Can anyone ID this compressor?

This is the compressor pump off a dump-landed motor/pump combo I got today. Anyone know who made it? Single stage, two cylinder cast iron compressor from the '30s-'50s. The neat feature is that it has a centrifugal unloader valve, so it has to be a high-end machine. The air cleaner is this great big casting with a felt element. The pump was mounted to a little platform with a finned air line (like a 2-stage's) going to a tiny (like 12x6") pressure tank with a drain. I'm guessing that it was just for trapping water before the air went into whatever large tank this was probably used with.

The little tag is very worn, but it says "Model (maybe something here) 210".

BTW: It's only horizontal because I just got it home.

If it is a Kellogg 210, you have yourself a good quality pump. Parts may be hard to find though, as I believe this pump was discontinued back in the 60's. Biggest thing to be careful of is torquing the two bolts near the top rear of the crankcase, next to the gap. It is very easy to split the case here and ruin it. If in doubt, leave these a bit on the loose side and Loctite them when reassembling the pump.

Thanks Roger, you're great. Do you know the age this one might be? I don't know if it was original, but it was coupled to a huge cast-iron 3/4HP motor that is about the size of a modern 5. Also, do you know what Kellogg's running specs were for this unit? RPM, HP, CFM?

If you don't mind, I have another one for you. The pump in the photo was another dump find a few years back. I've been using it on my homemade compressor since. It's about 12" tall, cast iron block with aluminum head and rear cover. Disc valves. No maker's marks. I've only seen one other and it was on a store-brand machine from the '70s.

Thanks

Actually, the check valve is the aluminum thing at the tank. Right off the head we have a tee that goes to the unloader valve in the pressure switch. After the tee is a 1/4>3/8 adapter and then an el with a tubing fitting. The tank line then goes down to another tubing fitting at the check valve. Getting that copper tube bent so smoothly with springs and sand took a while!

• Kellogg Specs for Current Cast Iron Compressor Pumps

Thanks again

Here's the photo. Says model A-4 on the spec plate, no maker's name.

It could very well be from another company. Wasn't Brunner also known as a bare tank maker?

As far as I know, the Brunner tank manufacturing company is not the same as the compressor company, but I stand to be corrected.

Have you opened the "Kellogg" yet to see if it is indeed the genuine article? I was thinking maybe there was a possibility that it might be a Brunner if not a Kellogg.

Seems like an episode of Antiques Roadshow sometimes!

Haven't torn into the Kelloqq, but you were right about the brand. Under about a half pound of crap I found a decal that says "Br k Sho Co pan ". You get the picture. Turns out that the crank is slighty bent from its fall into the scrap bin. Looks like I'll have to try and straighten it.

Best way to straighten the crank, in my experience, is to set up a dial indicator on the side of the pump and rotate the flywheel till you find the spot closest to the pump. Mark it and bring it up parallel with the block. Now, put a small hydraulic ram between the block and the flywheel, like the small ones you can buy to pop ball joints, and gently push the flywheel out a bit farther than straight up and down, so when it springs back into place, it will be close to level. It might take a few tries, but I have gotten them to within .002" of true using this method. It comes in handy when you tip over an $8000 duplex Devair compressor when all you have to install it with is an engine hoist and a 12" sling, cough, cough...

You should be able to rent a porta-power and the small ram from a rental shop.

I'll give that flywheel method a shot. I have an old German hydraulic kit--don't think I have the short ram/spreader. Have you ever seen an iron flywheel busted thi