Engineers search “which nozzle for which hose” because the kit is a series of restrictions: compressor → air hose → pot → blast hose → nozzle. The nozzle orifice sets how much air leaves the system. The blast hose ID must be large enough that friction does not steal pressure before the nozzle.
Rule of thumb used on tank and hull jobs: blast-hose ID about three times the nozzle orifice, and a still larger air (bull) hose from compressor to pot. BLAST APEX portable pots already pair nozzle, hose ID and hose length in the catalogue. Use that pairing. Do not mix a 12 mm nozzle onto a 19 mm hose.
BLAST APEX catalogue pairing (published at 80 psi)
| Model | Nozzle | Hose ID | Hose length | Cleaning rate | Air |
|---|---|---|---|---|---|
| 150 | 5 mm | 19 mm | 5 m | 3–4 m²/h | 1.27 m³/min · 45 CFM |
| 301-R | 6 mm | 19 mm | 5 m | 5–9 m²/h | 2.41 m³/min · 85 CFM |
| 501-R | 8 mm | 25 mm | 7.5 m | 11–15 m²/h | 3.85 m³/min · 135 CFM |
| 601-R | 8 mm | 25 mm | 7.5 m | 11–15 m²/h | 3.85 m³/min · 135 CFM |
| 901-R | 10 mm | 32 mm | 10 m | 15–19 m²/h | 7.08 m³/min · 250 CFM |
| 1001-R | 10 mm | 32 mm | 10 m | 15–19 m²/h | 7.08 m³/min · 250 CFM |
| 2001-R | 12 mm | 38 mm | 10 m | 20–25 m²/h | 7.08 m³/min · 300 CFM |
- Keep the pot close to the blaster. Long blast hose drops pressure.
- Keep the compressor close to the pot. Long, skinny air hose drops CFM.
- Full-flow couplings. Tiny quick-connects choke a 135 CFM setup.
- Measure nozzle bore with a gauge. Replace when it has grown about 1.5 mm over nominal.
We stock tungsten carbide nozzles and 19 mm blast hose as spares. Larger hose IDs ship with the matching pot. WhatsApp the model number and we confirm the kit.