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Pumps Provide Clean Air-FlowSeries 660/680 WOB-L Piston pumps from Thomas incorporate a package of features to provide clean air-flow, long life, excellent efficiency, low noise, and low vibration. These pumps are well-suited to a variety of medical applications, including oxygen concentrators, blood analyzers, and dental carts.

The pumps' oil-less pistons and cylinders, plus efficient intake filters, ensure a non-contaminated air flow. Stainless steel valves, high-performance piston seals, hard-coated aluminum cylinders and permanently lubricated bearings offer long-life performance. Wetted aluminum parts are treated for corrosion protection. The pumps' single-phase AC motors are of ultrareliable permanent split capacitor design, which eliminates the need for a starting switch.

Series 660/680 pumps provide up to 28.5 in. Hg (-965 mbar) of vacuum, or 45 psi (3.1 bar) of pressure. Maximum flow is rated at 2.37 CFM (67.1 LPM).

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