17 years ago
diaphram Shurflo pump in my junk pile. It will make adequate flow and
pressure but the pressure pulses were way too much to be tolerable for
a TIG cooler. Several people suggested making an air over water damper
but I did not think it would work well enough and thought that the air
in the column would dissolve in the water and stop damping.
I made the damper out of a foot long piece of 2" ID tube and welded
endcaps on it, drilled and tapped the endcaps. It really does solve the
pulsation problem! Without the damper, the pressure gauge needle covered
about 45 degrees of the scale. With the damper, there is no noticable
vibration. It really surprises me how well it works. As for the air
dissolving, I will have to play wth it for a while and see how that
works out. Seeing how well this one works, I would probably be willing
to spend money for a damper with a diaphram to keep the air from
dissolving. A commercial damper costs about 1/3 of what a new pump does.
learning on the fly,