Full Product Manual
Access the official Welch manual for DuoSeal Model 1374 to get specifications, installation instructions, maintenance schedules, and troubleshooting guidance.
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The Welch DuoSeal Model 1374 is a belt-driven rotary vane vacuum pump built for continuous-duty operation. It’s engineered to deliver deep vacuum levels with low maintenance and long service life. If you're running sensitive lab processes, vacuum distillations, or industrial degassing, this pump handles sustained workloads without overheating or oil degradation.
The pump operates at 1.1 CFM (31 L/min) and achieves an ultimate vacuum of 0.001 Torr. Its rugged cast iron construction and direct shaft coupling reduce vibration and wear. The DuoSeal series is known for its quiet operation and oil filtration system that minimizes contamination and extends oil life.
Key Features
- Vacuum Performance: 0.001 Torr ultimate vacuum
- Flow Rate: 1.1 CFM (31 L/min)
- Drive Type: Belt-driven rotary vane
- Oil Capacity: 1.5 liters
- Noise Level: ~52 dB
- Applications: Freeze drying, vacuum ovens, filtration, degassing, and more
Maintenance Highlights
- Oil Change Interval: Every 3 months or 500 hours
- Filter Replacement: Inspect monthly; replace as needed
- Belt Tensioning: Check quarterly
- Cleaning: Exterior wipe-down weekly; internal inspection annually
FAQs
Use Welch Vacuum Pump Oil 1407K. Avoid substitutes to maintain vacuum integrity and pump longevity.