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Posted by Vernon on June 15, 2010, 10:37 pm
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Hi,
Some time ago, on ebay, I bought a new air compressor pump like the
one shown here:
http://www.grainger.com/Grainger/items/2Z498
Although the pump has now been discontinued the site shows the
technical specs for it.
In the side of the compressor head are two threaded holes. One
appears to be 5/8" or perhaps 9/16" and the other, is 3/8".
According to the grainger site the outlet is the 3/8" hole. I have a
couple of other compressors and they have a single outlet hole and it
appears to be larger size.
Can somebody help me understand what both these outlets (assuming
they're both outlets) are for? I originally hoped the compressor
would provide enough air to supply a TD Cutmaster 51 plasma cutter.
It looks like it is not capable of doing that. Nevertheless, I would
like to assemble a small portable, light weight compressor with it. I
have a lightweight portable, but the buzzing noise drives me crazy.
If somebody could point me to a schematic of the necessary safety
components I will appreciate it.
Thanks,
V
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Posted by on June 15, 2010, 11:01 pm
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wrote:
>Hi,
>
>Some time ago, on ebay, I bought a new air compressor pump like the
>one shown here:
>
>http://www.grainger.com/Grainger/items/2Z498
>
>Although the pump has now been discontinued the site shows the
>technical specs for it.
>
>In the side of the compressor head are two threaded holes. One
>appears to be 5/8" or perhaps 9/16" and the other, is 3/8".
>
>According to the grainger site the outlet is the 3/8" hole. I have a
>couple of other compressors and they have a single outlet hole and it
>appears to be larger size.
>
>Can somebody help me understand what both these outlets (assuming
>they're both outlets) are for? I originally hoped the compressor
>would provide enough air to supply a TD Cutmaster 51 plasma cutter.
>It looks like it is not capable of doing that. Nevertheless, I would
>like to assemble a small portable, light weight compressor with it. I
>have a lightweight portable, but the buzzing noise drives me crazy.
>
>If somebody could point me to a schematic of the necessary safety
>components I will appreciate it.
>
>Thanks,
>
>V
Turn ot over by hand and put tyour finger over the holes. See which
one blows and which one draws. The inlet MUST be larger than the
outlet. For a 2.5 cfm compressor 3/8" outlet does not sound terribly
small. Some have 2 outlets - one for the air to the tank and one to
the unloader - so that's a possibility too. (then it would have a
built-in air intake filter/silencer)
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Posted by Steve W. on June 15, 2010, 11:28 pm
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Vernon wrote:
> Hi,
>
> Some time ago, on ebay, I bought a new air compressor pump like the
> one shown here:
>
> http://www.grainger.com/Grainger/items/2Z498
>
> Although the pump has now been discontinued the site shows the
> technical specs for it.
>
> In the side of the compressor head are two threaded holes. One
> appears to be 5/8" or perhaps 9/16" and the other, is 3/8".
>
> According to the grainger site the outlet is the 3/8" hole. I have a
> couple of other compressors and they have a single outlet hole and it
> appears to be larger size.
>
> Can somebody help me understand what both these outlets (assuming
> they're both outlets) are for? I originally hoped the compressor
> would provide enough air to supply a TD Cutmaster 51 plasma cutter.
> It looks like it is not capable of doing that. Nevertheless, I would
> like to assemble a small portable, light weight compressor with it. I
> have a lightweight portable, but the buzzing noise drives me crazy.
>
> If somebody could point me to a schematic of the necessary safety
> components I will appreciate it.
>
> Thanks,
>
> V
One hole is an inlet the other the compressed air outlet.
That unit looks a lot like the ones used on many of the old milk cooler
units.
--
Steve W.
(___/)
(='.'=)
(")_(")
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Posted by Jim Wilkins on June 15, 2010, 11:58 pm
Please log in for more thread options
> Hi,
>...
> http://www.grainger.com/Grainger/items/2Z498
> ...
> In the side of the compressor head are two threaded holes. =A0One
> appears to be 5/8" or perhaps 9/16" and the other, is 3/8".
> ...
> V
[runs downstairs to take a look]
I have a plug in the small hole and the outlet tee in the larger one.
One leg of the tee has a water heater pressure relief, the other goes
to a Load Genie check plus relief valve and then the tank. I think the
smaller hole might be for an unloader piped to the pressure switch,
but that compressor's pressure switch was meant for a well and doesn't
have the air valve. Northern sells switches that do, I installed one
on the salvaged/rebuilt Husky air compressor which has a plain check
valve leading into the tank.
The Load Genie jams if the inlet tube isn't well aligned. It doesn't
leak between uses, unlike the pressure relief plumbing on the Husky
I put a 1/2 HP motor with a 3.5" pulley on mine and set the limit to
around 80PSI. That seems a good compromise between enough volume and
enough pressure for inflating tires and cleaning carburetors etc. It
is NOT enough to run the plasma cutter and cost me burned-up
consumables when I tried. It's marginal for air tools but most of my
weld grinders are electric.
It is however enough to sand-blast a whole bumper with a pressure-
feed, canister gun from Sears (long ago) if I connect a larger tank to
even out the pressure variations while I'm refilling the gun.
I bought the vacuum head attachment and installed it with a street
elbow in the inlet hole, facing down to help exclude dirt. I pulled it
off coincidentally this morning to clean the filter after 5 years. The
filter was barely discolored and the small amount of sawdust or
whatever that was sucked in had stuck to the inside wall opposite the
street elbow.
jsw
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Posted by Vernon on June 16, 2010, 1:16 am
Please log in for more thread options
>
> > Hi,
> >...
> >http://www.grainger.com/Grainger/items/2Z498
> > ...
> > In the side of the compressor head are two threaded holes. =A0One
> > appears to be 5/8" or perhaps 9/16" and the other, is 3/8".
> > ...
> > V
>
> [runs downstairs to take a look]
>
> I have a plug in the small hole and the outlet tee in the larger one.
> One leg of the tee has a water heater pressure relief, the other goes
> to a Load Genie check plus relief valve and then the tank. I think the
> smaller hole might be for an unloader piped to the pressure switch,
> but that compressor's pressure switch was meant for a well and doesn't
> have the air valve. Northern sells switches that do, I installed one
> on the salvaged/rebuilt Husky air compressor which has a plain check
> valve leading into the tank.
>
> The Load Genie jams if the inlet tube isn't well aligned. It doesn't
> leak between uses, unlike the pressure relief plumbing on the Husky
>
> I put a 1/2 HP motor with a 3.5" pulley on mine and set the limit to
> around 80PSI. That seems a good compromise between enough volume and
> enough pressure for inflating tires and cleaning carburetors etc. It
> is NOT enough to run the plasma cutter and cost me burned-up
> consumables when I tried. It's marginal for air tools but most of my
> weld grinders are electric.
>
> It is however enough to sand-blast a whole bumper with a pressure-
> feed, canister gun from Sears (long ago) if I connect a larger tank to
> even out the pressure variations while I'm refilling the gun.
>
> I bought the vacuum head attachment and installed it with a street
> elbow in the inlet hole, facing down to help exclude dirt. I pulled it
> off coincidentally this morning to clean the filter after 5 years. The
> filter was barely discolored and the small amount of sawdust or
> whatever that was sucked in had stuck to the inside wall opposite the
> street elbow.
>
> jsw
Jim. If I'm not mistaken it was only today, and precisely the result
of me reading one of your discussions about your compressor that got
me interested in cobbling something together. I found your comments
(if indeed it was you!) by searching google for the compressor model
number. Your post was in response to somebody saying that a small
compressor was "useless in the real world" or words to that effect.
Small world.
V
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>
>Some time ago, on ebay, I bought a new air compressor pump like the
>one shown here:
>
>http://www.grainger.com/Grainger/items/2Z498
>
>Although the pump has now been discontinued the site shows the
>technical specs for it.
>
>In the side of the compressor head are two threaded holes. One
>appears to be 5/8" or perhaps 9/16" and the other, is 3/8".
>
>According to the grainger site the outlet is the 3/8" hole. I have a
>couple of other compressors and they have a single outlet hole and it
>appears to be larger size.
>
>Can somebody help me understand what both these outlets (assuming
>they're both outlets) are for? I originally hoped the compressor
>would provide enough air to supply a TD Cutmaster 51 plasma cutter.
>It looks like it is not capable of doing that. Nevertheless, I would
>like to assemble a small portable, light weight compressor with it. I
>have a lightweight portable, but the buzzing noise drives me crazy.
>
>If somebody could point me to a schematic of the necessary safety
>components I will appreciate it.
>
>Thanks,
>
>V