Welch 1400 DuoSeal 0.9 cfm 0.1 Micron Belt Drive Dual-Stage Pump

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  • Regular price $1,990.00

Now every Welch 1400 pump we sell comes complete with a Welch 1417 oil mist exhaust filter (a $170.90 value), see Welch's website below for more details.


The Welch DuoSeal vacuum pumps are known for their ruggedness world-wide. These pumps have large oil reservoirs to dilute contaminants. Low pump rpm to reduces friction and wear while minimizing reservoir temperature to lessen chemical reactivity.

The Welch 1400 DuoSeal belt drive rotary vane is a durable vacuum pump with a superior vapor handling capability. It offers an excellent ultimate pressure of 1x10-4 torr. These pumps are commonly used for vacuum furnace evacuation, backing turbomolecular pumps, backing diffusion pumps, rotary evaporation, refrigeration system evacuation, epoxy degassing, vacuum sterilization, backing mass spectrometers, freeze drying, vacuum centrifugal applications, vacuum distillation, space research, and other vacuum processes. These Welch 1400 DuoSeal Belt Drive Pumps have a pumping speed displacement of 0.9 CFM.



 Electrical requirements
 110 Volts 50/60Hz single phase, 1/3 HP 250 watts
 Type  Belt-drive rotary vane mechanical vacuum pump
 Application  Rotary evaporation/distillation 
 Pumping rate
 0.9 cfm
 Oil capacity  0.63 quart / 0.6 liter
 Ult. vacuum pressure
 0.1 micron
 Motor speed  580 rpm
 Intake ID (vacuum connection)
 7/16 inch
 Intake/exhaust thread size  3/4-20
 Adjustable vac./gas ballast  Yes
 Pump dimensions (LxWxH)
 17.8 x 9 x 12.6"
 Shipping dimensions (LxWxH)
 20.5 x 13.8 x 14.5"
 Pump weight
 70 Lb
 Manual  Click here to download


Standard package

 Part description


Part image

 Welch 1400 DuoSeal belt drive rotary vane dual stage pump
1 pc

 Welch 1417 oil mist exhaust filter
1 pc
 User's manual
1 pc