Off-highway mobile machinery OEMs and distributors can choose from six pre-engineered 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 fixed pump circuits
• Over-Pressure Protection / Anti-Cavitation is standard
• Viton O-rings are standard

Family of Fan Drive HICs

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 options available 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
• Reversing function allows you to:
  - Purge (declog) coolers and radiators
  - Prevent overheating
• Automatic cleaning sequence programmed using PLUS+1™:
  - Manual or Automatic activation

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 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

Product Documents and Downloads

Fan Drive HIC's Catalog

1806 kB

09-28-2015