Jet Ejectors

How JET-VAC® Ejectors work

  • A. Steam is fed at high pressure and relatively low velocity into the motive connection.
  • B. Steam expands through the ejector nozzle and changes into a high-velocity/low-pressure stream. When lower than atmospheric pressure, a vacuum is created.
  • C. A low absolute pressure attracts the gases to be pumped from the vacuum vessel.
  • D. Momentum is transferred between fluids, raising the pressure of the fluid being pumped.
  • E. The mixture of fluids then discharges to the discharge line (or the next ejector in multi-stage designs).


JET-VAC Ejectors convert pressure to velocity with no moving parts
    • JET-VAC® ejectors operate by converting high-pressure vapor, usually steam, into a high-velocity stream, which entrains and accelerates the gases/vapors on the process suction side of the device to create a vacuum.
    • JET-VAC®  ejectors can use process vapors or any compressible gas or a liquid instead of steam as the motivating fluid, and ejector components can be manufactured in corrosion-resistant materials for use in corrosive environments.
    • The design of a JET-VAC® ejector defines its performance. Vacuum can be created by a single device or by multiple-stage devices linked together to achieve very deep, specific vacuum levels.
    • Where steam availability or verticle space is limited, JET-VAC® ejectors can also be incorporated into compact, modular hybrid systems with liquid ring vacuum pumps for low vacuum level installations.

JET-VAC® Ejector products include:
  • Chillers
  • Hybrid Systems (Jets, condenser and liquid ring vacuum pump (LRVP))
  • Desuperheaters
  • Hydro-Jet ejectors
  • Scrubbers
  • Thermo-Syphons
  • Thermo-Compressors
  • Condensers
  • Deaerator