Machine Design

Pressure/Vacuum Pump

The Horizon Model 2250 pressure/vacuum pump targets portable oxygen concentrators. The pump uses a quiet, low-vibration WOB-L piston design and magnesium components that limit the pump weight to just 2.5 lb.

A highly efficient brushless dc motor offers variable speed from 1,000 to 3,000 rpm, allowing airflow to be steplessly varied. In addition, an optional closed-loop controller allows motor speed to be maintained at a preset, constant speed regardless of load or voltage fluctuations. The oilless piston and cylinder design promotes clean, uncontaminated airflow.

Rietschle Thomas Sheboygan,
1419 Illinois Ave., Sheboygan, WI 53082,
(920) 457-4891,

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