Burkert 2301 - Flow Direction Below Seat

11
Structure and function
Control functionB (CFB)
Openedbyspringforceinrestposition
Control functionI (CFI)
Actuatingfunctionviareciprocal
pressurisation.
6.2.2 Flow direction below seat
Dependingonthevariant,thevalveisclosedagainstthemedium
oweitherwithspringforce(CFA)orpilotpressure(CFBorCFI).
Becausethemediumpressureisbelowthecontrolcone,ithelps
openthevalve.
WARNING!
Valve seat leak if there is too little minimum pilot pressure or
high medium pressure.
MinimumpilotpressureforCFBandCFIthatistoolow,or
failingtomeetthepermittedmediumpressure,cancausea
leakinthevalveseat.
▶ Adheretominimumpilotpressure.
▶ Donotexceedthemediumpressure.
▶ Seechapter“7.4.4Pressureranges”.
Flow direction
1 2
Markingonthe
housing
Rest
position
CFA
Rest
position
CFB/CFI
Fig.2: Flowdirectionbelowseat(closingagainstmedium)
Type2301
English