COLW Series

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.