Fan Drive HIC Technical Information
Quick Reference
Fan Drive HICs |
Model No. |
Description |
Flow |
Pressure |
Page |
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RFDE-40-000 |
Fan Drive HIC with |
10 |
- 40 l/min |
210 bar |
FD - 5 |
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Reversing Control |
[2.6 - 10.5 US gal/min] |
[3000 psi] |
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RFDE-80-000 |
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20 |
- |
80 l/min |
210 bar |
FD - 5 |
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[5.3 |
- 21.1 US gal/min] |
[3000 psi] |
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Fan Drive HICs |
Model No. |
Description |
Flow |
Pressure |
Page |
GP |
RFD-120-000 |
Fan Drive HIC with |
Up to 120 l/min |
210 bar |
FD - 7 |
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A |
Reversing Control |
[31.7 US gal/min] |
[3000 psi] |
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See performance chart |
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P |
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T |
B |
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GT |
P108 311E |
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Fan Drive HICs |
Model No. |
Description |
Flow |
Pressure |
Page |
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RFDE-40-PRV |
Fan Drive HIC with |
10 - 40 l/min |
210 bar |
FD - 9 |
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Proportional and |
[2.6 - 10.5 US gal/min] |
[3000 psi] |
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Reversing Control |
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RFDE-80-PRV |
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20 - 80 l/min |
210 bar |
FD - 9 |
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[5.3 - 21.1 US gal/min] |
[3000 psi] |
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Fan Drive HICs |
Model No. |
Description |
Flow |
Pressure |
Page |
GP |
RFD-120-PRV |
Fan Drive HIC with |
Up to 120 l/min |
210 bar |
FD - 11 |
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A |
Proportional and |
[31.7 US gal/min] |
[3000 psi] |
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Reversing Control |
See performance chart |
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P |
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T |
B |
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GT |
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P108 319E |
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BC332376063114en-000101 • February 2020 |
FD - 1 |
Fan Drive HIC Technical Information
Application notes
OVERVIEW |
Off-highway mobile machinery OEMs and distributors can choose from six pre- |
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engineered Hydraulic Integrated Circuits (HICs) designed to provide speed control and |
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reversing for hydraulic modulating fan drive motors in open circuit hydraulic fan drive |
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systems. The program includes: |
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• 40, 80, and 120 LPM Frame Sizes |
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• Variable piston pump or fixed pump circuits |
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• Over-Pressure Protection / Anti-Cavitation is standard |
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• Viton O-rings are standard |
40 & 80 LPM |
120 LPM |
RFDE-40-000 & RFDE-80-000 |
RFD-120-000 |
Variable pump fan drive circuits:
- Provide reversing control and overpressure protection/anti-cavitation
Fixed pump fan drive circuits:
- Provide modulating and reversing control with over-pressure protection/ anti-cavitation
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RFDE-40-PRV & RFDE-80-PRV |
RFD-120-PRV |
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Functions |
• Proportional relief valve: |
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––Regulates fan speed by controlling pressure drop across fan motor |
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––Normally closed to ensure full fan speed in the absence of electrical signal |
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––PLUS+1® compliant |
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•Piloted directional control valve:
––Reverses flow 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 effects) at
the work ports
––Anti-cavitation feature allows additional flow 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 |
Fan Drive HIC Technical Information
Application notes
Circuits - Variable Pump or Fixed Pump
RFDE-40-000, RFDE-80-000 & RFD-120-000 |
RFDE-40-PRV, RFDE-80-PRV & RFD-120-PRV |
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Variable Pump fan drive circuits |
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Fixed Pump fan drive circuits |
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HIC provides reversing control and over-pressure |
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HIC provides modulating and reversing control with |
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protection/anti-cavitation |
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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 flexibility:
––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
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 |
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