The Welch 8905 Direct Drive High Vacuum Rotary Vane Dual Stage Mechanical Vacuum Pump Model 8905A is designed to be used for a variety of applications including vacuum furnace evacuation, backing turbomolecular pumps, backing diffusion pumps, rotary evaporation, and refrigeration system evacuation to name a few. Additionally, the Welch 8905 offers an excellent ultimate pressure of 1x10-4 Torr and has a pumping speed displacement of 1.8 CFM.
Specifications:
- Free Air Displacement: 1.8 CFM (52L/min)
- Pumping speed: 1.5 CFM (43 L/min)
- Ultimate pressure: 1 x 10-4 Torr
- Water vapor tolerance: 6 Torr (30 g/hr)
- Weight: 24.5 lbs (11.1 kg)
 
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