Pressure pot questions

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DME72

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Joined
May 9, 2012
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15
Location
st louis
i looked at an old pressure pot at a tool place i have bought from in the past,they had an old pressure pot in back i could buy really cheap.it is a 2 gallon pot with a cast aluminum lid stamped 50psi max.it is all there but the gasket is in sad shape from dry rot.this pot had no name or markings on it anywhere i could find.it couple months ago someone posted about a wr brown pot and a montgomery ward pot.it looks like those with the five hold downs on the lid,but i can not find any info about these pots.i would like to start resin casting and do not want to spend alot of money to start up until i find out if i will like it.has anyone on here made there own gasket or know where to buy a gasket? i do not have any photos of this pot right now.to start out would this be a good pot?any comments or thoughts would be great.
thanks
doug
 
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I'm sure you will get some suggestions on how to get a gasket from some of the members on here. Might be a good deal if you can get it for a decent price.
Mine only has 4 hold downs on it, it's from Harbor Freight.
 
I went back in the forum and it was JD Combs Sr who had the pressure pot like the one i saw.the one i am looking at is exactly like his blue one in the picture that he posted in august of this year.when i say low cost i will have more in brass fittings to set it up than what i can buy this pressure pot for!the main thing being the gasket that is in sad shape.thanks.
doug
 
This pot was made by W.R. Brown company for Sears, Montgomery Ward, Western Auto, Economy Auto and other "catalog" stores. They had different colored tops (depending on "brand- Sears, Western Auto, etc), but otherwise, the same pot. Brown used the brand names "Speedy Sprayer" " SIR SPeedy Sprayer" and maybe others. W.R. Brown was bought by another pressure paint company near Chicago. I forgot the name of the company, but they are still in business, but about a year ago, they did not have a gasket for this pot. I have this pot (red top) and it is my favorite.

Unless the gasket is ripped, a good coat of Vaseline Petroleum Jelly may be all that is required to keep this pot functional for a long time. It's pretty easy to check for leaks. Fill with low pressure (20 lbs) and watch the guage for 1 hour. If the gasket it shot, it will usually "hiss" and 20 lbs and read "0" in less than an hour.
 
I made my own gasket from "form a gasket", BUT I AM NOT ADVOCATING THAT YOU DO THIS! Without fully understanding pressure vessels and the properties of gasket materials, you could be making something nearly as dangerous as a HF paint pot by forming you own gasket.
 
Andy,how well has that form a gasket worked for you.i have seen it used on stuff in the past but have never used it myself.
 
If it was me and the gasket was there, just in poor shape. I would smooth some clear silicone the entire surface of the gasket, filling in any voids. I would then place wax paper on the rim of the pot and put on the lid. Tighten it down slightly and let it sit for a day or two. In my mind that should work. Haven't tried it because the first pot I had didn't have a gasket and I ending up tossing it to my uncle for scrap. Silicone by itself did not work but it should if there is a gasket present. Just My Opinion, of course.
 
Depending on the shape of the pot where the gasket seats, if it is a "U" shape as most pots have, you can set the lid up level. Then pour in a layer of silicon mold material about the same thickness as the gasket was. If you clean the seat well with acetone or something similar the mold material will stay in place.
 
JJturns said:
Depending on the shape of the pot where the gasket seats, if it is a "U" shape as most pots have, you can set the lid up level. Then pour in a layer of silicon mold material about the same thickness as the gasket was. If you clean the seat well with acetone or something similar the mold material will stay in place.
Click to expand...

If you can find it in your area, DOW 795 building sealant will form a very, very good rubber gasket this way. Much better than any RTV or Mold rubber will.

It comes in a tube like caulk and air cures (takes a fair while to do so, but is an extremely tough and elastic silicone rubber when cured).

It comes in colors too.

I've used it for everything from making gaskets in vacuum/pressure chambers (up to 2000 psi) to making an emergency patch on a punctured Jeep gas tank that ended up lasting for years (till I sold the Jeep).
 
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