Liquid Ring Pump
- Accommodating to water & solvents
- Very Forgiving

Rotary Vane, Oil-Sealed Mechanical Pump

Rotary Vane Pump
- Compact
- Sensitive to solvents

Dry Vacuum Pumps
One Stage Roots Blower Pump Assembly

Roots Blower Pump
- Dry Running
- High operating speeds
High Vacuum Pumps: Oil Diffusion Pumps

Pump Construction

How Diffusion Pumps Work


Condensers to Enhance Vacuum
pV = nRT è
- volume is reduces in transitioning from vapor phase to liquid phase, or vapor pressure decreases with temperature