Thomas Division of Gardner Denver (Sheboygan, WI) offers Series 660/680 WOB-L® Piston pumps that provide clean air flow, long life, low noise, and low vibration. They are suitable for medical applications including oxygen concentrators, respirators, and blood analyzers. The pumps’ oil-less pistons and cylinders ensure a non-contaminated airflow. The pumps feature stainless steel valves, high-performance piston seals, hard-coated aluminum cylinders, and permanently lubricated bearings. Wetted aluminum parts are treated for corrosion protection. The single-phase AC motors are of permanent split capacitor design, eliminating the need for a starting switch. The pumps provide up to 28.5 in. Hg of vacuum, or 45 psi of pressure. Maximum flow is rated at 2.37 CFM (67.1 LPM).

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