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(2) As the rotor has a good geometric Symmetry, its rotational speed is higher than a common oil-
sealing mechanical vacuum pump and at the same pumping speed it has features of smaller
volume and lighter weight.
(3) When the pump is in operation, there is less vibration and its volume operating ratio is
about kv≈ 0.5.
(4) There is no compression in the pump similar than that produced in a mechanical vacuum
pump. So no discharge valve is required but agglutinative steam can be removed.
(5) The pump can be started quickly and a limit vacuum can be reached in a short time.
Except the above features, Vortex B series Roots Pump has it’s own relief valve which functions
to control roots pump's differential pressure between air-inlet and air-outlet. When the
differential pressure is over standard one the relief valve opens automatically. Because the
pump's inlet-outlet is interlinked, some of gas returns to the inlet. At this time, the pump operates
in a constant differential pressure. When the differential pressure is lower than that of a relief
valve, the valve close automatically (shown as Diagram2)
Diagram 2
2.3 Usage and model explanation:
Usage: vacuum degassing, vacuum smelting, vacuum heat treating etc, in metallurgical industry
and can also be used in chemical industry. Foodstuff, medicine, Electrical manufacture etc.
Especially when a water-ring vacuum pump is used for its pump, it can extract the gas with large
steam. So it is much suitable for productive procedures of distillation, evaporation, freezing and
drying etc.
Model explanation: Vortex/Vortex B-5000
Vortex--roots vacuum pump; Vortex B with relief valve 5000--pumping speed 5000m3/h
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