It's two stage then. 1 air filter on the input of cylinder one, output goes to
the input of the second cylinder then into the tank and the 110v cutoff switch.
On Fri, 21 Jul 2006 22:59:45 -0500, Jim Cathey <[EMAIL PROTECTED]> wrote:
Looked at a 40+/- gallon horizontal tank twin cylinder (?dual stage?)
"Model 1500" air compressor this evening. Appears to be 50's or 60's
year of manufacture. Plate says it's rated for 134-175 psi. Anyone
have experience with this brand/model compressor and can give feedback
good or bad? Asking price is $100.
For $100 _I'd_ buy it, working or not. Old iron tends to be
well-built stuff. Not all 2-cylinder compressors are 2-stage.
The key is whether they're in series or parallel. Series (2-stage)
usually has one smaller cylinder than the other. The plumbing
makes it obvious, and two air filters (as seen on some recent
cheapies) is a dead giveaway for parallel. The higher pressure
tends to point to 2-stage.
Most extreme case of this I saw was a 4-stage one at the scrapyard,
would put about 3000 psi. Some kind of military thing, probably
pumped up the starting bottles on old aircraft.
-- Jim
--
Luther KB5QHU
Alma, Ark
'83 300SD (236 kmi)
'82 300CD (160 kmi)
'82 300D (74 kmi) needs MAJOR work
