Fan Drive HIC Technical Information
P108 319E
A
B
GP
T
P108 311E
GT
GP
T
Quick Reference
Fan Drive HICs Model No. Description Flow Pressure Page
RFDE-40-000 Fan Drive HIC with
Reversing Control
10 - 40 l/min
[2.6 - 10.5 US gal/min]
210 bar
[3000 psi]
FD - 5
RFDE-80-000 20 - 80 l/min
[5.3 - 21.1 US gal/min]
Fan Drive HICs Model No. Description Flow Pressure Page
RFD-120-000 Fan Drive HIC with
A
Reversing Control
Up to 120 l/min
[31.7 US gal/min]
See performance chart
210 bar
[3000 psi]
210 bar
[3000 psi]
FD - 5
FD - 7
P
B
Fan Drive HICs Model No. Description Flow Pressure Page
RFDE-40-PRV Fan Drive HIC with
Proportional and
Reversing Control
RFDE-80-PRV 20 - 80 l/min
10 - 40 l/min
[2.6 - 10.5 US gal/min]
[5.3 - 21.1 US gal/min]
210 bar
[3000 psi]
210 bar
[3000 psi]
FD - 9
FD - 9
Fan Drive HICs Model No. Description Flow Pressure Page
RFD-120-PRV Fan Drive HIC with
Proportional and
Reversing Control
P
Up to 120 l/min
[31.7 US gal/min]
See performance chart
210 bar
[3000 psi]
FD - 11
BC332376063114en-000101 • February 2020
GT
FD - 1
Fan Drive HIC Technical Information
Application notes
OVERVIEW
Variable pump fan drive circuits:
- Provide reversing control and over-
pressure protection/anti-cavitation
Fixed pump fan drive circuits:
- Provide modulating and reversing
control with over-pressure protection/
anti-cavitation
O-highway mobile machinery OEMs and distributors can choose from six preengineered Hydraulic Integrated Circuits (HICs) designed to provide speed control and
reversing for hydraulic modulating fan drive motors in open circuit hydraulic fan drive
systems. The program includes:
• 40, 80, and 120 LPM Frame Sizes
• Variable piston pump or xed pump circuits
• Over-Pressure Protection / Anti-Cavitation is standard
• Viton O-rings are standard
40 & 80 LPM 120 LPM
RFDE-40-000 & RFDE-80-000 RFD-120-000
RFDE-40-PRV & RFDE-80-PRV RFD-120-PRV
Functions
• Proportional relief valve:
– Regulates fan speed by controlling pressure drop across fan motor
– Normally closed to ensure full fan speed in the absence of electrical signal
– PLUS+1® compliant
• Piloted directional control valve:
– Reverses ow to the fan motor to reverse fan direction
– Open transition spool reduces pressure spikes during reversals
– Sized to minimize parasitic losses due to pressure drop
• Dual shock valve with anti-cavitation checks:
– Trims the maximum motor torque by absorbing pressure spikes (shock eects) at
the work ports
– Anti-cavitation feature allows additional ow to the motor through the tank port
when motor overruns the pump
– PVLP shock valves (from PVG) allow for a compact design
• Custom designs available upon request
BC332376063114en-000101 • February 2020
FD - 2
Circuits - Variable Pump
or Fixed Pump
Fan Drive HIC Technical Information
Application notes
RFDE-40-000, RFDE-80-000 & RFD-120-000
• Variable Pump fan drive circuits
• HIC provides reversing control and over-pressure
protection/anti-cavitation
• Variable pump provides modulation (speed
control)
Features
• Proportional Fan Speed Control:
– Electronically match fan speed with cooling demand
– Conserve engine power and fuel for the majority of operating conditions - as
compared to non-proportional systems
• Increased design exibility:
– The compact HIC valve can be placed in the most suitable location on the machine
– Minimize fan system pressure losses when choosing the optimal fan drive HIC size
for the application
– Internal and external reversing pilot options available (40 LPM & 80 LPM )
– Drain port included on all models for motor case drain
– Robust IP69K Deutsch coil standard for all three sizes
• Increased productivity:
– Fan is reversible to purge (de-clog) coolers and radiators
– Prevents overheating with purged cooler
– More power available for useful work when radiator is not clogged
RFDE-40-PRV, RFDE-80-PRV & RFD-120-PRV
• Fixed Pump fan drive circuits
• HIC provides modulating and reversing control with
over-pressure protection/anti-cavitation
BC332376063114en-000101 • February 2020
FD - 3
Fan Drive HIC Technical Information
Application notes
Features (continued)
• Automatic cleaning sequence programmed using PLUS+1™:
– Manual or automatic activation
– Reference Danfoss Power Solutions ‘Fan Drive Application Block’ information
• Custom designs available upon request
Service screen below illustrates an example reversing fan drive software setup
BC332376063114en-000101 • February 2020
FD - 4
Fan Drive HIC Technical Information
Reversing Control
RFDE-40-000 & RFDE-80-000
OPERATION
This HIC reverses ow to the fan motor to reverse fan direction. It includes
a DV15-P5-FD open transition spool valve to reduce pressure spikes during
reversals. Internal and external piloting options are available. The HIC trims
the maximum motor torque by absorbing pressure spikes at the work ports.
An anti-cavitation feature allows additional ow to the motor when the
motor over-runs the pump.
APPLICATIONS
This HIC can be used for fan reversal in circuits using a variable pump.
Use this HIC for mobile equipment such as wheel loaders for purging
(de-clogging) coolers and radiators to prevent overheating and increase
cooling system efficiency. A drain port is included for motor case drain.
SPECIFICATIONS
Rated pressure 210 bar [3045 psi]
Flow range - RFDE-40-000
Flow range - RFDE-80-000
Weight 3.8 kg [8.37 lb]
Valves DV15-P5-24-FD, SVP08-NC, PVLP
Minimum shift pressure 2 bar [29 psi]
Robust Coil (Standard) R13 16 Watt (IP69K)
Diode (Optional) Bi-directional
10 - 40 l/min
[2.6 - 10.5 US gal/min]
20 - 80 l/min
[5.3 - 21.1 US gal/min]
PERFORMANCE CURVE
SCHEMATICS
BC332376063114en-000101 • February 2020
FD - 5
Fan Drive HIC Technical Information
Reversing Control
RFDE-40-000 & RFDE-80-000
DIMENSION DRAWING
EXAMPLE CIRCUITS
Internal Pilot (00) External Pilot (E)
Dimensions mm [in]
ORDERING
INFORMATION
BC332376063114en-000101 • February 2020
FD - 6
Fan Drive HIC Technical Information
Pressure drop
Reversing Control
RFD-120-000
OPERATION
The RFD-120-000 reverses ow to the fan motor to reverse fan direction. It
includes open transition spools in the directional valves to reduce pressure
spikes during reversals. This HIC trims the maximum motor torque by
absorbing pressure spikes at the work ports. An anti-cavitation feature
allows additional ow to the motor when the motor over-runs the pump.
APPLICATIONS
The RFD-120-000 can be used for fan reversal in circuits using a variable
pump. Use this HIC for applications requiring up to 120 LPM (31.6
GPM) including mobile equipment such as wheel loaders for purging
(de-clogging) coolers and radiators to prevent overheating and increase
cooling system efficiency.
SPECIFICATIONS
Rated pressure 210 bar [3045 psi]
Flow
Weight 4.26 kg [9.40 lb]
Valves CP722-5, SV08-24-01, PVLP
Robust Coil R13 16 Watt (IP69K)
Diode (Optional) Bi-directional
Up to 120 l/min
[31.7 US gal/min]
See performance chart
PERFORMANCE CURVE
33 cSt[154 SUS] hyd.oil@38° C[100° F]
P-A-B-T, P-B-A-T
203
174
145
116
barpsi
14
12
10
8
SCHEMATIC
6
87
4
58
2
29
0
0
0102030405060708090 100 110 120
l/min
gal/min
0 2.6 5.3 7.9 10.6 13.2 15.9 18.4 21.1 23.7 26.4 29.1 31.7
BC332376063114en-000101 • February 2020
FD - 7
Fan Drive HIC Technical Information
122.4
Reversing Control
RFD-120-000
DIMENSION DRAWING
11.0
86.0
[0.43]
[3.39]
9.0
[0.35]
100.8
[3.97]
43.0
[1.69]
127.0
[5.00]
EXAMPLE CIRCUITS
109.0
[4.29]
26.7
[1.05]
[2.87]
73.0
10.3 [.406]
THRU
TYPICAL
4 PLACES
[4.82]
APPROX
108.0
[4.25]
86.0
[3.39]
11.0
[0.43]
9.0
[0.35]
90.0
[3.54]
108.0
[4.25]
82.8
[3.26]
164.1
[6.46]
APPROX
Dimensions mm [in]
70.0
[2.76]
31.0
[1.22]
161.5
[6.36]
APPROX
ORDERING
INFORMATION
BC332376063114en-000101 • February 2020
FD - 8
Fan Drive HIC Technical Information
Proportional and Reversing Control
RFDE-40-PRV & RFDE-80-PRV
OPERATION
This HIC regulates fan speed by controlling pressure drop across the fan motor. It
operates in a normally closed conguration in the absence of an electrical signal. The HIC
reverses ow to the fan motor to reverse fan direction. It includes a DV15-P5-FD open
transition spool valve to reduce pressure spikes during reversals. Internal and external
piloting options are available. This HICs trims the maximum motor torque by absorbing
pressure spikes at the work ports. An anti-cavitation feature allows additional ow to the
motor when the motor over-runs the pump.
APPLICATIONS
This HIC includes an integrated proportional relief valve to modulate
fan speed in circuits using a fixed pump. It can also be used for fan
reversal. Use this HIC for mobile equipment such as wheel loaders for
purging (de-clogging) coolers and radiators to prevent overheating
and increase cooling system efficiency. A drain port is included for
motor case drain.
SCHEMATICS
SPECIFICATIONS
Rated pressure 210 bar [3045 psi]
Flow range - RFDE-40-PRV
Flow range - RFDE-80-PRV
Weight 4.0 kg [9.0 lb]
Valves DV15-P5-24-FD, SVP08-NC, PRV10-IS2, PVLP
Minimum pilot pressure 2 bar [29 psi]
Robust Coil (Standard) R13 16 Watt (IP69K)
Diode (Optional) Bi-directional (Not available with PRV10-IS2)
10 - 40 l/min
[2.6 - 10.5 US gal/min]
20 - 80 l/min
[5.3 - 21.1 US gal/min]
M19P 22 Watt [IS2] (IP69K)
PERFORMANCE CURVES
BC332376063114en-000101 • February 2020
FD - 9
Fan Drive HIC Technical Information
Proportional and Reversing Control
RFDE-40-PRV & RFDE-80-PRV
DIMENSION DRAWING
EXAMPLE CIRCUITS
Internal Pilot (00) External Pilot (E)
Dimensions mm [in]
ORDERING
INFORMATION
CAV:
PRV replaced
by cavity
plug.
BC332376063114en-000101 • February 2020
NP
No Setting (CAV option only)
FD - 10
Fan Drive HIC Technical Information
Pressure drop
0 2.6 5.3 7.9 10.6 13.2 15.9 18.4 21.1 23.7 26.4 29.1 31.7
116
145
174
203
Pressure
n
gal/min
Bypass o
w
∆
Pressure drop
Proportional and Reversing Control
RFD-120-PRV
OPERATION
The RFD-120-PRV regulates fan speed by controlling pressure drop across the fan
motor. It operates in a normally closed conguration in the absence of an electrical
signal. This HIC reverses ow to the fan motor to reverse fan direction. It includes open
transition spools in the directional valves to reduce pressure spikes during reversals.
The RFD-120-PRV trims the maximum motor torque by absorbing pressure spikes at
the work ports. An anti-cavitation feature allows additional ow to the motor when the
motor over-runs the pump.
APPLICATIONS
The RFD-120-PRV includes an integrated proportional relief valve to
modulate fan speed in circuits using a fixed pump. It can also be used for
fan reversal. Use this HIC for mobile equipment for applications requiring
up to 120 LPM (31.6 GPM) such as wheel loaders for purging (de-clogging)
coolers and radiators to prevent overheating and increase cooling system
efficiency.
SPECIFICATIONS
Rated pressure 210 bar [3045 psi]
Flow
Weight 15.7 kg [6.93 lb]
Valves CP722-5, SV08-24-01, PRV12-IS2, PVLP
Robust Coil (Standard) R13 16 Watt (IP69K)
Diode (Optional)
Up to 120 l/min
[31.7 US gal/min]
See performance chart
Bi-directional (Not available with PRV12-IS2)
M19P 22 Watt [IS2] (IP69K)
SCHEMATIC
PERFORMANCE CURVES
barpsi
14
12
10
8
6
87
4
58
2
29
0
0
l/min
gal/min
33 cSt[154 SUS] hyd.oil@38° C[100° F]
0102030405060708090 100 110 120
BC332376063114en-000101 • February 2020
P-A-B-T, P-B-A-T
psi
30 0
4000
25 0
3000
20 0
150
2000
100
1000
0
33 cSt[154 SUS] hyd.oil@38°
bar
50
0
04 08 01 20 160
412168
C[100° F]
W
U
S
R
Q
O
M
I
F
0
20
l/mi
FD - 11
Fan Drive HIC Technical Information
X
Proportional and Reversing Control
RFD-120-PRV
DIMENSION DRAWING
11.0
103.0
[0.43]
[4.06]
9.0
[0.35]
113.6
[4.47]
55.7
[2.19]
139.7
[5.50]
EXAMPLE CIRCUITS
121.7
[4.79]
26.8
[1.05]
90.0
[3.54]
10.3 [.406]
THRU
TYPICAL
4 PLACES
129.4
[5.09]
APPROX
125.0
[4.92]
103.0
[4.06]
11.0
[0.43]
9.0
[0.35]
107.0
[4.21]
125.0
[4.92]
100.0
[3.94]
176.8
[6.96]
APPROX
Dimensions mm [in]
82.7
[3.26]
31.0
[1.22]
223.6
[8.80]
APPRO
ORDERING
INFORMATION
BC332376063114en-000101 • February 2020
1160
2103
2393
2756
2973
FD - 12
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