RM Series

• All catalog product is available with short lead-times
• Expert application engineers are available to select and size the right product for your application
• Custom designs are available

It’s a compact, low-cost air-cooled oil cooler from Thermal Transfer Products built for hydraulic case-drain cooling. It mounts on the back of an existing TEFC electric motor and uses the motor’s fan airflow to cool the oil.

In a hydraulic system, pump and motor case drains carry a small, continuous flow of leakage oil that carries away heat. The RM is sized for that low flow, cooling the case-drain oil before it returns to the reservoir — helping control system temperature efficiently.

No. It mounts behind an existing TEFC motor and uses that motor’s cooling fan for airflow, which is what keeps it low-cost and compact.

It lets the cooler align and mate with the electric motor’s fan for proper airflow — specifically on the RM-19 and RM-22 models.

It’s a low-flow design with multiple-pass options as standard, letting you tune heat rejection for your case-drain circuit. Connections are available in SAE, NPT, or metric.

A copper-tube/aluminum-fin core with aluminum turbulators, a steel cabinet with baked-enamel finish, and a washable stainless-frame air filter. (Manifolds and connections are brass on the RM-08, steel on the RM-19 and RM-24.)