Industrial Overview
Continuous blasting requires a massive, stable volume of compressed air (CFM). The choice between a **Rotary Screw** and a **Reciprocating (Piston)** compressor is the difference between industrial scale productivity and intermittent utility work. For sandblasting, where nozzle pressure must remain constant, the compressor's duty cycle is the primary technical constraint.
Rotary Screw
Engineered for 100% duty cycles. Uses two interlocking helical screws to provide constant, pulse-free airflow for continuous heavy-duty blasting.
Reciprocating
Engineered for intermittent use. Uses pistons to compress air into a receiver. Ideally suited for small workshops or spot-blasting tasks.
Blasting Performance Table
| Metric | Reciprocating (Piston) | Rotary Screw (APEX) |
|---|---|---|
| Duty Cycle | 60% - 70% (Needs Cool Down) | 100% (Continuous) |
| CFM Stability | Pulsating / Fluctuating | Constant / Flat-Line |
| Oil Carryover | High (Needs Heavy Filtration) | Minimal (Integrated Separators) |
| Noise Level | 85+ dB (Very Loud) | 65 - 75 dB (Enclosed) |
| Energy Efficiency | Lower at high load | High (VFD Compatible) |
| Blasting Nozzles | Small (1/4" and below) | Large (Up to 1/2" Venturi) |
Reciprocating Choice
- Low initial capital expenditure.
- Simple mechanical repairs in the field.
- Suitable for spot-repairs and touch-ups.
Rotary Screw Choice
- 24/7 continuous blasting capability.
- Low maintenance frequency (8000hr service).
- Critical for maintaining Sa 2.5 production.