Air & Abrasive Consumption Chart - Marco BLASTMASTER 123P Operator's Manual

Failure to comply with ANY NOTICE listed below could pose a hazard to personnel or property.
 See Air & Abrasive Chart for estimated abrasive consumption rates and required air flow (cubic feet per minute).
Your system must meet these minimum requirements to ensure proper function and performance.
 When it comes to air & abrasive mixtures, more is not necessarily better. Optimum abrasive blasting efficiency
takes place when a lean air & abrasive mixture is used. To correctly set the abrasive metering valve, begin
with the valve fully closed and slowly increase the amount of abrasive entering the airstream. As you increase
the abrasive flow, watch for a "blue flame" at the exit of the abrasive blasting nozzle. Faster cutting, reduced
abrasive consumption and lower clean up costs, are benefits of the "blue flame".
 Abrasive blasting at optimal pressure for the abrasive used is critical to productivity. Example: For an abrasive
with an optimal abrasive blasting pressure of 100 psi at the abrasive blasting nozzle, one pound per square inch
of pressure loss will reduce abrasive blasting efficiency by 1.5%. A 10 psi reduction in air pressure will cause a
15% loss of efficiency. Use a Needle Pressure Gauge to identify pressure drops in your system. Consult with
your abrasive supplier for the requirements of your abrasive.
Inspect abrasive blasting
nozzle before placing
into service. Damage to
abrasive blasting nozzle
liner or jacket may occur
during shipping. If you
receive a damaged
abrasive blasting
nozzle, contact your
distributor immediately
for replacement. Abrasive
blasting nozzles placed
into service may not
be returned. Abrasive
blasting nozzle liners are
made of fragile materials
and can be damaged
by rough handling and
striking against hard
surfaces. Never use a
abrasive blasting nozzle.
Replace abrasive blasting
nozzle if liner or jacket
is cracked or damaged.
Replace abrasive blasting
nozzle if original orifice
size has worn 1/16" or
more. Determine abrasive
blasting nozzle wear by
inserting a drill bit 1/16"
larger than original size
of abrasive blasting
nozzle orifice. If the
drill bit passes through
abrasive blasting nozzle,
replacement is needed.
AIR & ABRASIVE CONSUMPTION CHART
Air & Abrasive Consumption Chart*
Nozzle
Orifice
50 60
No. 2 11 13
67 77
(1/8ˮ)
2.5 3
No. 3 26 30
150 171
(3/16ˮ)
6 7
No. 4 47 54
(1/4ˮ) 268 312
11 12
No. 5 77 89
468 534
(5/16ˮ)
18 20
No. 6
108 126
668 764
(3/8ˮ)
24 28
No. 7 147 170
896 1032
(7/16ˮ)
33 38
No. 8 195 224
1160 1336
(1/2ˮ)
44 50
No. 10 308 356
1875 2140
(5/8ˮ)
68.5 79.5
No. 12 432 504
2672 3056
(3/4ˮ)
96 112
*Abrasive consumption is based on abrasive with a bulk density of 100 lbs per Cubic Foot
Figure 1
Pressure at the Nozzle (PSI)
70 80 90 100
15 17 18 20
88 101 112 123
3.5 4 4.5 5
33 38 41 45
196 216 238 264
8 9 10 10
61 68 74 81
354 408 448 494
14 16 17 18
101 113 126 137
604 672 740 812
23 26 28 31
143 161 173 196
864 960 1052 1152
32 36 39 44
194 217 240 254
1176 1312 1448 1584
44 49 54 57
252 280 309 338
1512 1680 1856 2024
56 63 69 75
404 452 504 548
2422 2690 2973 3250
90 100.5 112 122
572 644 692 784
3456 3840 4208 4608
127 143 154 174.5
Blastmaster
Air (in cfm), Abrasive &
Compressor
125 140
Requirements
25 28 Air (cfm)
152 170 Abrasive (lbs/hr)
5.5 6.2 Compressor Horsepower
55 62 Air (cfm)
319 357 Abrasive (lbs/hr)
12 13 Compressor Horsepower
98 110 Air (cfm)
608 681 Abrasive (lbs/hr)
22 25 Compressor Horsepower
168 188 Air (cfm)
982 1100 Abrasive (lbs/hr)
37 41 Compressor Horsepower
237 265 Air (cfm)
1393 1560 Abrasive (lbs/hr)
52 58 Compressor Horsepower
314 352 Air (cfm)
1931 2163 Abrasive (lbs/hr)
69 77 Compressor Horsepower
409 458 Air (cfm)
2459 2754 Abrasive (lbs/hr)
90 101 Compressor Horsepower
663 742 Air (cfm)
3932 4405 Abrasive (lbs/hr)
146 165 Compressor Horsepower
948 1062 Air (cfm)
5570 6238 Abrasive (lbs/hr)
209 236 Compressor Horsepower
123P Remote Control System
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