flow direction
English
Type 2101
Start-up
WARNING!
Risk of injury due to bursting lines and device!
▶ Use valves with flow direction above the seat for gaseous
media and vapour only.
In order to ensure complete opening, the minimum pilot
pressure must be used!
8.3.2 Flow direction below seat
Control function A, CFA: closes against the medium flow via spring
force. Control function B, CFB: closes against the medium flow
via pilot pressure. The medium pressure aids in opening the valve.
WARNING!
Valve leak if there is too little minimum pilot pressure (for CFB
and CFI) or excessive medium pressure!
▶ Note the minimum pilot pressure and medium pressure (see
"6.4.2 Pressure ranges").
8.4 Start-up
Perform the Teach function after installing the device. This function
presets the closed-loop control parameters.
See control unit operating instructions for a description.