Schmidt MV3, Руководство по эксплуатации и обслуживанию

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13.1 Table 1 Approximate Air Consumption (CFM) Per Blast Nozzle
NOZZLE PRESSURE
NOZZLE SIZE 60 psi 70 psi 80 psi 90 psi 100 psi 120 psi 140 psi
No.2 1/8" 14 16 18 20 22 26 30
No.3 3/16" 32 36 41 45 49 58 66
No.4 1/4" 57 65 72 80 90 105 121
No.5 5/16" 90 101 113 125 140 160 185
No.6 3/8" 126 145 163 182 200 235 270
No.7 7/16" 170 193 215 240 270 315 360
No.8 1/2" 230 260 290 320 350 410 470
No.10 5/8" 360 406 454 500 550 640 740
No.12 3/4" 518 585 652 720 790 925 1060
13.2 Table 2 Abrasive Consumption (lbs. per hour) Per Blast Nozzle
NOZZLE PRESSURE
NOZZLE SIZE 60 psi 70 psi 80 psi 90 psi 100 psi 120 psi 140 psi
No.2 1/8" 90 105 115 130 140 165 190
No 3 3/16" 205 230 260 290 320 375 430
No.4 1/4" 365 420 460 500 560 660 760
No.5 5/16" 575 650 725 825 900 1050 1200
No.6 3/8" 840 945 1050 1155 1260 1475 1700
No.7 7/16" 1150 1300 1450 1600 1750 2050 2350
No.8 1/2" 1460 1660 1850 2000 2250 2650 3000
No.10 5/8" 2290 2600 2900 3125 3520 4100 4750
No.12 3/4" 3300 3750 4180 4500 5060 5950 6800
13.3 Table 3 Hose Selection Guide (blasting @ 100 Psi)
NOZZLE SIZE No.4 1/4" No.5 5/16" No.6 3/8" No.7 7/16" No.8 1/2"
CFM @ 100psi 90 140 200 270 350
AIR HOSE 1 1/4" 1 1/4" 1 1/2" 1 1/2" 2"
BLAST HOSE 1" 1 1/4" 1 1/4" 1 1/2" 1 1/2"
ABRASIVE (lbs. per hr.) 560 900 1260 1750 2250
13.4 Additional Information on Blasting Productivity
Air volume and pressure are very important. The blasting production rate will increase with higher
blasting pressures and decrease with lower blasting pressures. The National Association of
Corrosion Engineers’ data suggests that for each 1 psi reduction in nozzle pressure, there is a 1.5%
production loss. Pressure drop through a Schmidt® blast unit is normally less than 1 psi, while
blast units manufactured by some of our competitors have pressure losses as high as 12 psi
resulting in an 18% loss of production. Air pressure loss can also be avoided by using the shortest
possible hose of adequate size. The inside diameter of both the blast hose (other than whip hose)
and the air hose should be approximately three times the diameter of the orifice in the blast nozzle.
Standard Schmidt blast units are rated for a maximum pressure of 150 psi. However,
equipment manufactured prior to 2005 can be rated at 125psi. Refer to pressure vessel nameplate.
13.0 Blasting Data