Hi, all,
I havent seen this pump mentioned, but have seen one in action on YouTube somewhere.

I got it pretty cheap and I know it was used for waste oil-petro.
Here's an example of the model:

http://cgi.ebay.com/IR-ARO-1-inch-doulble-diaphragm-pum..._trksid=p3286.c0.m14

It seems to be a decent industrial pump, but expensive to rebuild.
Dose anyone have experience with these?
I cleaned the oil sludge from the fluid sections per IR's pdf manual, but I think the major valve or case is still mucked up.

When I apply air, it cajunkts, but there is no suction and it wont seem to speed up past the slow point it starts at.

Is it worth continuing to repair? Or should I put it in the dirty aluminum scrap pile?
All I really have into it is time... o and what aplications could I use it for? I was thinking basic transfer-not shear mixing.

TIA, Brian

Better link:
http://fluids.ingersollrand.com/IS/product_nospecs.aspx-en-3845

The pump you describe will work well with biodiesel and related components.

The pumps are relatively easy to rebuild.

The pumps have three main "systems" and all must work properly.

System 1: Diaphragms. The diaphragms can be made of many different acid and corrosion resistant materials. Try to find a set of teflon diaphragms. They are reasonably durable and stand up to almost everything in BD processing.

System 2: Balls and seats. The pump contains four check valves, two inlet and two outlet valves, made up of small round balls. Teflon seats are readily available and should be used. The balls rarely need replacement. They only need to be replaced if they are worn and do not seat properly. The balls are usually made out of an inert hard plastic.

System 3: Air valve. The air valve can be rebuilt with out too much problem. The O-rings and seats may wear out. But are easy to find replacements for at a local hardware store.

I have used many of these pumps and swear by them. They pump well, they have good suction, and they can run dry with no problems.

Godd luck.

Thank you Producer,
In the fluid side that I cleaned, the parts were indeed teflon.
It is now clean and sealed.

I think my problem is in the air delivery side.
I will autopsy that part tonight when I get home. I'll replace the gate valve with a watertrap/regulator as well.

It would be nice to use this as a modular portable pump for collection and transfer.
Thanks
Brian

I have two of those plus a smaller one and really like them. They are very durable.

Good to know, Raften.

Still no luck with getting suction.
I pulled the 'Major Valve' and inspected it.
It was snug, clean and still had assembly lube on it. The aluminum plunger, called 'Spool' was also clean and like new.

I reassembled as per the manual. I applied 100psi and opened the valve. No suction, no difference from the first test.

This leaves the 'Pilot Valve', wich, I guess I should have checked when the diaphrams were off.
They need to come back off to get to it.
If that dosent get it, it's going to the local pump shop.
Its not cracked anywhere and it's probly worth the bill to get it fixed.
Let's hope the problem is in the pilot valve.
I'll post again for those interested.

Brian

Before taking it to the pump shop try another test to try to pinpoint the problem.

Close off the discharge piping. It the piping is fitted with a valve, then close the discharge valve tight.

Turn on the air. If the valves and seats are working properly then the pump will cycle a couple of time as pressure builds in the discharge pipe. Then the pump will stop. This would indicate the valves are working properly.

If the valves are not working properly, then the air in the discharge pipe will leak back through the valves causing the pump to cycle to replace the air that leaks out through the valves. In this case the leaking air is in the pump and piping and not the compressed air used to energize the pump.

I use a Sandpiper diaphragm pump. So far I have had two problems.
The first time the pump would run fine but would not pump at all. The problem was the check valves. The balls move up and down in a chamber or cage created by ribs sticking in from the sides of the chamber pipe. The ribs keep the balls centered over the valve seats. The balls swelled enough that they would stick in the cage and not fall back down onto the seats. I removed a little plastic form each rib to give the balls move room.
The second time I had a problem the pump would not run at all. Just made a large hissing sound. The diaphragms had gotten brittle and had cracked. That allowed the air to escape and not drive the pump. I replaced the diaphragms with a different material. Hope they last longer than the first set.

Thanks...
I went thru every removable part, and just happened to be at the pc and caught Fuelfarmer's statement about the check balls.

I think that might be the problem. They did stick a bit. So I filed down the ribs in the lower ball cage. The uppers were fine.

I tried it again and if I wobble it around on the floor, it would suck and blow just for a second. And the speed via more psi would increase some.

I think I need new check balls or get in there with a dremel tool to fix it.
At least I believe that I got it narrowed down and only have to remove the lower manifold to fix it.
Thanks guys for the help...
Brian

I havent dont anything else to the pump, but tonight, while doing some garage cleaning, I put a nipple and a 90* with a funnel in the suction (bottom) manifold.

I was expecting the intake to really suck on my hand--IR calaiming 35gpm. It was working, i think, but not as I was anticipating.

I poured water into the 8" funnel and it shot thru as fast, if not faster than I could pour it. Never overflowed the funnel.

But thats gravity fed, basicly. I dont think it has the suction to transfer from below itself. I dont have the right components at home to try sucking from a collection barrel. as in hoses.

Maybe I expected to much suction, and its ok. But it just dosent seem that it would.

Also, in moving it around on the driveway while running and palming the ports, it lost motivation all together till I jostled it around and got the checkballs free- iguess.

So, Im getting closer. I think it was running on one diaphram at times, then 2,(if possible) then getting the balls stuck upwards.

They should cast it with just a bar or level cross, so the balls would just fall instead of getting wedged in the keeper cage. concur?

Maybe the degreaser has broken down more sluge. The cycles sounded better with more and less psi.

But it did drain my Husky 15gal compressor in no time @ 100psi. So, at 35 gpm, I should be able to transfer a blue poly collection drum up into my truck tank in a couple minutessuposedly.
Thats the goal for this pump and my little Huky AC.

Brian

I guess I fixed it good enuff.
I got a call to pick up oil from one of my sources and took this pump and compressor to the drum.

I got about 25-30 gallons out of it. The compressor is 17gal @ 125psi.

Brian