Welch
Was:
$750.00
Was:
$1,500.00
Welch Duo-Seal Belt-Drive Oil-Sealed Vacuum Pump 3/4 HP 115/208-230V 1725 RPMThe Welch Duo-Seal is a classic oil-sealed rotary vane vacuum pump with belt-drive design, widely used in laboratory,...
46991
- SKU:
- 46991
- Availability:
- Usually ships within 2–3 business days via freight.
- Weight:
- 230.00 LBS
- Brand:
- Welch
- Model:
- Duo-Seal
- MPN:
- Duo-Seal
- Type:
- Belt-Drive Oil-Sealed Rotary Vacuum Pump
- SKU:
- 46991
- Motor Brand:
- Dayton
- Motor Model:
- 6K376D
- Motor Power:
- 3/4 HP
- Motor Voltage:
- 115V / 208-230V AC
- Motor Current:
- 10.8A (115V) / 5.3-5.4A (208-230V)
- Motor Speed:
- 1725 RPM
- Motor Phase:
- Single Phase
- Motor Frequency:
- 60 Hz
- Motor Frame:
- H56
- Drive Type:
- Belt Drive
- Drive Belt:
- 4L490 Demco
- Ultimate Vacuum:
- Less than 0.05 micron at 300 RPM
- Vacuum Achieved (Tested):
- Approx. -28 in Hg (measured at our facility)
- Oil Type:
- Duo-Seal proprietary oil (required)
- Pump Design:
- Oil-sealed rotary, vintage belt-drive
- Manufacturer Location:
- Chicago, IL, USA
- Country/Region of Manufacture:
- United States
- Power Requirements:
- 115V or 208-230V AC, 60 Hz, Single Phase
- Form Factor:
- Benchtop / Base-Mounted
- Shipping Method:
- Freight – oil drained prior to shipment
- Seller Notes:
- Tested working at facility. Ships freight with oil drained. Buyer must add Duo-Seal oil before use.
- Review Status:
- Auto-Approved (needs review) 2026-07-04
- Condition Notes:
- Welch Duo-Seal belt-drive vacuum pump tested and working at facility, pulling approximately –28 in Hg. Age-related wear, paint loss, surface rust on motor pulley and flywheel, intact belt.
- Motor Horsepower:
- 3/4 HP
- Motor Current (115V):
- 10.8 A
- Motor Current (208-230V):
- 5.3–5.4 A
- Motor Frame Size:
- H56
- Tested Vacuum Performance:
- Approximately –28 in Hg
- Manufacturer:
- W.M. Welch Mfg Co
- Country of Manufacture:
- United States
- Compatible Applications:
- Laboratory, industrial, HVAC degassing, lab research systems
