Danfoss LFB12 Data sheet
Data Sheet
Loop Flushing Block
LFB12
The Loop Flushing Block is designed to help sustain
high quality working fluid in a hydraulic transmission
circuit. By allowing oil to drain from the power
transmission loop to other oil treatment components,
the LFB12 assists in the process of removing
contamination and cooling oil.
Ports A and B are connected to the work ports of the
main transmission circuit. Port DR is connected to the
transmission case drain return line. Ideally, the return
line would flush through the motor case before
returning to the reservoir.
The low pressure side of the circuit is sent to the relief
valve, which is then drained out of the transmission
loop. The amount of flow drained from the loop can
be determined by adjusting the relief valve setting
and installing an optional orifice. With a wide range of
relief valve settings and orifice sizes, the LFB12 can be
fine-tuned to match the machine’s optimal drain rate.
Features
•
Max pressure: 350 bar [5075 psi]
•
Rated flow: see performance chart
•
Provides loop flushing capabilities at
various flows for a wide range of
applications
•
Optimal flow design
•
Low pressure differential
•
Steel body for high pressure
applications
•
Simple design for ease of serviceability
•
Compact profile for minimal space
requirements
•
Overall size: 156.7 mm x 150 mm x 40
mm
•
Open and closed center spools
Comprehensive technical literature is
online at www.danfoss.com
©
Danfoss | September 2020 AI354779216257en-000101 | 1
0 2 4 6 8 10 12
0
50
100
150
200
250
0
5
10
15
20
0 10 20 30 40 50
Charge pressure minus relief setting
Flow
gpm
lpm
barpsi
None
2. 5mm
3. 0mm
3. 5mm
4. 0mm
4. 5mm 5. 0mm
Data Sheet
Loop flushing block LFB12
Schematics
Closed center spool option
Performance
Pressure rise per orifice option
Open center spool option
2 | © Danfoss | September 2020 AI354779216257en-000101
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