Model: N 840.3 FTP

34 LPM 6 Torr LABOPORT® Vacuum Pump

  • Oil-free diaphragm pump
  • Long, trouble-free life
  • Ideal for use with extremely aggressive gases
  • Gastight (leakage rate ~6 x 10-3 mbar x L/s)
  • Suitable for a wide range of lab applications
  • Available with self-cleaning PowerDry® feature (Model N 840.3 FT.40P)
This pump is suitable for the following applications :
  • Rotary Evaporation
  • Centrifugal Concentration
  • Degassing
  • Desiccation
  • Filtration
  • Fluid Aspiration
  • Gel Drying
  • Solid Phase Extraction
  • Vacuum Ovens
The KNF LABOPORT series of oil-free diaphragm vacuum pumps offer exceptional reliability and performance for a wide range of laboratory applications. These easy-to-use, compact, and quiet pumps are a welcome addition to any lab. Their patented multiport valves tolerate occasional wet vapors and droplets without damage or loss of performance. With a durable, maintenance-free design, LABOPORT pumps provide extended, trouble free performance for busy labs and academic settings.
Always check chemical compatibility for the chemicals that come into contact with your pump.
LABOPORT Pump Testimonial

Our research is concerned with finding and synthesizing novel therapeutics for various cancers. We routinely extract compounds in corrosive, organic solvents and pump them under vacuum to obtain the pure molecules. As such, a high performance pump is an essential tool. Previously, we used oil-lubricated pumps, but these needed significant amounts of maintenance due to corrosive solvents mixing with the oil. We had heard that KNF manufactured a chemically-resistant pump that needed less maintenance and that held the vacuum seal better. After two years, the LABOPORT® pumps have proved very reliable. In fact, they have lasted three times longer than any other pump we have used.

- Patrick Bureau, Research Developer, Aegera Therapeutics, Inc., Canada

  • Gas Flow Rate, L/min (CFM)34 (1.2)
  • Ultimate Vacuum, Torr (mbar)6 (8)
  • Max Continuous Operating Pressure, psig (bar)15 (1.0)
  • Weight, lbs. (kg)27 (12.2)
  • Connection Tubing ID, in. (mm)3/8 (9.5)
  • Permissible Gas and Ambient Temp Range, °C5 to 40 °C
  • Pump HeadPTFE
  • DiaphragmPTFE-coated
  • ValvesFFPM
  • Dimensions L x H x W, in. (mm)13.4 x 8.9 x 6.5 (341 x 226 x 166)
VWR InternationalCall:(800) Buy Now
Ace Glass Inc.Call:(800)
Government Scientific SourceCall:(800)
Midland ScientificCall:(800)
SECO-Scientific EquipmentCall:(800)
Spectrum Chemicals and Laboratory ProductsCall:(800)
Thomas ScientificCall:(800)
Wilkem ScientificCall:(800)