Nozzle Orifice Gauge
NOG
The Airblast Nozzle Orifice Gauge is designed to measure the orifice size of an abrasive blasting nozzle. Proper use of this gauge can determine nozzle orifice wear that causes low nozzle pressure and decreased efficiency in the performance of the nozzles venturi. This wear results in decreased productivity, increased abrasive consumption and improper surface profile.
Airblast Poland sp.zo.o.
Gdyńska 60
80-297 Miszewo
Poland
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Steps to follow
- Unscrew cap from gauge body
- Remove grease pencil from inside body
- Rub grease pencil along the rounded side of the gauge body
NOTE: Area from 3/16” to 5/8” should be marked with grease pencil.
- Screw cap on gauge
- Insert gauge into the back (threaded side) of the blast nozzle
- Rotate gauge against the liner in the nozzle
- Remove gauge and record the line scratched in the grease mark
NOTE: The nozzle should be replaced when the orifice is worn more than 1/16” larger than the original orifice size as this is the point that performance begins to dramatically decline.
Ordering information
| ORIFICE (mm) (“) | |||||||||||||||
| 60 PSI | 4.2 BAR | 70 PSI | 4.9 BAR | 80 PSI | 5.6 BAR | 90 PSI | 6.3 BAR | 100 PSI | 7.0 BAR | 120 PSI | 8.5 BAR | ||||
| 5.0 mm 3/16” | 30.0 171.0 7 | 0.85 77.00 5.3 | 33.0 196.0 8 | 0.93 89.00 5.6 | 38.0 216.0 9 | 1.08 96.00 6.4 | 41.0 238.0 10 | 1.16 108.00 7.1 | 45.0 264.0 10 | 1.27 120.00 7.5 | 58.0 375.0 12 | 1.64 170.00 9.0 | Air Abrasive Power | CFM Lbs./hr. hp | m³/min KG/hr. * kw |
| 6,5 mm 4/16” | 54.0 312.0 12 | 1.53 141.00 9.0 | 61.0 354.0 14 | 1.73 160.00 10.1 | 68.0 408.0 16 | 1.93 185.00 11.6 | 74.0 448.0 17 | 2.10 203.00 12.4 | 81.0 494.0 18 | 2.29 224.00 13.5 | 105.0 660.0 22 | 2.97 300.00 16.2 | Air Abrasive Power | CFM Lbs./hr. hp | m³/min KG/hr. * kw |
| 8.0 mm 5/16” | 89.0 534.0 20 | 2.52 242.00 15.0 | 101.0 604.0 23 | 2.86 274.00 19.1 | 113.0 672.0 26 | 3.20 305.00 20.2 | 126.0 740.0 28 | 3.57 335.00 21.0 | 137.0 850.0 31 | 3.88 385.00 22.9 | 160.0 1.050.0 37 | 4.53 476.00 27.5 | Air Abrasive Power | CFM Lbs./hr. hp | m³/min KG/hr. * kw |
| 9.5 mm 6/16” | 126.0 764.0 28 | 3.57 346.00 21.0 | 143.0 864.0 32 | 4.05 392.00 24.0 | 161.0 960.0 36 | 4.56 425.00 27.0 | 173.0 1.052.0 39 | 4.90 477.00 28.9 | 196.0 1.152.0 44 | 5.55 523.00 33.0 | 235.0 1.475.0 52 | 6.65 669.00 39.6 | Air Abrasive Power | CFM Lbs./hr. hp | m³/min KG/hr. * kw |
| 11.0 mm 7/16” | 170.0 1.032.0 38 | 4.81 468.00 28.5 | 184.0 1.176.0 44 | 5.21 533.00 32.6 | 217.0 1.312.0 49 | 6.14 595.00 36.4 | 240.0 1.448.0 54 | 6.80 657.00 40.1 | 254.0 1.584.0 57 | 7.19 719.00 42.4 | 315.0 2.050.0 69 | 8.92 930.00 50.9 | Air Abrasive Power | CFM Lbs./hr. hp | m³/min KG/hr. * kw |
| 12.5 mm 8/16” | 224.0 1.336.0 50 | 6.34 606.00 37.5 | 252.0 1.512.0 56 | 7.14 686.00 42.0 | 280.0 1.680.0 63 | 7.93 762.00 46.9 | 309.0 1.856.0 69 | 8.75 842.00 51.8 | 338.0 2.024.0 75 | 9.57 918.00 56.3 | 410.0 2.650.0 90 | 11.61 1.202.00 67.6 | Air Abrasive Power | CFM Lbs./hr. hp | m³/min KG/hr. * kw |
Chart shows calculated consumption rates of air and abrasive for new nozzles. When slecting a compressor add 50% to above figures to allow for normal nozzle wear and friction loss.
* Based on abrasive density of 1,5 kgs. per liter.
NOTE: Figures may vary depending upon working conditions. To maintain desired air pressure as nozzle orifice wears, air consumption increases. The effects of nozzle wear on air consumption must be considered when selecting nozzles and the compressors that support them.
