The largest electric motor available on single phase supply is normally 3 h.p. This
will drive the pump of a l4 c.f.m. compressor, which will give l0 c.f.m. FAD (free
Air Delivery). l0 c.f.m. FAD will sustain a constant 72 psi. through a nozzle 3mm.
diameter. A compressor of l0 c.f.m. FAD would give the best results with both the
ACE and the CLASSIC gritblasters at the higher pressures. Of course, smaller compressors
(5 c.f.m. upwards) will also work, but will not sustain the higher pressure indefinitely.
with a smaller compressor, you will either have to pause from time to time to allow
the compressor to build up the pressure again, or let the gritblaster work continuously
at the lower pressure (see chart below). the following chart gives an indication
of the pressure you can expect your compressor to sustain when blasting continuously
through the 3mm, 3.5mm & 2.5mm tungsten carbide nozzles
COMPRESSOR SIZE REQUIRED
*NOTE: this is where the top quality tungsten carbide pays dividends. Its low wear
rate enables it to retain its bore diameter longer.
With cheaper nozzles (mild steel or ceramic) the high wear rate means your compressor
cannot sustain its optimum working pressure. The larger nozzle bore means more air
ACE Engineering Products, The Forge, Ousden, NEWMARKET, CB8 8TR U.K