Vacuum Technology Book, Volume II

4.4.4 Accessories

Dust separators (SAS) are available as an accessory for the screw pumps. There are various types available to fit the connection flange on the pump.

D1 type Diester oil is used as operating fluid.

HeptaDry series
Model Pumping speed at 50 Hz Pumping speed at 60 Hz Ultimate pressure at 50 Hz Ultimate pressure at 60 Hz
Hepta 100 P 110 m³ · h-1 130 m³ · h-1 < 5 · 10-2 hPa < 1 · 10-2 hPa
Hepta 200 P 220 m³ · h-1 265 m³ · h-1 < 5 · 10-2 hPa < 1 · 10-2 hPa
Hepta 300 P 320 m³ · h-1 410 m³ · h-1 < 5 · 10-2 hPa < 1 · 10-2 hPa
Hepta 400 P 350 m³ · h-1 420 m³ · h-1 < 5 · 10-2 hPa < 1 · 10-2 hPa
Hepta 600 P 525 m³ · h-1 630 m³ · h-1 < 5 · 10-2 hPa < 1 · 10-2 hPa

Table 4.13: HeptaDry performance data

Operating principle of an air cooled multi-stage Roots pump

Figure 4.9: Operating principle of an air cooled multi-stage Roots pump

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