Author Topic: Compressors  (Read 19351 times)

altfuelfurnace

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Compressors
« on: October 05, 2012, 10:47:12 pm »
is anyone using the gast gun-style oil burner compressor on the siphon
system ? Ive heard its noisy and for 300 dollars is it worth it.it
mounts right to the burner and gets driven by blower motor . or does
everybody use stand alone compressors and what type.

scott

altfuelfurnace

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Re: Compressors
« Reply #1 on: October 05, 2012, 10:47:27 pm »
Don't waste your money on the Gast. I bought a brand new Wedco gun with
the onboard Gast compressor and after 1000 hours I had atomization
problems. Unit was supposed to produce 15 psi. I installed guage after
I had problems to discover after only 1000 hours it was producing 7
psi. I installed another solenoid and air regulator and hooked it up to
shop air compressor and have not had a single problem since. As a
matter of fact it runs so good now I can say I don't think it ever
produced near 15 psi. Yes, It is very noisy ! Put the $300.00 towards
an air compressor!

Hope this helps, Todd

altfuelfurnace

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Re: Compressors
« Reply #2 on: October 05, 2012, 10:47:47 pm »
HI,
Go to ebay and look up Thomas compressors. Mine is a 2 diaphram pump
it produces about 35 PSI it draws 4.5 amps and produces all the air
you could ever use on your siphon gun.Best of all it is quiet I
bought mine for 60.00 shipped to my door! it's awesome
Best,
Joe

altfuelfurnace

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Re: Compressors
« Reply #3 on: October 05, 2012, 10:48:01 pm »
Joe,

Same here. Got mine off ebay as well for about the same price. It
is a Thomas 2650 double piston air compressor and it is very quiet.
Not much louder than the blower of the burner! You can barely hear it
right outside the shed I have the boiler in. I bleed off the excess
air, send it back to the intake through a tee then regulate the rest
over to my nozzle. The setup works very well.

Jason

altfuelfurnace

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Re: Compressors
« Reply #4 on: October 05, 2012, 10:48:17 pm »
Scott,

Owned one and operated it for a year before I decided to build my own
siphon setup. It was an Omni boiler with a side mounted Gast
compressor coupled to the end of the blower motor on a Wayne
Combustion Systems burner. You are right, it was noisy and it
carried moisture over to the air passage in the preheater block which
contributed to lots of nozzle maintenance. I have not written off
the Gast compressor completely though. With a quest to build the
lowest power consumption system possible, I am thinking of directy
coupling another used Gast rotary vane compressor to a DC motor and
dial in the exact output I need for the nozzle air to avoid the
bleedoff valve, tank, or regulator's typically used with these
compressors. I figure if one were to slow the RPMs down on the
compressor and take 100% of the output of the compressor and send it
to the nozzle, it might make a pretty decent highly efficient air
source. Setting it up this way should help make it quieter too. I
will let you know how the experiment goes. I guess the moral of the
story goes is that the direct burner mounted Gast compressors are not
as good as the separately mounted compressors such as the Thomas 2650
units found on ebay. You have to admit, the Gast burner mounted
compressor looks far better installed than any other remote setup but
it is not worth the money and problems associated with it.

Thanks,
Jason

altfuelfurnace

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Re: Compressors
« Reply #5 on: October 05, 2012, 10:48:32 pm »
Is anyone using the small compressors off domestic fridges?

altfuelfurnace

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Re: Compressors
« Reply #6 on: October 05, 2012, 10:48:45 pm »
I use a old fridge compressor for air brushing that works very well but the
question here, in trying to use one for a furnace gun, is would it have enough
air volume to do the job?
Richard in Vermont

altfuelfurnace

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Re: Compressors
« Reply #7 on: October 05, 2012, 10:49:01 pm »
Lately those are hermetically sealed and use the return oil flow for cooling
over open windings.

Christopher

altfuelfurnace

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Re: Compressors
« Reply #8 on: October 05, 2012, 10:49:18 pm »
I think the best and cheapest set-up is using a vacuum pump ($40 used)(in
reverse) powered off the burner.

--Paularlo