Welch 1407K-11 DuoSeal Vacuum Pump Oil - 1 QT
Welch 1407K-11 DuoSeal Pump Oil is the genuine OEM vacuum pump oil specifically formulated for Welch DuoSeal belt-drive rotary vane vacuum pumps. This high-quality mineral oil ensures optimal performance, deep vacuum levels, and long pump life.
Perfect for laboratories, service shops, and industrial users who need reliable lubrication and excellent vapor handling.
Key Features & Benefits:
- Genuine Welch OEM Formula – Engineered specifically for DuoSeal pumps
- Excellent Vapor Tolerance – Handles water vapor and chemical vapors effectively
- Low Vapor Pressure – Helps achieve and maintain deep vacuum (down to 0.001 Torr)
- High Thermal Stability – Resists oxidation and sludge formation
- Superior Lubrication – Reduces wear on vanes and bearings
- Easy Maintenance – Clear color makes oil condition easy to monitor
Compatible With:
- Welch DuoSeal series pumps
Ideal For:
- Rotary evaporators
- Vacuum ovens and drying
- Laboratory vacuum systems
- Refrigeration and AC service
- Degassing and defoaming applications
Package Includes: 1 × Welch 1407K-11 DuoSeal Vacuum Pump Oil (typically 1 Quart / 0.946 Liter)
Keep your Welch DuoSeal vacuum pump performing at its best with genuine Welch 1407K-11 DuoSeal Oil.
Welch 1407K-11 DuoSeal Pump Oil is the genuine OEM vacuum pump oil specifically formulated for Welch DuoSeal belt-drive rotary vane vacuum pumps. This high-quality mineral oil ensures optimal performance, deep vacuum levels, and long pump life.
Perfect for laboratories, service shops, and industrial users who need reliable lubrication and excellent vapor handling.
Key Features & Benefits:
- Genuine Welch OEM Formula – Engineered specifically for DuoSeal pumps
- Excellent Vapor Tolerance – Handles water vapor and chemical vapors effectively
- Low Vapor Pressure – Helps achieve and maintain deep vacuum (down to 0.001 Torr)
- High Thermal Stability – Resists oxidation and sludge formation
- Superior Lubrication – Reduces wear on vanes and bearings
- Easy Maintenance – Clear color makes oil condition easy to monitor
Compatible With:
- Welch DuoSeal series pumps
Ideal For:
- Rotary evaporators
- Vacuum ovens and drying
- Laboratory vacuum systems
- Refrigeration and AC service
- Degassing and defoaming applications
Package Includes: 1 × Welch 1407K-11 DuoSeal Vacuum Pump Oil (typically 1 Quart / 0.946 Liter)
Keep your Welch DuoSeal vacuum pump performing at its best with genuine Welch 1407K-11 DuoSeal Oil.


