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Roger Prosper
11-09-2000 19:18:27
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Re: Re: Old Air Compressor.??......Roger Prosper? in reply to ltf in nc, 11-09-2000 18:14:34
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2hp is more than enough for a 220. Sheave the motor for the rpm's written on the metal tag on the compressor and check the amp draw. It should be well within the limits of a 2hp motor. 1hp will work as well if geared correctly for amp draw. Just don't expect a hurricane of air from it.
Yes, these units are very long lived, which is why they were often used for HVAC applications to run dampers and the like on duct work. If it is completely rebuilt, it should last you another 60 years! Compressors like this is why the DeVilbiss name was gold for so many years. I leave the tank usage to your discretion, but I have not seen a tank fail catastrophically, more along the lines of a pinhole leak, which usually gives you ample warning of rust-through. I have heard of parts getting scarce, as this unit is probably out of production now. There was also a single cylinder version called, not surprisingly, the 120. Make sure the unloader is set correctly, if it has one, so that when it shuts down, you get a short blast of air from the copper line which runs from the check valve, back behind to the unloader. Basically, it is just a centrifugal governor type of device which open and closes a needle valve to let the pump and check valve blow down when the compressor stops. There is a lock nut on the unloader which can be loosened to allow you to turn the unloader mechanism in or out to set it up for porper operation. If it doesn't have this setup, run the copper line from the check valve to the needle valve on the pressure switch, which does the same thing. If the compressor is not unloaded after shutdown, you will probably blow the breakers on start up, and cause the motor to work very hard indeed.This is a single stage unit, so don't set the pressure above 125 psi.
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