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thx, nope they did not have, gonna just stick with regular zinc.....

Quote: Originally Posted by batcon I called airgas and he thought that just by the size they were probably cust. owned. Also by the plastic handle around the valve and no collar or ring at the top. I may need to get them hydro tested and he told me to " stay in control" and get it done by a local fire ext. co. They will do it in house and not lose the tanks. About $35 for the test. Sounds like you got a aluminum co2 tank.

Quote: Originally Posted by Pin_Head Take a look at the ring around the valve cap and see if there is a name stamped or cast in to the ring. If there is no marking, the gas company won't be concerned about who owns them. They will be concerned about the hydro date stamp if it is out of date, but they will just charge you for the hydro test. I have never seen an aluminum welding gas cylinder, but that doesn't mean that they...

The controls are avail with many different input voltages if the pressure switch on the 110v machine doesnt have an unloader on it then you will have to something different. but if it does, use it as the lead unit that switches the time delay relay which switches the contactor that is in series with the pressure switch on the 2nd machine. (crank the off pressure up 10psi higher than the shut off of the controlling pressure switch leave it in...

I called airgas and he thought that just by the size they were probably cust. owned. Also by the plastic handle around the valve and no collar or ring at the top. I may need to get them hydro tested and he told me to " stay in control" and get it done by a local fire ext. co. They will do it in house and not lose the tanks. About $35 for the test.

Take a look at the ring around the valve cap and see if there is a name stamped or cast in to the ring. If there is no marking, the gas company won't be concerned about who owns them. They will be concerned about the hydro date stamp if it is out of date, but they will just charge you for the hydro test. I have never seen an aluminum welding gas cylinder, but that doesn't mean that they don't make them.

Acklands Grainger should have whatever you're looking for. Here in Calgary we've got Gregg's Distributors where I've dumped a few pay cheques. LOL Don't rule out any machinist supply places. I've bought some really nice taps and micrometers from these places and although they're more costly than other places, the construction of them is ahead of most others.

They unload via the pressure switch, mechanically. If the two compressors are wired to start at the same time, the one in control will get to it's threshold before or after the other. The other will either blow the valve off early or not at all, unless I'm missing something.

Cool, thanks, this thing looks like it has not too many hours on it.

Quote: Originally Posted by 1973Guppie at this time yes, I will have to use standard hex..... I am focusing now on trying to find a nice plastic cover for them. If we are not talking about a large quantity, I would just coat it with a thin layer of liquid plastic. (You can get it from HomeDepot for like $7).