Description
Welch 1400 DuoSeal Rotary Vane Vacuum Pump Dual Stage Belt-Drive 115V KF-16
The Welch 1400 DuoSeal is a dual-stage, belt-drive rotary vane vacuum pump designed for demanding laboratory and industrial vacuum applications. It runs on 115V AC and features a KF-16 (KF16 / DNKF16) intake port. This unit has been tested and is in good working condition, pulling to approximately 0.75 micron (the pump was originally rated at 1 micron when new).
Specifications & What's Included
- Manufacturer: Welch Vacuum Technology Inc., Skokie, Illinois — Made in USA
- Model: 1400 DuoSeal
- Pump Type: Dual-stage rotary vane, belt drive
- Pumping Speed: 0.9 CFM displacement
- Ultimate Pressure: 1×10⁻⁴ torr rated; measured pull approximately 0.75 micron on this unit
- Intake Port: KF-16 (KF16 / DNKF16)
- Power: 115V AC, 60 Hz
- Motor: Franklin Electric, Model 4401007413
- Motor Output: 1/3 HP
- Motor Speed: 1725 RPM
- Motor FLA: 4.8 A, Service Factor 1.0
- Motor Frame: 48, Drip-Proof (DP) enclosure, Insulation Class B
- Motor Protection: Type U Thermally Protected (automatic reset)
- Motor Date Code: M95 (manufactured ~1995)
- Removable belt drive cover
- Exhaust mist cover — included
- Exhaust filter housing — included (no filter membrane installed)
- Ships with oil drained — oil must be added before operating
Applications
The Welch 1400 DuoSeal is a workhorse two-stage rotary vane pump widely used wherever a reliable rough-to-medium vacuum is needed. It is commonly used as a backing pump for turbomolecular pumps and diffusion pumps in high-vacuum systems, where it maintains the foreline pressure required for those pumps to operate. Other typical applications include vacuum furnace evacuation, rotary evaporation (Rotovap), freeze drying, epoxy and resin degassing, vacuum distillation, vacuum sterilization, refrigeration system evacuation, backing mass spectrometers, and vacuum centrifuge systems. The dual-stage design allows it to reach deeper ultimate pressures than single-stage pumps, making it suitable for applications that need to get below 1 micron. The belt-drive configuration isolates motor vibration from the pump head, which is useful in vibration-sensitive lab setups. The KF-16 (Klein Flange / NW-16) intake fitting is a standard vacuum quick-connect used widely across laboratory vacuum systems, making this pump straightforward to integrate into an existing vacuum line.
This Welch 1400 DuoSeal Rotary Vane Vacuum Pump has been tested and is in good working condition, pulling to approximately 0.75 micron. The housing shows rust, as visible in the photos. The exhaust filter housing is included along with the exhaust mist cover; no filter membrane is installed. The pump ships with the oil drained — oil must be added before operating the pump. Note that we have multiple units; the one you receive will be in similar but not identical physical condition to the unit photographed. Please review our photo set and contact us with any questions.
Warranty Information
Additional Information
Brand: |
Welch |
Model: |
1400 DuoSeal |
MPN: |
1400 |
Type: |
Rotary Vane Vacuum Pump |
SKU: |
50234 |
Seller Notes: |
Includes exhaust filter housing and exhaust mist cover. No filter membrane installed. Ships with oil drained — oil must be added before use. |
Country/Region of Manufacture: |
United States |
Form Factor: |
Benchtop / Base-Mounted |
Number of Stages: |
2 (Dual Stage) |
Drive Type: |
Belt Drive |
Pumping Speed: |
0.9 CFM |
Ultimate Pressure: |
1x10-4 torr (rated); ~0.75 micron measured |
Intake Port: |
KF-16 (KF16 / DNKF16) |
Power Requirements: |
115V AC, 60 Hz |
Motor Horsepower: |
1/3 HP |
Motor Speed: |
1725 RPM |
Motor FLA: |
4.8 A |
Motor Model: |
Franklin Electric 4401007413 |
Motor Enclosure: |
Drip-Proof (DP) |
Application: |
Vacuum furnace, rotary evaporation, freeze drying, backing pump |
Compatible With: |
Turbomolecular pumps, diffusion pumps, mass spectrometers |
Pump Fluid: |
Oil (ships drained — oil required before operation) |
Condition Notes: |
This Welch 1400 DuoSeal Rotary Vane Vacuum Pump has been tested and is in good working condition, pulling to ~0.75 micron. Housing shows rust. Ships oil-drained — oil required before use. Exhaust filter housing included; no filter membrane installed. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
