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The ideal partner for more performance and throughput...

The RUVAC WH will help to make your process more reliable and cost efficient.
RUVAC WH Roots pumps attain the highest pumping speeds and best ultimate pressures with maximum safety in combination with dry compressing vacuum pumps from the DRYVAC, SCREWLINE, and LEYVAC line, or the oil-sealed vacuum pumps of the SOGEVAC line.

Design and Advantages

The RUVAC WH line includes a number of engineering innovations ensuring a long service life with minimum maintenance complexity.

Water cooling advantages
The concept of the hermetically sealed, water cooled motor permits optimum cooling resulting in a very high motor efficiency. Water cooling at the motor permits extreme high motor loads and at the same time high protection against overloads. Apart from a reduced pumpdown time, noise and heat emissions are reduced and the pump is therefore cleanroom compatible. Moreover, water cooling significantly reduces the oil temperature, resulting in improved lubricating properties thereby guaranteeing a long service life for the bearings.

System integration, made easy
The smart design of the pumps with their reduced exhaust flange permits the configuration of different pump combinations without an additional mounting frame. Since the pumps are connected to each other only with an adapter, both investment costs and as well as the system‘s footprint are reduced significantly.

Even faster with bypass line
The RUVAC WHU line was developed for extremely fast pumpdown of loadlock chambers, for example. The utilization of a patented bypass line permits a high additional pumping speed starting at atmospheric pressure thereby significantly reducing pumpdown time. This is significantly faster compared to the utilization of a frequency converter since the pump mechanically controls the pumping speed at full speed of the pump.

No shaft seal, the pump is hermetically sealed
Therefore no shaft seal is needed. This prevents oil leaks and increases safety significantly while pumping sensitive media.

Motor ensures a long service life
The integration of a potted water cooling facility protects the motor against external and internal influences. The lower operating temperature compared to air-cooled motors in combination with the built-in coil protection ensures a long service life. When using the recommended lubricant, the pump will operate for 4 years without any service needed.

Frequency converters optimize the performance
RUVAC WH pumps deliver best performance due to the specially matched frequency converter. The integrated frequency converter optimizes the necessary power consumption and provides the required pumping speed for the variants RUVAC WH 2500 FC, RUVAC WHU 4400 and RUVAC WH 700. Moreover, it protects the Roots pump against thermal overloads, thereby rendering it intrinsically safe.
Using a frequency converter enables the RUVAC WH to support the backing pump in starting at atmospheric pressure. Increasing the rotational speed results in an enhanced pumping speed even at low pressures. This leads to very short pumpdown times and a high process gas throughput.


  • Increased process gas throughput due to significantly enhanced rotational speed

  • Reduced pumpdown time due to operation starting at atmospheric pressure in connection with increased pumping speed at dropping pressures

  • Highest operational reliability through parameter matching to the thermal limit of the pump

  • Pump protection in the event of a cooling water failure through processing the signal of a thermal sensor

  • Saving of power through optimized motor utilization at the operating point

  • Energy saving by reducing the speed during standby operation

  • Flexible matching to the requirements of your specific vacuum application

  • Easy electrical integration through digital and analog interfaces; industrial bus systems are optionally available

The frequency converter contributes significantly to increased reliability at a favourable price-to-performance ratio.

Application flexibility
The RUVAC WH line offers its advantages in all vacuum applications. It excels through extreme ruggedness and durability thereby meeting the requirements of industrial applications. At the same time it fulfills the requirements of solar and coating processes where lowest life-cycle costs, highest system availability and low emissions are required.

Your Benefits:

  • Low investment costs
    through direct adaptation to our line of backing pumps

  • Best price-to-performance ratio
    by increased pumping speed when using a frequency converter

  • Low operating costs
    through the power-saving drive unit in combination with a frequency converter

  • Low life-cycle costs
    due to the elimination of the shaft seal: 4 years without any servicing

  • Highest reliability

    • complete pump protection by the motor concept and the matched frequency converter

    • hermetic sealing thereby suited for pumping toxic and corrosive gases

  • Very fast pumpdown
    by use of the patented bypass line for the WHU types

  • Excellent process adaptation
    and control integration using a frequency converter

  • Optimum system integration
    through reduced installation space

  • Favourable ambient conditions
    by significantly reduced noise and heat emissions

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Your Leybold Team

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