Cold Jet Aero V, Operator'S Manual

Page: 21 / 32

17
SECTION 4
APPENDIX A: BLAST AIR QUALITY
IN THIS SECTION
Plant Air (Central Compressed Air System) . . . . . . . . . . . 17
Using Portable Air (85 - 500 hp / 64 - 373 kw) . . . . . . 18
PLANT AIR (CENTRAL COMPRESSED AIR SYSTEM)
Manufacturing plants with central compressed air systems should have an after cooler and a 2-
stage coalescing filter assembly downstream of the receiver tank. Hot metal pipes are an indication
this is needed.
To verify that the plant air system is adequate for the Aero V, the air compressor needs to produce
an air volume 10% greater than the Aero V maximum air volume in addition to the air volume
consumed by normal plant operation.
To determine adequate air volume, watch the pressure gauge while blasting.

If the gauge drops slowly, the compressor is insufficient.

If the gauge drops quickly, there is a restriction or the pipe is too small.

If the gauge stays steady, then the compressor and piping are adequate.
To maintain adequate pressure to the Aero V:

For distances less than 50 ft (15 m) between the air compressor and the Aero V, Cold Jet
recommends a flexible 1 in (25 mm) air hose, preferably the hose supplied with the Aero V.

For distances greater than 50 ft (15 m) between the air compressor and the Aero V, Cold Jet
recommends a larger hose/pipe to maintain adequate blast pressure
If an air drop is seldom used or is being used with the Aero V for the first time, water and rust may
have collected in the line. Before connecting to the air supply, purge the line to prevent
contamination of the Aero V.