Diffusion Pumps

As the worldwide diffusion pump market leader, Varian produces the most comprehensive family of pumps, ranging from 2 in. to 35 in. in diameter, and is the only broad-line, U.S.-based manufacturer.


Features
  • High pumping speeds
  • High throughput
  • High forepressure tolerance
  • Low ultimate pressure
  • Excellent backstreaming characteristics
  • Long-term reliability
Download Brochure (Diffusion Pumps.pdf - 611 KB)

HS - 2

Features

  • High pumping performance in a compact package
  • Fractionating jet purifies fluid
  • High tolerable forepressure
  • Stainless steel jet and pump body
  • Standard quick-cool coil
  • Finned boiler increases surface area prolonging fluid life
  • Foreline baffle prevents loss of fluid to backing system

VHS - 4

Features

  • Highest pumping speed
  • Sight glass for immediate inspection of fluid level
  • Fill and drain assembly for pump oil
  • Fractionating jet purifies fluid
  • High tolerable forepressure
  • Full thermal protection
  • Stainless steel pump body and jet
  • Finned boiler increases surface area prolonging fluid life
  • Quick cool coil is standard
  • Optional extended cold cap where increased cleanliness is desired
  • Foreline baffle prevents fluid loss to backing system

VHS - 6

Features

  • Highest pumping speed
  • Sight glass for immediate inspection of fluid level
  • Fill and drain assembly for pump oil
  • Fractionating jet purifies fluid
  • High tolerable forepressure
  • Full thermal protection
  • Stainless steel pump body and jet
  • Finned boiler increases surface area prolonging fluid life
  • Quick cool coil is standard
  • Optional extended cold cap where increased cleanliness is desired
  • Foreline baffle prevents fluid loss to backing system

VHS - 250

Features

  • Highest pumping speed
  • Sight glass for immediate inspection of fluid level
  • Fill and drain assembly for pump oil
  • Fractionating jet purifies fluid
  • High tolerable forepressure
  • Full thermal protection
  • Stainless steel pump body and jet
  • Finned boiler increases surface area prolonging fluid life
  • Quick cool coil is standard
  • Foreline baffle prevents fluid loss to backing system

VHS - 400

Features

  • Highest pumping speed for its height
  • Sight glass for immediate inspection of fluid level
  • Fill and drain assembly for pump oil
  • High throughput, 5100-watt version available
  • Four-stage fractionating jet purifies fluid
  • High tolerable forepressure
  • Full thermal protection
  • Finned boiler increases surface area prolonging fluid life
  • Quick cool coil is standard
  • Foreline baffle prevents fluid loss to backing system

HS - 16

Features

  • Five-stage fractionating jet purifies fluid
  • High throughput, 9600-watt version now available
  • High tolerable forepressure
  • Full thermal protection
  • Fill and drain assembly for pump oil
  • Sight glass for immediate inspection of fluid level
  • Standard gauge port (NW-25) below inlet flange included
  • Foreline baffle prevents loss of fluid to backing pump system
  • Optional halo baffle reduces backstreaming without adding height
  • Optional quick cool coil

AX - 65 Pump

Features

  • High performance specifications, so it produces higher, cleaner vacuum levels.
  • Fluid-level sight glass indicates the fluid level at all times.
  • Many available combinations of pump configuration and flanges optimize the performance and fit for your application.
  • Compact design makes integration into space-limited equipment easy.
  • Full thermal protection guards against all over-temperature conditions.
  • “Pump-ready” thermal switch can send a signal when the pump is operational.
  • Finned, vertical boiler promotes stable pumping, especially of light gases.
  • Three-stage fractionating jet with ejector stage purifies the fluid, giving higher forepressure tolerance.

HS - 20

Features

  • Five-stage fractionating jet purifies fluid and achieves low base pressure
  • High tolerable forepressure
  • Full thermal protection
  • Sight glass for immediate inspection of fluid level
  • Fill and drain assembly for pump oil
  • Standard gauge port (NW-25) below inlet flange included
  • Foreline baffle prevents loss of fluid to backing pump system
  • Optional halo baffle reduces backstreaming without adding height
Please note that this item is controlled for export by the Nuclear Suppliers Group. Accordingly, you may be required to obtain an export license from the U. S. Department of Commerce prior to exporting this pump from the United States. Please consult the U. S. Export Administration Regulations, ECC

VHS - 10

Features

  • Highest pumping speed
  • Sight glass for immediate inspection of fluid level
  • Fill and drain assembly for pump oil
  • High throughput, 5100-watt version available
  • Fractionating jet purifies fluid
  • High tolerable forepressure
  • Full thermal protection
  • Stainless steel pump body
  • Finned boiler increases surface area prolonging fluid life
  • Quick cool is standard
  • Optional extended cold cap where increased cleanliness is desired
  • Foreline baffle prevents fluid loss to backing system

HS - 32

Features

  • Five-stage stainless stee fractionating jet purifies fluid
  • Full thermal protection
  • Sight glass for immediate inspection of fluid level
  • Fill and drain assembly for pump oil
  • Optional halo baffle cold cap reduces backstreaming without adding height
  • Standard gauge port (NW-25) below inlet flange included
  • Optional quick cool coil
Please note that this item is controlled for export by the Nuclear Suppliers Group. Accordingly, you may be required to obtain an export license from the U. S. Department of Commerce prior to exporting this pump from the United States. Please consult the U. S. Export Administration Regulations, ECCN 2B231, for further guidance.

NHS - 35

Features

  • Five-stage stainless steel fractionating jet purifies fluid
  • High tolerable forepressure
  • Full thermal protection
  • Sight glass for immediate inspection of fluid level
  • Foreline baffle prevents fluid loss to backing system
  • Optional halo baffle cold cap reduces backstreaming without adding height
  • Standard gauge port (NW-25) below inlet flange included
Please note that this item is controlled for export by the Nuclear Suppliers Group. Accordingly, you may be required to obtain an export license from the U. S. Department of Commerce prior to exporting this pump from the United States. Please consult the U. S. Export Administration Regulations, ECCN 2B231, for further guidance.