| The Breakroom > The Water Cooler |
| 300 psi compressor ?? |
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| fixerup:
I like to use these pump http://www.dudgeonjacks.com/index_files/Page556.htm I fill the parts to be tested with water, making sure all the air is out of every cavity. then pump to the desired test pressure, close the valve and watch for water leak or pressure drop. If it fails it is very boring to watch just a small dribble of water, no big bang like air pressure :bugeye: Cheers Phil |
| picclock:
@fixerup Although I can test a lot of the parts that way I can't use that method for checking the leakage on rotary/mechanical seals and suchlike as they have to be turning and it is not possible to do that with the pressurised chamber filled with liquid. The pumps are very similar to the one I made for myself. My one will pump (with some effort) to 1000 psi. Its mounted on a board so that I can stand on it and the handle can be extended with a piece of tube. The clear tube is the liquid intake, normally paraffin now, and the outlet in the picture is the reinforced flexible hose. At the time I made it, some years ago, I was not aware that such things could be purchased. The valve seats and piston seals are all o'rings and are still original. Highly functional, but not exactly a 'looker' :drool: Best Regards picclock |
| David Jupp:
Air powered step up device - sounds like a gas booster. Small ones are widely used by Divers for topping up SCUBA cylinders. They are not very complicated, most of the ones I've seen work at much higher pressures than 300 psi. I would have thought that a 300 psi version ought to be a reasonable workshop project, won't need a very big boost ratio. They tend to be noisy. |
| fixerup:
Picclock Your hydrostatic pump looks good to me and you have built it yourself. Well Done! Even with the store bought pump $$ , I have to stand with both feet on the mounting board to get to 1000psi + . The lever is about 3' long. Instead of buying one, I would of learn more making one. :doh: Could you please explain the use of parafin ( candle wax ?) Thanks! Phil |
| David Jupp:
Paraffin = UK term for kerosene. |
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