Robust root pump. Three-motor connection structure. Reduces wear parts and achieves long lifespan.
The Ellicon Leybold Roots pumps (mechanical booster pumps) have the following four series: - Roots vacuum pump RUVAC WA/WAU: air-cooled, flange-type motor* - Roots vacuum pump RUVAC WS/WSU: air-cooled, canned motor** - Roots vacuum pump RUVAC WH/WHU: water-cooled, hermetic motor*** - Roots vacuum pump RUVAC WSLF: for laser gas systems *In the flange-type motor, the motor and pump drive shaft are directly connected by a coupling, and the drive shaft is sealed with a shaft seal. **In the canned motor, the rotor and stator inside the motor are separated by a non-magnetic airtight can. The rotor side is in a vacuum, but it does not use a shaft seal that would wear out. ***The hermetic motor has all components of the motor assembly incorporated within the vacuum, eliminating the need for a shaft seal, making it the most compact and efficient motor technology.
Inquire About This Product
basic information
Among the roots pumps of the Erikon Libolt, the WAU, WSU, and WHU are equipped with a bypass line that includes a differential pressure valve connecting the intake and exhaust ports, allowing for simultaneous activation with the auxiliary pump from atmospheric pressure, while also increasing the exhaust speed even at high intake port pressures.
Price range
Delivery Time
Applications/Examples of results
【WA/WAU251, WA/WAU(H)501～2001】 - Vacuum Coating - Chemicals / Pharmaceuticals - Metals / Heating Furnaces - Packaging - Central Vacuum Supply System - Freeze Drying - Electrical Engineering - Mechanical Engineering - Automotive Industry 【WS/WSU251, WS/WSU(H)501～2001】 - Large-Scale Research - Metals / Heating Furnaces - Light Bulb and Vacuum Tube Manufacturing - Freeze Drying - Leak Testing Systems - Electrical Engineering - High Purity Gas / Refrigerant Circulation Cycle - Mechanical Engineering - Automotive Industry 【WH700】 - Semiconductor Manufacturing - Vacuum Coating - Metals / Heating Furnaces - Central Vacuum Supply System - Freeze Drying - Leak Testing Systems - Electrical Engineering - High Purity Gas / Refrigerant Circulation Cycle - Mechanical Engineering - Automotive Industry 【WH/WHU 2500/4400/7000】 - Vacuum Coating - Large-Scale Research - Metals / Heating Furnaces - Central Vacuum Supply System - Leak Testing Systems - Electrical Engineering - High Purity Gas / Refrigerant Circulation Cycle - Mechanical Engineering - Automotive Industry
Line up（11）
| Model number | overview |
|---|---|
| WA/WAU 251 | Design exhaust speed: 253m3/h (50Hz), 304m3/h (60Hz) Achievable total pressure: 8x10E-4mbar Air-cooled flange type motor structure |
| WA/WAU(H) 501 | Design exhaust speed: 505m3/h (50Hz), 606m3/h (60Hz) Achievable total pressure: 4x10E-2mbar Air-cooled flange type motor structure |
| WA/WAU(H) 1001 | Design exhaust speed: 1000m3/h (50Hz), 1200m3/h (60Hz) Achievable total pressure: 4x10E-4mbar Air-cooled flange type motor structure |
| WA/WAU(H) 2001 | Design exhaust speed: 2050m3/h (50Hz), 2460m3/h (60Hz) Achievable total pressure: 4x10E-2mbar Air-cooled flange type motor structure |
| WS/WSU 251 | Design exhaust speed: 253m3/h (50Hz), 304m3/h (60Hz) Achievable total pressure: 8x10E-4mbar Air-cooled canned motor structure |
| WS/WSU(H) 501 | Design exhaust speed: 505m3/h (50Hz), 606m3/h (60Hz) Achievable total pressure: 4x10E-2mbar Air-cooled canned motor structure |
| WH700 | Design exhaust speed: 710m3/h (50Hz), 860m3/h (60Hz), 1150m3/h (80Hz using inverter motor), 1730m3/h (120Hz using inverter motor) Water-cooled hermetic motor |
| WH/WHU 2500 | Design exhaust speed: 2500m3/h (50Hz), 3000m3/h (60Hz), 4000m3/h (80Hz using inverter motor), 5000m3/h (100Hz using inverter motor) Water-cooled hermetic motor |
| WH/WHU 4400 | Design exhaust speed: 4400m3/h (50Hz), 5280m3/h (60Hz), 7040m3/h (80Hz with external inverter) Water-cooled hermetic motor |
| WH/WHU 7000 | Design exhaust speed: 7000m3/h (50Hz), 8400m3/h (60Hz), 9800m3/h (70Hz using external inverter) Water-cooled hermetic motor |
| WSLF 1001 | Design exhaust speed: 1000m3/h (50Hz), 1200m3/h (60Hz) For laser gas systems, hydrocarbon-free |
catalog（1）
Download All Catalogs
Company information
Leybold is a pioneer in vacuum components such as vacuum pumps, vacuum gauges, and leak detectors. Leveraging over 170 years of experience in vacuum technology, we provide our customers with a wide range of expertise in processes and applications, supported by a global sales and service network. In 2016, Leybold joined the Atlas Copco Group. Since then, we have upheld the brand goal of "Pioneering products. Passionately applied," continuing to deliver innovations in vacuum technology.