High
Velocity Oxy-Fuel Spray Technology (HVOF)
Klaus
Enterprises Ltd. uses the Diamond Jet Spray System. The HVOF system uses high
velocity combustion gases to heat and propel metallic powder on to the rod. The
exhaust gas, a combination of oxygen and hydrogen, produces a temperature of
5,000 F and an application velocity of 4,500 ft/s (over four times the
speed of sound). Under this extremely high temperature and velocity, powder
particles injected into the gas stream produce high kinetic energy when they
contact the rod. Upon impact, the particles are liquefied to form a very dense,
exceedingly smooth coating with high bond strength.
Spray coatings
can be Tungsten, Metco II, Babbitting, Nickle Cadmium and Aluminum in either
wire or powder form.
The typical
sprayed parts are compressor piston rods and pump plungers in corrosive
applications. For example, one of our customers had to change their OEM
plungers every four months in an application that produced sour water. After
replacing these OEM plungers with Tungsten coating they continue to run all of
the 5 pumps for more than one year without replacement.
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