Convert Pressure to Velocity without Moving Parts
JET-VAC® Technologies steam jet ejectors operate by passing motive steam, through an expanding nozzle. Vacuum ejectors are used in a variety of applications in the process industries, such as food and beverage, chemical/petrochemical, waste reduction, pharmaceutical, nutraceutical, power and energy, and edible oil industries.
Ejectors will handle large process loads containing both condensable and non-condensable gases as well as small amounts of solids or liquids. Ejectors range from Single Stage to up to Multi-Stage units. The number of ejector stages required is dictated by the level (depth) of vacuum required.
Where steam availability or vertical 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® ejectors operate, by converting high-pressure vapor usually steam, into a high-velocity stream. This conversion 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. JET-VAC® ejector can be manufactured in corrosion- resistant materials, such as impervious graphite, that is impregnated with Phenolic Resin. We also offer materials including cast iron, carbon steel, stainless steel, Alloy 2205, Hastelloy® Titanium, and other materials. Our ejectors have no moving parts, and they are easy to install, operate and maintain.
How Ejectors Work
- Steam is fed at high pressure and relatively low velocity into the motive connection.
- Steam expands through the ejector nozzle and changes into a high-velocity/low-pressure stream.
- When lower than atmospheric pressure, a vacuum is created.
- A low absolute pressure attracts the gases to be pumped from the vacuum vessel.
- Momentum is transferred between fluids, raising the pressure of the fluid being pumped.
- The mixture of fluids then discharges to the discharge line (or the next ejector in multi-stage designs).
