2 Used Busch non contacting vacuum pumps. 3 phase motor. Was installed to lift parts at a cabinet mill. For sale as is, you pick up. Shaft on motors will turn free by hand. Have heard of people putting a gas motor on these with flywheel and belt. Someone said these would pull too hard for trees, if your using a vacuum control valve that limits the pressure on a little milking pump... Why would these be different? Talk to Busch directly and get the data on these pumps, don't take third hand info. New contact number, ask for Chuck 304 897 6035.