Welch 1400B-01 DuoSeal


Use these durable oil-seal pumps for numerous lab vacuum needs, including Schlenk drying lines, freeze drying, degassing, concentrations, distillations, and more. Pulley drive enables low rpm operation, reducing oil temperature, friction, and oil degradation. Large oil reservoir minimizes contaminant effects and extends maintenance intervals.

SKU: 4200035 Category:


DuoSeal high vacuum pump Model 1400 is effective for drying using large manifolds (Shlenk lines). 25 lpm flow rate enables thorough drying while providing sufficient cold trap residence time to allow solvents to condense. With ultimate vacuum <0.001 torr, Model 1400 is also suitable for many concentrating, drying, and degassing operations as well as rotary evaporation of low-volatility solvents. Belt-drive design with low pump rpm and large oil capacity contribute to DuoSeal’s reputation for durability.

  • Pumping Speed 0.9 CFM (25 l/min)
  • Max. Vacuum 0.0001 torr
  • Oil Capacity 0.62 qt(0.59 l)
  • Tubing Needed 7/16?(11 mm)
  • Exhaust ./ Intake threads 3/4-20
  • Pump RPM or Wattage 580 RPM, 375W
  • Dimensions LxWxH 17.8″ x 9″ x 12.6″
  • Weight 70 lb (31.8 kg)
  • Wiring 115V, 60 hz

Additional information

Weight 70 lbs
Dimensions 17.8 × 9 × 12.6 in
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