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Hydrostatic Fan Drives
Fan Drive, Hydro-Mechanically Controlled with Gear Pump and Gear Motor
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Hydrostatic fan drives with gear pump and gear motor with integrated priority valve use a thermal relief valve to control the hydraulic pressure.
When using a system with variable pump, the thermal relief valve controls the pump’s pressure controller, which can be remote-controlled.
This guarantees that there is always pressure and flow at the fan motor, which are required for cooling the combustion engine using the air flow.
The priority valve can direct any available excess flow to other hydraulic functions.
Advantages
- Small overall length of pump
- Favorable price / performance ratio
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Advantages with Variable Pump
- Pump output power is in relation to required fan drive power
- Fan speed independent of engine speed
- Required power is only dependent on coolant temperature
- No hydraulic losses
The thermal pilot relief valve features:
- Simple design
- Favorable price / performance ratio
- Good temperature control with fluids
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Relevant links for Fan Drives
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