UN-250VH Dry Piston Vacuum Pump (formerly the UN-200VH) features an oil- and water-free design ideal for non-corrosive applications. At 125 L/min, this powerful pump is ideal for moderate to heavy duty applications where a clean room environment is required.

  • Oil-free design with no oil mist in exhaust
  • Analog vacuum gauge at inlet port
  • Manual inlet vacuum regulator with inlet filter trap
  • Pumps operate continuously over entire vacuum range
  • On/off switch with a 120V power cord (pump also available in 220V)
  • CE Certified, CSA Certified, IP 30 rated, RoHS Certified


  • Compact design
  • Maintenance free operation
  • Exhaust muffler for low noise level
  • One year warranty


Ideal for non-corrosive applications such as:

  • Altitude simulation
  • Back molecular drag pumps
  • Bubble immersion leak testing
  • Vacuum drying
  • Evacuation of helium bombing chambers
  • Filtration or aspiration
  • Product / package testing
  • Vacuum degassing
  • Medical / hospital / clean room
Maximum Vacuum:
29.3 inHg / 15 Torr
Maximum Flow:
125 L/min / 3.5 CFM
Inlet Port:
1/4" PT
Power Consumption:
Horse Power:
34 x 18.74 x 30.5 cm (13.39 x 7.38 x 12  in)
13 kg (28.66 lbs)

No accessories available.

Manuals / User Guides

UN-250V / UN-250VH Dry Piston Pump Manual

Product Brochures

UN-250V / UN-250VH Dry Piston Pump
UN Series Dry Piston Pumps


UN-250VH Dry Piston Pump Drawing