UN-400VH Dry Piston Vacuum Pump features an oil- and water-free design ideal for non-corrosive applications. At 325 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)
  • 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:
325 L/min / 11.4 CFM
Inlet Port:
1/2" PT
Power Consumption:
Horse Power:
45 x 35 x 28 cm (17.72 x 13.78 x 11.02  in)
29 kg (63.93 lbs)

No accessories available.

Manuals / User Guides

UN-400VH Dry Piston Pump Manual


UN-400VH Dry Piston Pump Pump Curve
UN-400VH Dry Piston Pump Drawing

Product Brochures

UN Series Dry Piston Pumps