* Ratings @ sea level "Basic rule of thumb", Atmospheric pressure drops 1" for every 1000' altitude. I.E. same pump that pulls 28" @ sea level will pull 23" in Denver @ 5200'. Holding power is also reduced by line loss through tubing, seals and porous medium (your bowl or platter).
Note: Pumps are from former operating systems and may exhibit scuffing, minor dents, dirt, dust, and discoloration of aluminum surfaces. this does not impede functionality or operations of the pump.
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**Thomas, Gast, DeVilbus and a few others all manufacture industrial Dry Cup, wobble-piston type pumps that among other uses are primarily for home oxygen concentrators. I have supplied from all of the above. They have similar construction, capacities and quiet operation and many times interchangeable in the same machine. Thomas has the largest market share and as a result I primarily supply Thomas pumps. . I stand behind all my product, satisfaction guaranteed. Many photos on this website are of the Gast Pump (black fan shroud on each end of pump). Please email/call me if any questions. Bob click here
About the Vacuum Pump:
I am presently supplying the popular Thomas 2660 and occasionally the Gast 82R **(see note below) industrial pressure/vacuum pump, re-manufactured in a ISO 9001:2008 facility. These pumps are typically from home medical oxygen concentrators and are designed to run 24/7/365 for 5+ years before needing maintenance. Formerly I purchased these pumps as salvage and rebuilt in house as needed. Now I found a source to purchase re-manufactured pumps at an affordable price Every moving wear part is replaced; armature and eccentric bearings, piston sleeves, piston cups and valves. I install a capacitor, a 8' power cord with an inline HD double pole switch and rubber motor mounts. I bought a large quantity of pumps and are able to offer them at a similar price as my in-house rebuilt pumps.
The pumps are a dry synthetic piston cup and will pull 27-28" vacuum * (90% local atmospheric pressure). They exceed vacuum venturii and diaphragm pumps by 2-6"
Also, these pumps are quiet, with my muffler you can carry on a conversation, or do a demonstration while pump is in use.