Welch 1400B-01 DUOSEAL Belt Drive Vacuum Pump 115V

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Welch 1400B-01 DuoSeal Vacuum Pump (115V 60Hz 1PH) is a ready-to-run, complete belt-drive rotary vane pump. It offers 0.9 CFM pumping speed and reaches 1×10⁻⁴ Torr ultimate vacuum. Perfect for small lab applications including Schlenk lines, vacuum ovens, freeze drying, and degassing. The legendary belt-drive system lowers RPM for cooler, quieter operation and exceptional longevity. Comes with initial fill of DuoSeal oil. The Welch 1400B-01 DuoSeal Vacuum Pump is a rugged and robust vacuum pump for applications requiring pressures < 1 Torr. The Welch vacuum pump 1400B-01 achieves < 0.0001 Torr with a pumping speed of 25 liters/min (0.9 CFM). Rugged oil-seal pumps for a wide variety of vacuum needs, including Schlenk drying lines, freeze drying, degassing, concentrations, distillations, and more. Pulley drive enables low pump rpm operation – reduces friction, oil temperature, and oil degradation. Large oil reservoir minimizes contamination effects and extends maintenance intervals. Use of a cold trap is recommended to protect the pump and enhance vacuum levels. Two stage, oil sealed vacuum pumps should not be operated continuously at pressures above 1 Torr. Operating this DUOSEAL pump at higher pressure will induce excessive oil spraying from the exhaust of the vacuum pump causing premature failure and void warranty. Please consult your Chemtech Scientific Representative for consultation, should the ultimate pressure of your process run above 1 Torr.
What's included	1 qt DuoSeal vacuum pump oil, 1407K-11
Common accessory, not included	Exhaust filter 1417
Pumping Speed	0.9 CFM (25 l/min)
Max. Vacuum	0.001 torr
Oil Capacity	0.62 qt(0.59 l)
Tubing Needed	7/16"(11 mm)
Exhaust / Intake threads	3/4-20
Pump RPM	580
Dimensions LxWxH	17.8"x9"x12.6"
Weight	70 lb (31.8 kg)
Wiring	115V, 60 hz

Frequently Asked Questions

Q: What is the pumping speed of the Welch 1400B-01?

A: The Welch 1400B-01 has a pumping speed of 0.9 CFM (25 L/min).

Q: How often should I change the oil?

A: We recommend changing the oil every 3,000–4,000 hours of operation or every 6 months, whichever comes first.

Q: Do you offer repair services and parts for this pump?

A: Yes. We have genuine Welch repair kits and provide full rebuild services for the 1400 series.

Q: Does this pump come fully mounted?

A: Yes, the 1400B-01 is a fully mounted pump, complete with base and motor.

Q: Where can I find the Owner’s Manual for the Welch 1400B-01?

A: The official Welch DUOSEAL Operation and Maintenance Manual for the 1400 series is available for download on our website, Welch 1400B-01 Owner's Manual.pdf . It includes detailed setup instructions, oil change procedures, troubleshooting, and safety guidelines.

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Welch 1400B-01 DuoSeal Vacuum Pump (115V 60Hz 1PH) is a ready-to-run, complete belt-drive rotary vane pump. It offers 0.9 CFM pumping speed and reaches 1×10⁻⁴ Torr ultimate vacuum. Perfect for small lab applications including Schlenk lines, vacuum ovens, freeze drying, and degassing. The legendary belt-drive system lowers RPM for cooler, quieter operation and exceptional longevity. Comes with initial fill of DuoSeal oil. The Welch 1400B-01 DuoSeal Vacuum Pump is a rugged and robust vacuum pump for applications requiring pressures < 1 Torr. The Welch vacuum pump 1400B-01 achieves < 0.0001 Torr with a pumping speed of 25 liters/min (0.9 CFM). Rugged oil-seal pumps for a wide variety of vacuum needs, including Schlenk drying lines, freeze drying, degassing, concentrations, distillations, and more. Pulley drive enables low pump rpm operation – reduces friction, oil temperature, and oil degradation. Large oil reservoir minimizes contamination effects and extends maintenance intervals. Use of a cold trap is recommended to protect the pump and enhance vacuum levels. Two stage, oil sealed vacuum pumps should not be operated continuously at pressures above 1 Torr. Operating this DUOSEAL pump at higher pressure will induce excessive oil spraying from the exhaust of the vacuum pump causing premature failure and void warranty. Please consult your Chemtech Scientific Representative for consultation, should the ultimate pressure of your process run above 1 Torr.
What's included	1 qt DuoSeal vacuum pump oil, 1407K-11
Common accessory, not included	Exhaust filter 1417
Pumping Speed	0.9 CFM (25 l/min)
Max. Vacuum	0.001 torr
Oil Capacity	0.62 qt(0.59 l)
Tubing Needed	7/16"(11 mm)
Exhaust / Intake threads	3/4-20
Pump RPM	580
Dimensions LxWxH	17.8"x9"x12.6"
Weight	70 lb (31.8 kg)
Wiring	115V, 60 hz