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MSP Vacuum Pump for Model 125R Nano MOUDI™ II Impactor

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Product Details

Vacuum pumps are required to draw the sample flow through MSP cascade impactors and air samplers. The pumps below provide adequate flow rate and vacuum level for specific impactor models. These pumps are packaged with all the necessary accessories (fittings, filters and electrical cord) for reliable operation and optimum performance.

These vacuum pumps work according to the rotary vane principle. An eccentrically installed rotor rotates in the cylinder. The centrifugal force of the rotation pushes the vanes, which glide in slots in the rotor, towards the cylinder wall. The vanes separate the sickle-shaped space between rotor and cylinder into chambers. When the chambers are connected with the inlet channel, gas is sucked in, compressed by the next rotation and pushed into the oil separator. Differential pressure constantly causes oil to be passed into the compression chambers. The oil and medium are then discharged into the oil separator and there separated from the exhaust air by gravity and the exhaust filter. Oil collects on the bottom of the oil separator and is passed into the compression chamber again (oil circulation).


  • Rotary vane, oil-sealed pump with a thermally protected motor (0.90 kW, 115VAC or 230 VAC, 50-60 Hz, 20 kg)
  • Sound level: < 72 dB (A)
  • Ambient Temperature: 0 to 40 °C
  • Reliable, long term operation
  • Smooth, pulsation free flow
  • Regulatory Approval: CSA, UR, CE

 Vacuum Pump Model Numbers

Impactor Model # Vacuum Pump Model # Power & Notes
125R 0125-98-0100 110V, Used with Relay box supplied with 125R
125R 0125-98-0101 220V, Used with Relay box supplied with 125R

Relationship between airflow and pump pressure

Graph for Vacuum Pump 125R

Operating the vacuum pump at a lower frequency (50 Hz; dotted line) results in a lower air flow than when the pump is operated at a higher frequency (60Hz; solid line).

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