www.thedriller.com/articles/84719-constant-pressure-controller
Constant Pressure Controller
February 1, 2006
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The new 2-HP constant pressure controller from Pentek Inc. features low RF interference, quiet operation, low/high voltage tolerance, continuous duty, indoor/outdoor use and a NEMA 4 enclosure. Available in 115V and 230V, the controller is UL/CSA- and CE-approved.
Pentek Inc., Card No. 226