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Welch 1374, DUOSEAL Unmounted Pump, 23 CFM
Welch 1374 DUOSEAL Vacuum Pump – 23 CFM (Unmounted)
The Welch 1374 DUOSEAL is a rugged, high-performance belt-drive rotary vane vacuum pump known for its reliability and deep vacuum capability. With a pumping speed of 23 CFM (650 L/min), it is an excellent choice for laboratory and industrial applications that require strong vacuum performance.
Important Note: This product is an unmounted pump and a component to a complete belt driven vacuum pump. The Welch DuoSeal Unmounted Pump 1374 requires a base, motor and belt to generate vacuum. This product can only be used as a drop in replacement for the pump component of a complete vacuum pump.
Key Features
- 23 CFM (650 L/min) free air displacement
- Ultimate vacuum: 1 × 10⁻⁴ Torr (with gas ballast closed)
- Durable DUOSEAL design with proven long-term reliability
- Large oil reservoir for better cooling and extended oil life
- Low noise and vibration compared to many competitive models
- Easy maintenance with accessible oil drain and fill ports
Ideal Applications
- Laboratory vacuum systems
- Vacuum ovens and drying
- Schlenk lines and glove boxes
- Vacuum distillation
- Degassing and lyophilization
- Industrial and OEM installations
The Welch 1374 is part of the trusted DUOSEAL series, built tough for continuous use in demanding environments. Its belt-drive design allows for easy speed adjustment and serviceability.
Need help building a complete system? We can supply the full mounted pump, base, motor, belt, and accessories.
Questions? Contact our vacuum specialists at (484) 424-9415 — we’re happy to help you choose the right pump for your application.
| Pumping Speed | 23 CFM (650 l/min) |
| Max. Vacuum | 0.001 torr |
| Oil Capacity | 1.25 qt(1.2 l) |
| Tubing Needed | 1-5/8(41) |
| Exhaust / Intake threads | 1.75-20 |
| Pump RPM | 510 |
| Dimensions LxWxH | 26"x13.7"x18.8" |
| Weight | 85 lb (100 kg) |
Welch 1374 DUOSEAL Vacuum Pump – 23 CFM (Unmounted)
The Welch 1374 DUOSEAL is a rugged, high-performance belt-drive rotary vane vacuum pump known for its reliability and deep vacuum capability. With a pumping speed of 23 CFM (650 L/min), it is an excellent choice for laboratory and industrial applications that require strong vacuum performance.
Important Note: This product is an unmounted pump and a component to a complete belt driven vacuum pump. The Welch DuoSeal Unmounted Pump 1374 requires a base, motor and belt to generate vacuum. This product can only be used as a drop in replacement for the pump component of a complete vacuum pump.
Key Features
- 23 CFM (650 L/min) free air displacement
- Ultimate vacuum: 1 × 10⁻⁴ Torr (with gas ballast closed)
- Durable DUOSEAL design with proven long-term reliability
- Large oil reservoir for better cooling and extended oil life
- Low noise and vibration compared to many competitive models
- Easy maintenance with accessible oil drain and fill ports
Ideal Applications
- Laboratory vacuum systems
- Vacuum ovens and drying
- Schlenk lines and glove boxes
- Vacuum distillation
- Degassing and lyophilization
- Industrial and OEM installations
The Welch 1374 is part of the trusted DUOSEAL series, built tough for continuous use in demanding environments. Its belt-drive design allows for easy speed adjustment and serviceability.
Need help building a complete system? We can supply the full mounted pump, base, motor, belt, and accessories.
Questions? Contact our vacuum specialists at (484) 424-9415 — we’re happy to help you choose the right pump for your application.
| Pumping Speed | 23 CFM (650 l/min) |
| Max. Vacuum | 0.001 torr |
| Oil Capacity | 1.25 qt(1.2 l) |
| Tubing Needed | 1-5/8(41) |
| Exhaust / Intake threads | 1.75-20 |
| Pump RPM | 510 |
| Dimensions LxWxH | 26"x13.7"x18.8" |
| Weight | 85 lb (100 kg) |