RUVAC WS/WSU (W) PFPE Roots Vacuum Pumps with Water-Cooled Canned Motors
| Advantages to the User | Typical Applications | Supplied Equipment |
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- Two series, each with four models - Highly leak-tight air-cooled pumps driven by a water-cooled canned motor - RUVAC WS/WSU(W) PFPE lubricated with perfluoropolyether (PFPE) - WS and WS PFPE pumps are identical except for the lubricant and the shipping package - No thermal problems due to the speed independent cooling arrangement using a separately connected fan, thus no thermal problems at low speeds - Over-temperature switch in the stator coil of the motor - All elastomer seals made of FPM/Viton - Integrated pressure equalization line with differential pressure valve prevents overloading on WSU model - RUVAC WS 251 to 2001 for use with a frequency inverter for a wide frequency range - No shaft feedthrough to the atmosphere, thus particularly leaktight - Pumping direction may be changed as required |
- For applications which require a
high pumping speed at pressures
between 10-2 and 10-4 mbar
(0.75 x 10-2 and 0.75 x 10-4 Torr) - Used where the possibility of contamination due air ingress or pumped media leakage must be avoided - Suction or pumping of high-purity or radioactive gases - Is used in clean rooms were the air must not be recirculated by the motor‘s fan |
- The required oil or PFPE filling is
included in separate bottle (exceptions
are marked) - PFPE is used as standard - Purged with nitrogen for corrosion protection - Gasket in the intake flange with integrated dirt sieve |