301616 - Miller Coolmate 1.3 Water Cooler 115V

Technical Overview of the Miller Coolmate 1.3

The Miller Coolmate 1.3 (SKU: 301616) is a specialized industrial coolant system engineered to provide thermal management for water-cooled TIG and MIG torches. Designed primarily for integration with the Miller Dynasty 210, Dynasty 300, and Maxstar 280 series power sources, this unit operates on a standard 115 VAC input (50/60 Hz). The system utilizes a closed-loop design featuring a high-efficiency fin-and-tube heat exchanger and a radiator to dissipate heat effectively, maintaining optimal operating temperatures for welding torches rated up to 280 amps.

At the core of the Coolmate 1.3 is a brass-body, positive-displacement rotary vane pump. This pump architecture is selected for its ability to deliver consistent coolant flow and pressure, significantly outperforming vibratory or impeller-style pumps in industrial environments. The system is factory-calibrated with a pressure-relief valve set to 55 PSI, ensuring stable pressure delivery to the torch head without exceeding component ratings. A thermally protected 1/4 HP motor drives the pump and fan assembly, providing a safeguard against motor burnout during extended duty cycles or in high-ambient-temperature environments.

The unit features a 1.3-gallon (4.9 liter) reservoir molded from high-density polyethylene, rendering it impervious to rust and corrosion—a critical feature for long-term reliability in shop environments. The chassis is designed with a horizontal form factor (11.38" H x 10.38" W x 24.25" D) that matches the footprint of compatible power sources, allowing for secure stacking to conserve floor space. Standard 5/8-inch 18 left-hand fittings ensure broad compatibility with industry-standard water-cooled torches. Maintenance interfaces, including the fill spout and filter assembly, are positioned for accessibility, while a front-mounted fluid level sight window allows for immediate visual inspection of coolant levels.