Heat to reject
Required cooling duty, oil inlet target and acceptable working temperature.
Authorised UK Oesse distributor
Oesse hydraulic oil coolers sized for the application
Compare the stocked HL air-oil cooler range, then confirm the heat load, oil and ambient temperatures, flow, voltage, airflow and mounting arrangement.
7 sizesHL510 to HL570
12 / 24 VDCElectrical variants
A / P airflowPulling or pushing fan direction
IP68Documented fan protection
Sizing inputs
Oil flow is only one part of cooler selection
The cooler must reject the system's heat under the real ambient and installation conditions without creating unacceptable pressure drop.
Oil and flow
Flow through the cooler, oil grade, viscosity and expected pressure drop.
Air and installation
Ambient temperature, available airflow, fan direction and mounting space.
Electrical supply
12 VDC or 24 VDC, current demand and control/thermostat strategy.
Duty cycle
Continuous, intermittent and peak loading can change the thermal requirement.
Protection and service
Mounting, vibration isolation, contamination and access for cleaning.
HL Series
Compare the seven base sizes
Scroll sideways to compare all columns →
| Model | Catalogue oil-flow band (L/min) | Mass (kg) | W × H × D (mm) | Oil ports | Fan Ø (mm) | Airflow (m³/h) |
|---|---|---|---|---|---|---|
| HL510 | 10–80 | 3.5 | 270 × 252 × 131 | G3/4 | 190 | 690 |
| HL520 | 10–100 | 4.5 | 270 × 252 × 149 | G3/4 | 190 | 630 |
| HL530 | 20–80 | 5.3 | 335 × 297 × 137 | G3/4 | 225 | 790 |
| HL540 | 20–100 | 7.5 | 350 × 302 × 156 | G1 | 225 | Not stated |
| HL550 | 10–120 | 6.6 | 400 × 362 × 129 | G1 | 280 | 1,500 |
| HL560 | 10–140 | 9.3 | 400 × 362 × 147 | G1 | 280 | 1,350 |
| HL570 | 20–160 | 12.7 | 450 × 407 × 172 | G1 1/4 | 305 | 1,500 |
Catalogue figures are non-binding and the flow band does not prove thermal suitability. HL540 airflow is not stated in the structured source record and has not been invented.
Advisory shortlist
Check which HL flow bands include the requirement
This tool filters the catalogue oil-flow bands only. It cannot calculate heat rejection or confirm a final cooler size.
Starting point
Enter the known oil flow
The result will show every HL base size whose published oil-flow band includes that value, followed by the checks still required.
Variants and accessories
Complete the installation around the cooler
Each HL base size is documented in 12 VDC and 24 VDC forms, with an A pulling/sucking or P pushing/blowing fan direction. The correct direction depends on how air can pass through the installed cooler.
Accessories
Oesse lists bracket and shock-absorber kits, fixed thermostats at 40°C, 50°C, 60°C and 70°C, and a stainless-steel thermostat connector. Confirm the appropriate kit and availability for the chosen model.
Wider Oesse range
Other Oesse cooling products available on enquiry
Beyond the stocked HL focus, we can source Oesse HY driven-fan coolers, HP independent cooling units, HM tank-and-filter heat exchangers for concrete mixers and HA combi-coolers for rotary screw compressors. These ranges are enquiry-only and are not presented as stocked.
Discuss another Oesse rangeTechnical selection note
Published curves show the central range of heat-exchange data and are not a guarantee of performance in every installation. Final selection must account for heat load, oil and ambient temperatures, viscosity, pressure drop, voltage, airflow, mounting and duty. Hydraulic Equipment provides a recommendation and supplies the cooler; installation is not provided directly.
Talk to technical sales
Send the system duty for a cooler recommendation
Useful details include the hydraulic system, oil flow, required heat rejection, oil and ambient temperatures, voltage, airflow direction, mounting space and duty cycle.
Authorised UK Oesse distributor
Oesse hydraulic oil coolers sized for the application
Compare the stocked HL air-oil cooler range, then confirm the heat load, oil and ambient temperatures, flow, voltage, airflow and mounting arrangement.
7 sizesHL510 to HL570
12 / 24 VDCElectrical variants
A / P airflowPulling or pushing fan direction
IP68Documented fan protection
Sizing inputs
Oil flow is only one part of cooler selection
The cooler must reject the system's heat under the real ambient and installation conditions without creating unacceptable pressure drop.
Heat to reject
Required cooling duty, oil inlet target and acceptable working temperature.
Oil and flow
Flow through the cooler, oil grade, viscosity and expected pressure drop.
Air and installation
Ambient temperature, available airflow, fan direction and mounting space.
Electrical supply
12 VDC or 24 VDC, current demand and control/thermostat strategy.
Duty cycle
Continuous, intermittent and peak loading can change the thermal requirement.
Protection and service
Mounting, vibration isolation, contamination and access for cleaning.
HL Series
Compare the seven base sizes
Scroll sideways to compare all columns →
| Model | Catalogue oil-flow band (L/min) | Mass (kg) | W × H × D (mm) | Oil ports | Fan Ø (mm) | Airflow (m³/h) |
|---|---|---|---|---|---|---|
| HL510 | 10–80 | 3.5 | 270 × 252 × 131 | G3/4 | 190 | 690 |
| HL520 | 10–100 | 4.5 | 270 × 252 × 149 | G3/4 | 190 | 630 |
| HL530 | 20–80 | 5.3 | 335 × 297 × 137 | G3/4 | 225 | 790 |
| HL540 | 20–100 | 7.5 | 350 × 302 × 156 | G1 | 225 | Not stated |
| HL550 | 10–120 | 6.6 | 400 × 362 × 129 | G1 | 280 | 1,500 |
| HL560 | 10–140 | 9.3 | 400 × 362 × 147 | G1 | 280 | 1,350 |
| HL570 | 20–160 | 12.7 | 450 × 407 × 172 | G1 1/4 | 305 | 1,500 |
Catalogue figures are non-binding and the flow band does not prove thermal suitability. HL540 airflow is not stated in the structured source record and has not been invented.
Advisory shortlist
Check which HL flow bands include the requirement
This tool filters the catalogue oil-flow bands only. It cannot calculate heat rejection or confirm a final cooler size.
Starting point
Enter the known oil flow
The result will show every HL base size whose published oil-flow band includes that value, followed by the checks still required.
Variants and accessories
Complete the installation around the cooler
Each HL base size is documented in 12 VDC and 24 VDC forms, with an A pulling/sucking or P pushing/blowing fan direction. The correct direction depends on how air can pass through the installed cooler.
Accessories
Oesse lists bracket and shock-absorber kits, fixed thermostats at 40°C, 50°C, 60°C and 70°C, and a stainless-steel thermostat connector. Confirm the appropriate kit and availability for the chosen model.
Wider Oesse range
Other Oesse cooling products available on enquiry
Beyond the stocked HL focus, we can source Oesse HY driven-fan coolers, HP independent cooling units, HM tank-and-filter heat exchangers for concrete mixers and HA combi-coolers for rotary screw compressors. These ranges are enquiry-only and are not presented as stocked.
Discuss another Oesse rangeTechnical selection note
Published curves show the central range of heat-exchange data and are not a guarantee of performance in every installation. Final selection must account for heat load, oil and ambient temperatures, viscosity, pressure drop, voltage, airflow, mounting and duty. Hydraulic Equipment provides a recommendation and supplies the cooler; installation is not provided directly.
Talk to technical sales
Send the system duty for a cooler recommendation
Useful details include the hydraulic system, oil flow, required heat rejection, oil and ambient temperatures, voltage, airflow direction, mounting space and duty cycle.