how hot should an piston air compressor get

Posted by Hustlin' Hank on October 13, 2009, 4:37 am

> My old Monkey Wards 2 piston, single stage, 6 gallon (guessing), 1 hp,
> 120V air compressor runs as hot as 180 degrees on the cylinder head
> when I'm using it a lot. =EF=BF=BDIs that a normal temperature for this k=

ind

> of compressor?

It is basically the same thing as a car engine without the fuel to
burn to make it hotter. Car engines need cooling because of the added
heat from the fuel being burned. They cool car engines down to 180-
200 degrees, which is the normal temp. I am just guessing, but I would
think 180 is about right.

Hank

Posted by on October 13, 2009, 8:09 am

> > My old Monkey Wards 2 piston, single stage, 6 gallon (guessing), 1 hp,
> > 120V air compressor runs as hot as 180 degrees on the cylinder head
> > when I'm using it a lot. Is that a normal temperature for this kind
> > of compressor?

> It is basically the same thing as a car engine without the fuel to
> burn to make it hotter. Car engines need cooling because of the added
> heat from the fuel being burned. They cool car engines down to 180-
> 200 degrees, which is the normal temp. I am just guessing, but I would
> think 180 is about right.
> Hank

It's not the same or similar to a car engine. In a car engine
without fuel, the air would be compressed on the compression stoke,
then immediately decompressed on the power stroke in the cylinder.
When you compress it, it gets hot. When you decompress it, it gets
cold. In an air compressor, the cylinders are strictly
COMPRESSING. The decompression takes place elsewhere, eg where it's
being used in a tool, or blowout gun, etc.

Posted by Hustlin' Hank on October 13, 2009, 1:13 pm

On Oct 13, 8:09=EF=BF=BDam, trad...@optonline.net wrote:

> > > My old Monkey Wards 2 piston, single stage, 6 gallon (guessing), 1 hp=

> > > 120V air compressor runs as hot as 180 degrees on the cylinder head
> > > when I'm using it a lot. Is that a normal temperature for this kind
> > > of compressor?

> > It is basically the same thing as a car engine without the fuel to
> > burn to make it hotter. Car engines need cooling because of the added
> > heat from the fuel being burned. They cool car engines down to 180-
> > 200 degrees, which is the normal temp. I am just guessing, but I would
> > think 180 is about right.
> > Hank

> It's not the same or similar to a car engine. =EF=BF=BD In a car engine
> without fuel, the air would be compressed on the compression stoke,
> then immediately decompressed on the power stroke in the cylinder.
> When you compress it, it gets hot. =EF=BF=BDWhen you decompress it, it ge=

> cold. =EF=BF=BDIn an air compressor, the cylinders are strictly
> COMPRESSING. =EF=BF=BD =EF=BF=BDThe decompression takes place elsewhere, =

eg where it's

> being used in a tool, or blowout gun, etc.

Kinda picky aren't ya? I was trying to keep it simple in the fact it
is only a piston that moves up and down. But since you want to get all
techy on me.........When the outlet valve (think exhaust )of the
compressor closes (piston going down) the intake valve opens and
brings in cool air that also helps cool the cylinder, along with the
cooling fins. Altho there is significant heat built up in regards to
compressing the air, it still isn't a match for fuel being burnt also.

Hank

Posted by John Gilmer on October 13, 2009, 11:11 pm

A single stage air compressor can easily get hot enough to cause a 2nd
degree (blisters) level burn on the skin.

If you can to get "scientific" that find out what happens when you compress
air from 0 psig to 135 psig under adiabatic conditions. (Add about 15 psi
to convert to psia.)

Posted by Steve Barker on October 14, 2009, 1:42 pm

Ashton Crusher wrote:

> My old Monkey Wards 2 piston, single stage, 6 gallon (guessing), 1 hp,
> 120V air compressor runs as hot as 180 degrees on the cylinder head
> when I'm using it a lot. Is that a normal temperature for this kind
> of compressor?

Upon failure, we disassembled a large compressor at the autoshop i
worked at. There was carbon on top the pistons.

s

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