DS 202 Rotary Vane Pump

The DS 202 is a dual-stage oil-sealed rotary vane pump that delivers a pumping speed of 8.3 m3/hr at 50 Hz, or 5.8 CFM at 60 Hz, and a base pressure of < 2 x 10-3 mbar. The DS 202 has a low sound pressure, and has a universal voltage single-phase electric motor, with integral power switch.

An inlet isolation valve is integrated into the pump to close off the inlet port whenever power to the pump is interrupted. This antibackstream valve retains vacuum in the roughing, or foreline, and prevents pump oil from contaminating the vacuum chamber. The DS 202 has a manual gas ballast valve, which when opened, allows the pump to achieve its rated water vapor handling specification.

Product details Related Product


  • Dual Stage design allows low 10-3 mbar operation, low operating temperature, minimal backstreaming at low pressure, good pumping efficiency and gas ballast in the low 10-2 mbar region
  • Worldwide motor available as 1-phase, is suitable for all voltages and frequencies worldwide. Operational voltages are easily selectable, allowing greater flexibility, easy planning and inventory reduction
  • The antibackstream valve and vent device isolates the pump should it stop or be idle, it also prevents inadequate venting and oil contamination of the vacuum system when the pump is switched off, or in case of power fail
  • Socket type IEC320 permits use of standard power cable and eliminates the need to open box and wire the motor
  • Gas ballast valve, when opened, injects dry air into the second stage of the pump, this action increases the temperature of the module which facilitates the outgassing and clean up of water vapor or other condensable gases from the oil
  • Shipped without a power cord, to be ordered separately


Dimensions (WxHxL)
  • 132 mm x 212 mm x 467 mm
Exhaust Connection
  • 25KF DN
Free Air Displacement
  • 50 Hz: 160 L/min
  • 60 Hz: 192 L/min
  • 50 Hz: 9.6 m/h
  • 60 Hz: 6.8 cfm
  • 212 mm
Inlet Connection
  • 25KF DN
Input Voltage
  • 100-120/200-230V ±10%, 50/60 Hz
  • 467 mm
Oil Capacity Min/Max
  • 0.25 / 0.6 l
Pumping Speed (50 Hz)
  • 8.3 m3/h
Pumping Speed (60 Hz)
  • 5.8 cfm
Rotational Speed at 50 Hz
  • 1500 rpm
Ultimate Partial Pressure
  • 10-4 mbar
Ultimate Total Pressure with Gas Ballast
  • 2∙10-2 mbar
Water Vapor Pumping Capacity
  • 100 g/h
Water Vapor Tolerance
  • 15 mbar
  • 25 kg
  • 132 mm



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