Description
Thermal Transfer AOC-08 Fan-Driven Oil Cooler
The Thermal Transfer AOC-08 is an industrial-duty air-cooled oil cooler designed for the most compact AOC applications and low-flow hydraulic or lubrication circuits. The AOC series combines a copper-tube, aluminum-fin core with 3/4-inch tubes, aluminum turbulators, a washable air filter, and included mounting brackets. It is intended for low-flow oil circuits while the series as a whole supports flows up to 150 GPM.
This product is cataloged under MPN 84941-NM. Confirm the ordered motor, connection, pass, and bypass configuration because the catalog suffix may identify a no-motor or other special configuration.
Why Choose the AOC-08?
- Industrial-duty air-to-oil cooling for lower-flow hydraulic and lubrication systems.
- Standard washable filter helps protect the core from airborne debris and simplifies routine service.
- SAE oil connections are standard, with NPT and BSPP connection options available.
- Single- or three-phase AC motor arrangements are available across the series, depending on model and configuration.
- Optional relief bypass helps manage high pressure drop during cold starts or high-viscosity operation.
Verified Technical Information
| Model | AOC-08 |
| Catalog MPN | 84941-NM |
| Operating Pressure | 300 PSI |
| Test Pressure | 300 PSI |
| Maximum Operating Temperature | 350°F |
| Oil Flow Capability | AOC family supports oil flows up to 150 GPM |
| Core Construction | Copper tubes, aluminum fins, aluminum turbulators |
| Standard Air-Side Protection | Stainless frame with washable filter media |
| Connection Options | SAE standard; NPT or BSPP optional |
Construction and Bypass Options
The AOC-08 uses copper tubes, aluminum fins and turbulators, an aluminum fan blade with steel hub, a steel fan guard and cabinet with baked-enamel finish, and a stainless-frame washable filter. For AOC-08, bypass availability depends on pass arrangement: 30 or 60 PSI for one-pass and 60 PSI for two-pass designs. The bypass is not available with four-pass configurations.
Typical Applications
Common uses include hydraulic power units, machine tools, lubrication systems, gearboxes, industrial drives, test equipment, and other machinery where oil flow is relatively low but stable temperature control is important for viscosity, seal life, and equipment reliability.
Installation and Maintenance Guidance
Mount the AOC-08 securely using the included brackets and provide unobstructed airflow to the filter and core. Avoid recirculating heated discharge air. Support piping independently, confirm inlet and outlet orientation for units with a bypass, and verify the motor voltage and phase before wiring. Inspect and wash the filter as needed, clean the fins without bending them, verify fan operation, and check oil connections for leaks.
How to Confirm the AOC-08 Is the Right Size
Size the cooler from the actual heat load, oil flow, oil viscosity, desired oil temperature, maximum ambient temperature, and allowable pressure drop. Select the number of passes and bypass setting only after checking the appropriate manufacturer performance curve. Moving to a larger AOC model generally increases available airflow and heat-rejection capability, but final selection must be performance-based.
Frequently Asked Questions About the Thermal Transfer AOC-08
What is the AOC-08 designed to cool?
The AOC-08 is designed to cool hydraulic, lubrication, gearbox, and related industrial oils in low-flow systems. It transfers oil heat to ambient air through a finned tube core.
Does the AOC series include an air filter?
Yes. The manufacturer lists a stainless-frame filter with washable media as standard. Keeping the filter clean is important because restricted airflow directly reduces cooling performance.
Can I order NPT or BSPP connections?
Yes. SAE connections are standard, and NPT or BSPP oil connections are listed as options. The exact connection and pass arrangement must match the product configuration being ordered.
When is a relief bypass recommended?
A relief bypass is useful when cold oil, high viscosity, or transient flow can create excessive pressure drop through the cooler. Available settings and serviceability vary by model, so confirm the correct 30 or 60 PSI option.
Can the inlet and outlet be reversed?
On many AOC configurations without a relief bypass, the inlet and outlet ports are reversible. Units with a bypass must be piped in the specified direction so the valve functions correctly.
