Need some compressor help..

[Bluegiller_killer]

I'm in the process of rebuilding a 1955 Brunner compressor.. Basically it's done and likenew condition.. I will be putting this on an older style propane tank one of the big bubble looking ones I'm thinking they are 75 gallons but I'm second guessing that ill be picking it up tomorrow ill post some pics and the compressor will be finished Thursday..

Here's the question I'm having.. Can someone break down what these specs mean too a regular guy and will this handle all my tool needs, sandblaster all that..

4 cylinder
Motor hp-5
Std press setting-100
Std RPM-625

CFM
Disp.-27.0
Free air-18.3

 

[Bluegiller_killer]

Anyone out there?

 

[RECox286]

I wish my shop air maker was as hefty as yours. 18 cfm is awsome !

Most small garages have much smaller machines. I should think that

you should be able to run a small sandblaster with an output like that.

I'll bet you can't wait to get it running... and don't forget to do an oil

change around the 10 to 20 hr mark.

Uncle Bob

 

[Trey T]

The quote, "you can never have too much air," does not apply here.

You'll be able to run sand blaster or auto body sander w/o a problem.

 

[bsaint]

Should take car of everything you need.

As a one man garage, I can run anything on a total of 4.5 hp.

 

[Bluegiller_killer]

Ok I was hoping too hear that..

Unfortunately my tank fell through today but another opened up possibly.. It's a bigger propane tank like 250-300 is that too big or is bigger better??

 

[mharmon]

That might be too big. I have a 1955 Quincy 325 that I have turned up to about 18 cfm. It is for my hobby garage, but I do a lot of painting and auto body work. Here is the problem. I have a 100 gallon tank. There are numerous times I feel that is too big. If I need to run an air tool for a short blast and the tank is empty, I have to fill up that large tank. I have enough air output I'm not sure I need such a large storage tank.

I think I would have less wasted energy filling that huge tank when I only need a little.

 

[Bluegiller_killer]

Good point I have a small compressor already and couldn't you just keep your tank pressurized all the time that's what we do at work?

 

[Bluegiller_killer]

Bump for anyone else with an opinion..

 

[Domus]

Been out of the game for about 10 years or so but we always worked on 1Hp will give 4 CFM. Or there abouts.

 

[ZRX61]

That might be too big. I have a 1955 Quincy 325 that I have turned up to about 18 cfm. It is for my hobby garage, but I do a lot of painting and auto body work. Here is the problem. I have a 100 gallon tank. There are numerous times I feel that is too big. If I need to run an air tool for a short blast and the tank is empty, I have to fill up that large tank. I have enough air output I'm not sure I need such a large storage tank.

I think I would have less wasted energy filling that huge tank when I only need a little.

Why would the tank be empty?

 

[ezzzzzzz]

A bigger tank is easier on your compressor. The tank never empties under normal operations. The pressure switch is typically set to cut in at 95 psi and cut out at 125 psi. The volume of the tan is your best friend. It takes longer for that pressure drop to occur with a larger tank. A small tank is usually associated with a small compressor head too. A 60 gallon tank would be absolute minimum for spray painting or running a cutoff saw. I've seen plenty of compressors burn up from excessive run time. My compressor is a Speedaire 5Z404 5hp two-stage 17.1 CFM free air at 175 psi driven by a 220v 5hp Marathon motor. The tank is a 120 gallon Saylor-Beall vertical. There is a Speedaire 6Z948 electric drain valve fitted to bleed off condensate settling in the bottom of the tank. With the drain there is never a need to empty the tank unless I have to service something like the pressure switch. I can run a bayflex sander wide open and the compressor will kick in, run until 125psi is acheived and cut off while operating the sander. If I felt the need I'd actually pipe in the old 120 gallon horizonal Saylor-Beall tank for added capacity. I just don't need it. Bigger is better. Of course, this is just one man's opinion.

 

[Bluegiller_killer]

I like the bigger is better idea..

Ezzzzz I don't know if it matters or not but I know automatic condensate drains on a tractor trailer are to be checked daily so there kinda useless if you ask me.. I'd just keep an eye on yours it's kinda like oil injected 2 stroke the oil injection can go out before you know it you've done damage..

 

[ezzzzzzz]

Oh, you know when this thing bleeds off every 30 minutes. It will scare the **** out of you when it discharges for 2-3 seconds. If it is blocked you'd know it.

 

[Bluegiller_killer]

Oh yeah we got the same thing at work wasn't thinking about that lol. Except they blow off 250 psi and our lines can blow off up too 650 psi very annoying lol..

 

[Bluegiller_killer]

Anyone know what kind of oil too run in these big old 4 cylinders? Looks like it takes over a gallon?

 

[Trey T]

non-detergent SAE 30W is what I would guess.

Synthetic is recommended by compressor sold at big box stores.