Full Spec Sheet
Access the complete technical document with performance tables, material specifications, and installation dimensions.
Rotary lobe blowers from Robuschi are engineered for high-efficiency air movement in pressure and vacuum applications. This technical data asset consolidates performance specifications for the full RBS series—from compact units like RBS 15 to high-capacity models like RBS 205—covering flow rates, pressure differentials, motor sizing, acoustic profiles, and material standards.
Use this page to compare blower configurations and select the right unit for your application.
Performance Overview
All data is based on atmospheric air at:
- Pressure: 1,013 mbar
- Temperature: 20°C
- Humidity: 50%
- Density: 1.2 kg/m³
For non-standard gases or operating conditions, contact Robuschi.
Key Parameters
- Q1 (m³/min): Flow rate
- DT (°C): Temperature rise
- Nsof (kW): Absorbed power
- Nmot (kW): Recommended motor power
- Lp(A) sc: Sound pressure level at 1m without enclosure
- Lp(A) cc: Sound pressure level at 1m with enclosure
Model Highlights
| Model | Max Flow (m³/min) | Max Nmot (kW) | Max Lp(A) sc (dB) |
|---|---|---|---|
| RBS 15 | 4.6 | 7.5 | 87 |
| RBS 25 | 5.8 | 7.5 | 90 |
| RBS 35 | 8.9 | 15 | 92 |
| RBS 45 | 12.7 | 30 | 95 |
| RBS 55 | 17.3 | 45 | 101 |
| RBS 65 | 24.2 | 55 | 107 |
| RBS 75 | 28.5 | 75 | 103 |
| RBS 85 | 42.0 | 110 | 106 |
| RBS 95 | 46.3 | 90 | 102 |
| RBS 105 | 60.3 | 118 | 105 |
| RBS 115 | 72.0 | 142 | 102 |
| RBS 125 | 92.5 | 180 | 105 |
| RBS 126 | 130.5 | 110+ | 106 |
| RBS 135 | 111.5 | 132 | 96 |
| RBS 145 | 162.0 | 355 | 105 |
| RBS 155 | 201.5 | 500 | 100 |
| RBS 165 | 179.4 | 251 | 106 |
| RBS 175 | 242.3 | 475 | 113 |
| RBS 205 | 263.3 | 522 | 109 |
| RBS 225 | 398.8 | 546 | 109 |
Material Standards
All components meet international standards:
- Rotors & Shafts: EN 1563 GJS 400-15, DIN 1696 0.7040, ASTM A536 GR 60-40-18
- Casing & Covers: EN 1561 G250, DIN 1691 0.6020, ASTM A48 GR 30
- Gears: EN 10084 18NiCrMo5, DIN 17212 1.6523, ASTM A534 Cl 4720
Custom material configurations are available on request.
Acoustic Performance
Sound pressure levels are measured per ISO 3746:
- Without enclosure (Lp(A) sc): 74–113 dB(A)
- With enclosure (Lp(A) cc): <70–85 dB(A)
Noise enclosures reduce sound levels by 10–25 dB(A), depending on model and operating conditions.
Installation & Dimensions
- Max discharge temperature: 150°C (160°C for R-F configurations)
- Minimum RPM: Model-specific; resonance risks at low speeds
- Flange drilling: UNI PN10 or ANSI 125 FF
- Pressure gauge connection: G3/8”
- Flow direction: Vertical, top to bottom
Refer to pages 29–34 of the spec sheet for full layout drawings and weights.
FAQs
Nsof is the actual absorbed power. Nmot is the recommended motor power to safely handle that load.