Huckepack Once-Through-Sealing Pumps
Description
The Busch Huckepack Mark 4 vacuum pump is a two-stage, Once-Through-Sealing, rotary vane design. The Mark 4 design allows engineers the flexibility and performance they need for their particular process including the choice of several sealing fluids with different vapor pressures.
The Mark 4 is available in water-cooled (single pass) or radiator-cooled versions. It reaches an end vacuum of 0.5 torr (29.9" Hg), and comes in four sizes, from 113 CFM to 444 CFM.

Features
• Coolant temperature control system
• Optional gas ballast in bottom stage to aid in
pumping high boiling compounds
• Graphite PTFE exhaust and bypass valves
• Adjustable sealant metering pump
• Sealant reservoir and optional flushing tank for
different fluids during flushing cycle
• Wide selection of sealing fluids possible

Mark 4
Radiator Cooled Model

 
Huckepack Operating Principle