Gardner Denver air compressor

[kool55]

I found another possible addition to the shop.Tuesday I will see it. It`s a Reward series 7.5 hp. 23 cfm@175 psi verticle 80 gal. tank. It is 6 years old, clean looking and has an auto drain.There is 3 reward stickers on the tank and that might mean there were 3 options that came with it,Iam not sure. It is also single phase. The one thing I don`t like is it runs at 990 rpm. Selling for $1,000.00.Anybody have been around a Gardner Denver compressor like this?

 

[Uncle Buck]

All I can tell you is that GD air compressors are quality throughout. I college interned at their Sedalia MO. plant in the late 80's. They made the big rotary twin screw jobs there at that time.

 

[Stuart in MN]

At 7.5hp it may have a three phase motor, so check the voltage.

 

[Charles (in GA)]

Almost every 7.5 hp compressor I've seen turns in the 900 rpm range. Thats how they get the extra CFMs is by spinning them a little faster, using a slightly larger motor (the 7.5 vs a 5 hp)

G-D is a very good unit, and while not a giveaway, this is not a bad price. It does have the magnetic starter mounted on it? I hope.

Charles

 

[kool55]

It does have the mag. starter mounted and they say it`s single phase. I will check it out when I go see it. I would think it was made in the usa too.

 

[goodfellow]

G-D compressors are top of the line heavy duty machines. I've seen some that have worked for decades with just simple maintenace.

edit -- I think they also own Champion Compressors so some of their designs may be similar

 

[John Timmins]

I have a Fero Air Pump. they stopped making them in the late 1930s. The compressor turns about 980 and runs just fine and has for the last 70 years? there is nothing wrong with that rpm. I have a 3 HP 220V single phase motor and pump it up to 120PSI. I don't want one running fast.

Also, air compressors have a max 6:1 compression ratio to prevent compression ignition (dieseling). Your compressor should last many years.

DaytonaJohn

 

[Junkman]

I have a Fero Air Pump. they stopped making them in the late 1930s. The compressor turns about 980 and runs just fine and has for the last 70 years? there is nothing wrong with that rpm. I have a 3 HP 220V single phase motor and pump it up to 120PSI. I don't want one running fast.

Also, air compressors have a max 6:1 compression ratio to prevent compression ignition (dieseling). Your compressor should last many years.DaytonaJohn

I would like to add...... if you take care of it, and do annual preventative maintenance, such as oil changes, etc. Most equipment failures are a result of lack of maintenance, not manufacturing defects.

 

[kool55]

WELL,I looked the compressor over today and said ok it`s for me.Looks good.The cylinder barrel has a ton of fins on it for cooling ,no dirt or even a scratch anywhere.I forgot my stop watch for timing the run cycle but I would guess 0 to 175 psi in about 5 minutes.Recovery time is about 1 minute.On at 145, off at 175. I will lower the kickout psi to about 140. Will pick it up on Monday.

 

[Charles (in GA)]

On at 145, off at 175. I will lower the kickout psi to about 140. Will pick it up on Monday.

145 on, 175 off is pretty much the standard for a two stage pump. If its operating at that, I'd be inclined to leave it there. The pressure switch was probably factory preset to these settings. The idea is you regulate the pressure down to aprox 100 as most air tools are designed to operate at that pressure. Doesn't make much sense to take a two stage compressor and operate it as if it were a single stage. The higher pressure means more stored energy and more time between cycles. You want fewer cycles, as start up is the hardest on the compressor.

Charles

 

[kool55]

I agree . What was I thinking?

 

[kool55]

Picture of my new addition

 

[kool55]

YAHOO!!!!! My first successful picture

 

[daw53]

Very nice looking compressor! You weren't kidding about the condition. I'd say it was worth every penny.

- David

 

[kool55]

Just droppedit off at my pa. house. Next couple off weeks it will find its way to the virginia shop. Can't wait. I retire november 21.Move over Old Car Guy.

 

[bluthndr]

I have one from the 40s - ADD1101 - anyone know where I canfind info on it??

 

[zoomzoomjeff]

That's a BEAUTIFUL machine there! I have compressor envy!

 

[930dreamer]

I have one from the 40s - ADD1101 - anyone know where I canfind info on it??

The OP is from 2008
Do you have a picture of the GD 1101?

 

[bluthndr]

Still going strong powering my shop - had a customer give me a spare pump he had in his barn minus head that he said had a bad hole, so I guess I have a spare rod and crank at least.

I did get a parts manual/chart from a Gardner denver place out west I think, but pretty much none of the stuff is available. Not too shocking.