xxxRoger One More Question

I found a Worthington Air Compressor fairly close by. I know you commented on not being that familiar with them, but was wondering what you think the CFM capabilities might be based on the following information. This is taken directly from the ad for this unit. I have traded messages with the owner and unfortunately he doesn’t know much about it. The information on the tag provides me with a potential contact for specs but wanted to see what you thought. The unit looks nice and clean, however, no way to start and run it although the owner provides a return option if it doesn’t work as advertised.

Hi, you are bidding on a 2 stage 100 gallon Worthington commercial air compressor. This unit has been well taken care of with regular maintence and light use. Unit is single phase and can be 115v or 208/230 (see specs below) It is currently in storage and not hooked up as shown in pics. Unit works great, produces some serious air. Not sure of CFM, but is pleanty for a small shop or garage. Tank is rated for 200psi, has a high cut in psi. so this unit has more possible air for use. Tank is in good condition with only some light surface rust near left end. This is not a cheap home inprovement store compressor that will only last a few years. Lots of life left in it, and big air for a reasonable price. Tape measure in picture is at 5ft. Specs - - Taken from the many factory tags on unit in various places. Tank: Manf 1971. NATL BD 508217, 200psi at 650f, SH 154, HD134, FVAC, serial 711011. model 3CH8, mfg no. GBCHNA100. Pump: Worthington, serial ch2245, size 3 5/8 / 2 1/16 X 1 5/8. Motor: Baldor industrial, model l1505, serial F289, rpm 1725, 3hp, volts 115/208-230, amps 35.2/19-17.6, Shipping: You really need to pick it up yourself. This compressor is HEAVY. I can assist in loading. For a fee I can deliver it to your driveway. $200 for up to 50 miles. For $10 I can put it on a pallet rather than a skid and you can make all arrangements for shipping from my driveway. Not suggested but an option for those who need to know. Payment is expected in 5 days, Once paid; I can hold for 30days. Serious bidders please. Good luck Reserve right to end auction at any time as unit is for sale in the local paper this weekend.

Thanks again, hope I have not been too much of a bother.

The Quincy is 500 a bit more than I think it is worth. The fellow cleaned it up, when I first saw the quincy it was rough.

I remember reading an earlier post by you saying the two stage were not the best for volume of air, is that correct?

Sounds like a plan. I didn't know what shape the Quincy was in initally, so maybe it's no better than the Worthington. Looks like Parts Service International is in the Worthington parts business, so maybe your guys in Detroit can get some through them.

As far as two stage vs single stage, I wouldn't sweat the CFM output, as they will be fairly close to each other at this HP range. Two stage compressors are more efficient at higher pressures. If you do a search on ebay for Worthington compressors right now you will see a four stage Worthington pump there for sale right now. That is probably good for a couple of thousand psi. Neither the seller or the buyer seems to know what they have there.

Single stage output drops off at higher pressures. I was running a Quincy 230 one day and it took forever to reach 140 psi after an inital speedy climb to 100, although I have seen many s.s. compressors running up to 150 (heavy industrial units). Single stage compressors run hotter as well, and have no interstage tubing to dump heat. Most heavy-duty industrial reciprocating compressors are two stage.

• Worthington Parts

I'm not Roger but I'll offer an opinion. The numbers given indicate a 3-5/8" dia bore for the first stage and a 1-5/8" stroke for both stages. That equates to a displaced CFM of 9.7 assuming 1000 compressor rpm. Delivered CFM will be less than this, say about 9 CFM at 90 psig. That's in line for a 3hp machine. You'd have to have one big circuit to run that motor on 115v (40 amps) so I'd plan on a 20 amp 230v circuit. The 200 psig tank with National Board registration indicates that it was inspected when built and presumably constructed to the ASME code. There probably is an ASME code symbol (cloverleaf type) on the same nameplate. That tank rating would indicate a shutoff pressure of 175 psig, typical of most two stage units.

Make sure there is a relief valve and it is free to operate at less than 200 psig. I'd also suggest pressure testing the tank with water at 300 psig to be on the safe side before use.

Rod

Charles