"Bob La Londe" wrote:

Anybody here play with this kind of cutter? What kind of water pressures
does it take? How is the nozzle shaped internally? What kind of thickness
can you cut? What kind of volume of water does it move?


I worked with non abrasive waterjet for a number of years, uses the same type of
intensifier and those things are very expensive. My stuff operated at the 50-55,000 psi
range.

I was using diamond or saphire (cheap) nozzles with a 0.005" - 0.007" orifice.

Plumbing uses special connectors where the pipe is threaded for a left hand ferrule that
is compressed by a right hand nut, the end is coned at ~45 degrees and the connectors have
a mating cone about a degree different to cause cause an interferance fit. Plumbing tends
to be 304 or 316 depending.

http://www.autoclave.com/ To see fittings.

http://www.highpressure.com/valves_index.asp?ID=3 They were less expensive than Autoclave
back in the late 90's.

Intensifier piston rod is solid carbide on an Ingersol streamline and check valves have a
short life. The best swivel is a coil of tubing. They make swivels but they tend to go
for a grand+ or so and eventually fail.

Oh, there is no such thing as a minor leak in a waterjet system. The biggest issue I had
with production is they liked to keep running when ever a leak started, that water cuts
everything, you got to be on top of repairs or it will cost you even more.

Most of my comments apply to abrasive jet, that has a system to introduce garnet iirc into
the water after it exits the orifice.

Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller