But even the variety of today’s screw pumps with variable pitch differs substantially. Most pumps in the 600 m3/h-class require a typical furnace operating pressure 1 mbar an output of approximately 10 kW a significantly higher value compared to a rotary vane pump. The screw pumps of the DRYVAC achieve here through the optimization of the mechanical rotor design, the innovative concept of the motor and selecting a perfectly customized built-in frequency converter a much lower energy balance series of Oerlikon LEYBOLD vacuum with high, reliable performance. The power consumption of the DRYVAC is only 650 S is still 6.9 kW at 1 mbar and even below that of a comparable rotary vane pump. It is therefore a new benchmark for power consumption of vacuum pumps. The built-in frequency converter offers further potential for energy savings and greater process control.

Many process steps need not be the full Suction capacity, particularly when operating in coarser pressure conditions, during the up water. well. Soft start and slow ramp-up can be realised via the frequency converter. The Chamber pressure is controllable via the variable speed control. Realize the customer can even process-specific standby conditions”, taking into account certain valve positions, E.g. to reduce the consumption of nitrogen powered up. In addition to these environmental aspects enables the DRYVAC the modern construction also on sensitive components, such as shaft seals, to dispense motor bearings or couplings, which significantly increase the robustness and reliability of the pump. In addition to the energy-saving benefits through the use of modern screw vacuum pump offer similar opportunities to use of modern roots pumps or through optimized operation of rotary vane pumps and diffusion pumps. In the latter case, at intelligent control, offer even a potential savings of more than 30 percent.