Reservoir-Mounted Finned-Tube Oil Cooler — Tank-Flange “Green Cooler”

The Thermal Transfer Products EKT Series is a reservoir-mounted, water-cooled finned-tube oil cooler for hydraulic power units. It’s a tank-flange version of the EK “Green Cooler” — the finned-tube bundle mounts through a flange directly into the hydraulic reservoir, so the cooler sits inside the tank instead of in an external cooling line. That eliminates external plumbing and mounting hardware, saves space, and simplifies integration into the hydraulic power unit.

Like the rest of the Green Cooler family, its aluminum finned-tube bundle provides increased surface area for high heat rejection while using less cooling water than a conventional bare-tube exchanger — a cost- and water-saving advantage where cooling water is limited or expensive. An optional Surge-Cushion^® bypass protects the core during cold starts and flow surges when cold, high-viscosity oil or sudden flow spikes would otherwise stress it.

Because the bundle is immersed in the reservoir, the EKT is rated for a lower shell-side pressure than the in-line EK — a maximum working shell pressure of 75 PSI, tube pressure of 150 PSI, and maximum operating temperature of 250°F. TTP’s XSelector^® sizing program — available online and as a mobile app — helps select the right model for your reservoir, oil flow, and cooling-water conditions.

Consult catalog for additional sizes and technical information.

High-Capacity Finned-Tube Shell & Tube Oil Cooler — Water-Saving “Green Cooler”

The Thermal Transfer Products EC Series — the “Green Cooler” — is a high-capacity, water-cooled finned-tube shell and tube heat exchanger for hydraulic oil cooling. It’s the larger, higher-performance version of the EK Series, sharing the same finned-tube bundle core design but scaled up to handle flows up to 250 GPM for demanding, high-flow applications.

Its defining advantage is water efficiency: the aluminum finned-tube bundle adds substantial surface area, so the EC achieves high heat rejection while consuming far less cooling water than a conventional bare-tube shell and tube exchanger. That makes it an environmentally responsible, cost-saving choice wherever cooling water is metered, limited, or expensive — the reason it’s branded the Green Cooler.

An optional Surge-Cushion^® bypass protects the core during cold starts and flow surges, and multiple material options let the EC serve a wide variety of applications, including sea water service. Maximum operating pressure is 300 PSI on the shell side. TTP’s XSelector^® sizing program — available online and as a mobile app — helps select the right model for your oil flow, heat load, and cooling-water conditions.

Consult catalog for additional sizes and technical information.

Water-Cooled Off-Line Fluid Conditioning System — Cooling & Filtration with Integral Pump

The Thermal Transfer Products COLW Series is a water-cooled off-line fluid conditioning system for independent cooling and filtering of hydraulic and lube system oils. It runs as a self-contained loop — often called an off-line or “kidney loop” conditioning circuit — driven by reliable, high-performing, low-noise screw pump technology, so it conditions the reservoir continuously without depending on the main system’s flow.

High efficiency comes from its EK Series finned-tube shell & tube heat exchanger, whose extended aluminum finned-tube surface area achieves strong heat rejection while minimizing cooling-water consumption — an advantage for water-conscious and environmentally responsible operations. This makes the COLW well suited to large hydraulic power units, lube systems, and gearboxes where oil temperature and cleanliness must stay tightly controlled and a cooling-water supply is available.

Each package integrates the pump, motor, EK shell & tube exchanger, and optional filtration on one unit. Options include cartridge-style in-line filters for contamination control and thermostat temperature sensors for automatic control. Connections are standard SAE ports, with NPT and BSP port adapters available. TTP’s XSelector^® sizing program — available online and as a mobile app — helps configure and size the right package for your reservoir volume, heat load, and filtration needs.

Consult catalog for additional sizes and technical information.

Large High-Flow Shell & Tube Heat Exchanger — Water-to-Oil Cooling

The Thermal Transfer Products CA Series is a bare-bundle, fixed-tubesheet shell and tube heat exchanger for water-to-oil cooling of hydraulic systems. Its proven, highly standardized design delivers cost-effective, long-term reliability while still accommodating a wide range of options and multiple material choices for application-specific requirements.

The CA-2000 Series is the largest standard shell and tube heat exchanger in the entire TTP product line. Built with rugged steel construction, it handles very high flow rates and heat-transfer loads at a competitive price, and it can cool oil, water, glycol, and other fluids. It’s offered with 3/8″ or 5/8″ tubes, up to a 10″ shell diameter and 12-foot length, with 150# ANSI/ASME flanged shell connections (metric available), removable end bonnets for servicing, and saddle brackets for mounting. Custom designs, ASME code stamping, and special ASME/TEMA C/CM ratings are available.

For corrosive or marine service, 90/10 copper-nickel tubing and tubesheets, electroless-nickel-plated bonnets, and zinc anodes are available for sea water applications. Maximum working pressure is 150 PSI on both the shell and tube sides, with a maximum operating temperature of 300°F. TTP’s XSelector^® sizing program helps select the right model for your flow, heat load, and cooling-water conditions.

Consult catalog for additional sizes and technical information.

Made-to-Order Brazed Plate Heat Exchanger — Custom Sizes, Ports & Materials

The Thermal Transfer Products BPW Series is a made-to-order brazed plate heat exchanger for high-efficiency liquid cooling, engineered to your specific application. Where the standard BPSW Series offers a fixed range of off-the-shelf models, the BPW is the build-to-order version — you specify the plate size, number of plates, port configuration, and material options to match your exact flow, heat load, and approach temperature.

Like all of TTP’s brazed plate exchangers, it’s rugged, compact, and cost-effective, running reliably over long service periods with minimal maintenance. High plate-channel turbulence drives efficient heat transfer and lets the BPW perform effectively even at close approach temperatures, where the two fluid temperatures are near each other and cooling is hardest to achieve. The turbulent flow also resists scaling and fouling. Standard construction uses 316 stainless steel plates and connectors with a copper braze (nickel braze optional for deionized water, ammonia, or other aggressive fluids).

The series carries a maximum working pressure of 450 PSI (31 bar), a test pressure of 650 PSI (44 bar), and an operating range from -320°F to 437°F (-196°C to 225°C), making it suitable for hydraulic oil cooling, lube oil cooling, and water-to-water process duty. Application engineers can configure and size the right BPW for your system, and TTP’s XSelector^® sizing program helps optimize the selection.

Consult catalog for additional sizes and technical information.

Consult catalog for additional sizes and technical information.

Case Drain Oil Cooler — Rear TEFC Motor-Mount, No Fan Required

The Thermal Transfer Products Industrial RM Series is a compact, low-cost, low-flow air-cooled oil cooler designed specifically for hydraulic case-drain cooling. It mounts on the rear of an existing TEFC (totally enclosed fan-cooled) electric motor and uses that motor’s own fan airflow to cool the oil — so it needs no fan or motor of its own, saving cost, space, and installation effort.

Its efficient design includes multiple-pass flow options as standard, and an adjustable mounting plate lets the cooler mate precisely with the electric motor’s fan (on the RM-19 and RM-22). Built with a copper-tube/aluminum-fin core, a protected steel cabinet, and a washable stainless air filter, it’s well suited to hydraulic power units where pump case-drain flow must be cooled without adding a dedicated cooling package.

The RM Series is offered in multiple sizes with SAE, NPT, or metric connections and mounting brackets included. TTP’s XSelector^® sizing program — available online and as a mobile app — helps select the right model for your case-drain flow and heat load.

Consult catalog for additional sizes and technical information.

Mobile Air-Cooled Hydraulic Oil Cooler — DC or Hydraulic Fan Drive

The Thermal Transfer Products Mobile AOC Series is a cost-effective air-cooled hydraulic oil cooler built for mobile and off-highway equipment. It uses a copper-tube, aluminum-fin core with a high-performance air-side fin design, and is offered with 12- or 24-volt DC fans or a long-life hydraulic fan motor drive, in single- or dual-fan configurations, making it ideal for low-flow power unit applications.

Because it’s designed for remote mounting away from engine cooling, the AOC doesn’t block the main engine radiator — a key advantage on machinery where space and airflow are tight. Low-amp-draw DC motors reduce electrical load, and the heavy-duty construction stands up to demanding off-road environments. A serviceable, removable stainless air filter prevents air-side core blockage from dust and debris, and aggressive turbulators deliver optimal heat rejection at lower flow rates.

Options include a built-in pressure bypass (30 or 60 PSI settings for cold-start protection) and Heresite coating for offshore or corrosive-environment operation. Connections are SAE standard. Maximum operating pressure is 300 PSI with a maximum operating temperature of 350°F. TTP’s XSelector^® sizing program — available online and as a mobile app — helps size the right model for your flow, heat load, and space.

Consult catalog for additional sizes and technical information.

Low-Cost Air-Cooled Hydraulic Oil Cooler — Copper Tube / Aluminum Fin

The Thermal Transfer Products Industrial AOC Series is a low-cost air-cooled hydraulic oil cooler built with a copper-tube, aluminum-fin core and an AC fan drive. It’s designed for basic hydraulic power unit applications and lower flow rates, cooling hydraulic oil with ambient air where an economical, industrial-duty cooler is the priority.

The AOC Series is available with or without an internal bypass, and its dual-rated 50/60 Hz electric motor (single- or three-phase) allows for application flexibility worldwide. A standard removable air filter prevents air-side core blockage from dust and debris, and aggressive turbulators deliver optimal heat rejection at lower flow rates. Connections are available in NPT or BSPP, and the serviceable bypass valve is built into the tubes without affecting external dimensions (the smallest AOC-08 model is the exception).

The series covers oil flows up to 150 GPM, with a maximum operating pressure of 300 PSI and a maximum operating temperature of 350°F. To support system design, the AOC Series is backed by downloadable 3D CAD models, technical documentation, and application engineering support to simplify OEM integration. TTP’s XSelector^® sizing program — available online and as a mobile app — helps optimize model selection.

Consult catalog for additional sizes and technical information.

Modulating Water Regulating Valve — Self-Powered Oil Temperature Control

The Thermal Transfer Products modulating water regulating valve automatically controls the flow of cooling water to a water-cooled heat exchanger to maintain a desired exiting oil temperature. As the oil temperature rises, the valve’s sensing bulb opens the valve to admit more cooling water; as it falls, the valve throttles back — holding a stable oil outlet temperature without wasting water. Because it’s thermally self-actuated, no external power source, air supply, or control wiring is required.

Every stock valve ships with a drilled and tapped internal bypass in the regulator body, fitted with a solid plug for 100% shut-off. A drilled orifice plug is packed with each valve for field installation when a continuous minimum water flow is required — for example, to prevent the exchanger from ever fully deadheading. This lets you configure the valve for either full shut-off or maintained minimum flow, on site, without extra parts.

The valve is ideal for water-cooled cooling circuits using TTP’s shell-and-tube (HC, HCR, B/SB, CA, EK, EC, UC/UCV) and brazed plate (BPSW, BPW) heat exchangers, where it conserves cooling water and stabilizes oil temperature. Note: these valves are not for salt water service. TTP Application Engineering can help select the correct valve and temperature setting for your system.

Consult catalog for additional sizes and technical information.