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

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SKU: 1400 Category: Brand:

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 1×10-4 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
Compliance CSA


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


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