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Roots vacuum pumps for zone 1

Plant Processing
Roots vacuum pumps for zone 1

The area of application for roots vacuum pumps from the Ruvac series has been expanded to include explosion hazard areas. These pumps have been marketed for many years as Atex Category 3 equipment for deployment in zone 2 inside and outside and have now been also qualified as Atex Category 2 equipment for deployment in zone 1 inside and outside. Whereas when deployed in zone 2 the probability of the occurrence of an ignitable mixture during normal operation is very low and the duration only short, such an occurrence in zone 1 needs to be expected during normal operation with a certain probability. Ruvac pumps belonging to Atex Category 2 have therefore been designed inside and outside such that they ensure an increased level of safety. Ruvac WA 251, 501, 1001 and 2001 operate in the pumping speed range of 250 to 2000 m3/h and are equipped with a temperature sensor which measures the gas temperature at the hottest point of the pump. Through this sensor the pump is shut down as soon as the approved temperature range is exceeded. All WA models can be equipped with motors rated for different voltages. Operation in the frequency range from 30 to 60 Hz is possible. The Atex roots vacuum pumps are air-cooled, thereby reducing the operating cost compared to water-cooled pumps.

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