Description
Blast unit construction allows most common types and sizes of abrasives to be used – i.e. metallic (steel wire blasting medium, blasting grit, steel granulate) and non-metallic (sand, slag, and corundum). The type and size of the abrasive depends on the base material of treated components, their original surface, and the required final coating.
A blast unit attendant, wearing safety jetting devices, controls the blasting process with a pneumatic safety remote control placed at the end of jet hose. This system has the ON/OFF positions, and it controls the closing valve (bell) of the tank filling mouth. If the blast machine, part of which is the blast unit, has an automatic abrasive back haul (blast chambers), the attendant controls the blast unit tank filling with the remote control.
| Jet unit type | DBS-100RCS | DBS-200RCS | ||
|---|---|---|---|---|
| Maximum working over-pressure | MPa | 1 | 1 | |
| Optimum working over-pressure | MPa | 0,4 – 0,8 | 0,4 – 0,8 | |
| Pressure tank capacity | litre | 100 | 200 | |
| Maximum pressure tank filling | ||||
|
kg | 300 | 600 | |
|
kg | 136 | 272 | |
| Unit height | mm | cca 1350 | cca 1600 | |
| Tank diameter | mm | 508 | 610 | |
| Wheel diameter | mm | 250 | 350 | |
| Unit weight | kg | cca 125 | cca 155 | |
| Compressed air connection | ||||
|
6/4″ | 6/4″ | ||
| Compressed air consumption of a jet (p = 0.6 MPa) | ||||
|
m3.hr-1 | 193 | 193 | |
|
m3.hr-1 | 275 | 275 | |
| Remote control | Pneumatic, safety | |||
| Labour capacity – actual jetting time | m2.hr-1 | 6-37 | 6-37 | |
The volume of shot metallic abrasive
The volume of shot metallic abrasive is given in kg/hr, depending on the inner diameter of the jet and the compressed air pressure in the jet.
| Inner diameter | Jet pressure (MPa) | ||||
|---|---|---|---|---|---|
| jets (mm) | 0,45 | 0,50 | 0,60 | 0,70 | 0,75 |
| 6,5 | 360 | 400 | 460 | 510 | 560 |
| 8 | 620 | 680 | 760 | 840 | 920 |
| 9,5 | 860 | 980 | 1090 | 1190 | 1310 |
| 11 | 1170 | 1340 | 1490 | 1640 | 1800 |
| 12,5 | 1520 | 1720 | 1900 | 2100 | 2300 |
The volume of shot non-metallic abrasive
The volume of shot non-metallic abrasive is given in kg/hr, depending on the inner diameter of the jet and the compressed air pressure in the jet.
| Inner diameter | Jet pressure (MPa) | ||||
|---|---|---|---|---|---|
| jets (mm) | 0,45 | 0,50 | 0,60 | 0,70 | 0,75 |
| 6,5 | 180 | 200 | 230 | 260 | 280 |
| 8 | 310 | 340 | 380 | 420 | 460 |
| 9,5 | 430 | 490 | 550 | 600 | 660 |
| 11 | 590 | 670 | 750 | 820 | 900 |
| 12,5 | 760 | 860 | 950 | 1050 | 1150 |
Approximate compressed air consumption
The compressed air consumption is given in m3, depending on the inner diameter of the jet and the compressed air pressure in the jet.
| Inner diameter | Jet pressure (MPa) | ||||
|---|---|---|---|---|---|
| jets (mm) | 0,45 | 0,50 | 0,60 | 0,70 | 0,75 |
| 6,5 | 92 | 100 | 115 | 130 | 138 |
| 8 | 152 | 170 | 195 | 220 | 234 |
| 9,5 | 215 | 240 | 275 | 300 | 334 |
| 11 | 290 | 330 | 370 | 410 | 433 |
| 12,5 | 382 | 430 | 480 | 530 | 576 |