Leybold RUVAC roots pumps are used to increase the Leybold RUVAC roots pumps are used to increase the pumping speed at low pressures, extending the operating pressure range of the fore pumps. The Leybold WS 251 Roots vacuum pumps use air cooled hermetically canned motors . The Leybold WSU 251 Roots vacuum pumps are provided with an additional integrated pressure equalization line.
Specifications
Leybold WSU 251 Roots Pump Specifications
| Model | WS/WSU 251 | |
|---|---|---|
| Pumping Speed 50 Hz | m3/h | cfm | 253 | 149 |
| Pumping Speed 60 Hz | m3/h | cfm | 304 | 179 |
| Ultimate Pressure | mbar | <8 x 10^4 |
| Motor Power 50 Hz | kW | hp | 1.1 | 1.5 |
| Motor Power 60 Hz | kW | hp | 1.4 | 1.9 |
| Nominal Speed 50Hz | rpm | 3000 |
| Nominal Speed 60Hz | rpm | 3600 |
| LVO 400 lube for bearing chamber | litre | .55 |
| Other oil for bearing chamber | litre | .6 |
| Connection Flange | DN | 63 ISO-K |
| Weight WS | kg | lbs | 90 | 198.5 |
| Weight WSU | kg | lbs | 95 | 209.5 |
| Noise Level @ 50 Hz | dB(A) | <58 |
Features
Leybold WSU 251 Roots Pump Features
- Ultimate total pressure <8 x 10-4 mbar
- Vertical or horizontal position
- Hermetically canned motor
- 3000 rpm at @ 50 Hz
- 3600 rpm at @ 60 Hz
- Rugged bearings
- Low Noise <58 dB(A)
- IP 20 Protection
Applications
Leybold WSU 251 Roots Pump Applications
- Large scale research
- Furnaces
- Metallurgy
- Lamps and tubes manufacturing
- Leak testing systems
- High purity gases/refrigerant cycles
- Central vacuum supply systems
- Freeze drying
- Electrical engineering
- Mechanical engineering
- Automotive industry
Compare
| Model | WS/WSU 251 | WS/WSU 501 | WS/WSU 1001 | WS/WSU 2001 | |
|---|---|---|---|---|---|
| Pumping Speed 50 Hz | m3/h | cfm | 253 | 149 | 505 | 297.4 | 1000 | 589 | 2050 | 1207.5 |
| Pumping Speed 60 Hz | m3/h | cfm | 304 | 179 | 606 | 357 | 1200 | 707 | 2460 | 1449 |
| Ultimate Pressure | mbar | <8 x 10^4 | <4 x 10^2 | <4 x 10^2 | <4 x 10^2 |
| Motor Power 50 Hz | kW | hp | 1.1 | 1.5 | 2.2 | 3.0 | 4.0 | 5.4 | 7.5 | 10.0 |
| Motor Power 60 Hz | kW | hp | 1.4 | 1.9 | 2.4 | 3.3 | 4.4 | 6.0 | 8.5 | 11.6 |
| Nominal Speed 50Hz | rpm | 3000 | 3000 | 3000 | 3000 |
| Nominal Speed 60Hz | rpm | 3600 | 3600 | 3600 | 3600 |
| LVO 400 lube for bearing chamber | litre | .55 | .75 | 1.75 | 2.7 |
| Other oil for bearing chamber | litre | .6 | .8 | 1.8 | 3.6 |
| Connection Flange | DN | 63 ISO-K | 63 ISO-K | 100 ISO-K | 160 ISO-K |
| Weight WS | kg | lbs | 90 | 198.5 | 130 | 286.7 | 228 | 502.7 | 458 | 1009.9 |
| Weight WSU | kg | lbs | 95 | 209.5 | 135 | 297.7 | 233 | 513.8 | 465 | 1025.3 |
| Noise Level @ 50 Hz | dB(A) | <58 | <52 | <60 | <65 |