A Guide to Selecting Vacuum Pumps


Choosing a vacuum pump for your application depends on your desired vacuum level:

Gast Vacuum/Pressure Diaphragm Pump with Vacuum Gauge, Dual Series Head

Gast Vacuum/Pressure Diaphragm Pump with Vacuum Gauge, Dual Series Head

  • Ultimate vacuums down to 0.3 mbar (0.2 Torr):
    • Diaphragm Vacuum Pumps
    • Piston Vacuum Pumps
    • Venturi Vacuum Pumps
  • Ultimate vacuums down to 2 x 10-3 mbar (1.5 x 10-3 Torr):
    • Rotary Vane Vacuum Pumps
  • Ultimate vacuums down to 1 x 10-8 mbar (7.5 x 10-9 Torr):
    • Turbomolecular Vacuum Pumps

Also consider the following characteristics, which may influence which vacuum pump you choose:

  • Chemical compatibility. Determine the compatibility of the gases used with the pump and any potential issues with the process gas (such as moisture)
  • Pumping speed (volume flow) and pressure requirements. Assess the vacuum pump’s capability to produce both the required pumping speed (volume flow) and throughput (mass flow) against the process’s needs by using the equation Q (gas load) = S (pumping speed) x P (pressure) calculation
  • Pump Installation. Include port connections and requirements for ancillary equipment, such as a roughing pump, in your selection
  • Pump Maintenance. This covers frequency of maintenance cycles and the necessary level of expertise to carry out the service
  • Costs. Consider not only the initial purchase price of the vacuum pump but also the operating costs, maintenance cycles, and associated costs

View our selection of vacuum pumps.

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