These heavy duty oil-free packages provide fast evacuation to the 10 -5 Torr range.
They are ideal for the following applications:

• Roughing ion pumped systems:
  Starting ion pumps in the low 10 -5 Torr range extends cathode life.
  
  
• Backing turbomolecular pumps:
  Since these packages contain no oil, there is no need to vent the turbopump upon system shut down. Also lower backing pressure extends the useful pumping speed
  of the turbo and results in lower base pressure.
  
  
• Roughing cryopumped systems:
  These packages eliminate the possibility of oil contaminating the cryopump charcoal array while pumping during regeneration.
  
  
• Pumping out dewers.
  

BH2-60HD Pump Package Designed for pumping chamber volumes up to 60 liters. These heavy duty pump packages provide reliable oil-free pumping from atmospheric pressure to the 10 -5 Torr range. Operation is fully automatic and interlocked, and these packages are not adversely affected by operator error or power failure. BH2-200A Pump Package Designed for pumping chamber volumes up to 200 liters. Employs 3-stage diaphragm pump and 16 cfm molecular drag pump. Separate control module. Pumps to the 10 -5 Torr range. RS-200 Modular Roughing System Designed for pumping chamber volumes up to 200 liters. A modular oil-free roughing system for user installation. Includes a 16 cfm molecular drag pump, heavy duty diaphragm pump, power supply and pressure switch assembly, and all vacuum fittings and cables. Mechanical installation takes approximately 10 minutes, and electrical hookup about five minutes. Pumps to the 10 -5 Torr range. RS-350 Modular Roughing System Designed for pumping chamber volumes up to 3500 liters. A modular oil-free roughing system for user installation. Includes a 16 cfm molecular drag pump, heavy duty scroll pump, power supply and pressure switch assembly, and all vacuum fittings and cables. Mechanical installation takes approximately 10 minutes, and electrical hookup about five minutes. Pumps to the 10 -6 Torr range.