Air jet pumps

A jet engine is a reaction engine discharging a fast-moving jet that generates thrust by jet propulsion . This broad definition includes airbreathing jet engines ( turbojets , turbofans , ramjets , and pulse jets ) and non-airbreathing jet engines (such as rocket engines ). In general, jet engines are combustion engines.

In common parlance, the term jet engine loosely refers to an internal combustion airbreathing jet engine . These typically feature a rotating air compressor powered by a turbine , with the leftover power providing thrust via a propelling nozzle — this process is known as the Brayton thermodynamic cycle . Jet aircraft use such engines for long-distance travel. Early jet aircraft used turbojet engines which were relatively inefficient for subsonic flight. Modern subsonic jet aircraft usually use more complex high-bypass turbofan engines . These engines offer high speed and greater fuel efficiency than piston and propeller aeroengines over long distances.

The thrust of a typical jetliner engine went from 5,000 lbf (22,000 N) ( de Havilland Ghost turbojet ) in the 1950s to 115,000 lbf (510,000 N) ( General Electric GE90 turbofan) in the 1990s, and their reliability went from 40 in-flight shutdowns per 100,000 engine flight hours to less than one in the late 1990s. This, combined with greatly decreased fuel consumption, permitted routine transatlantic flight by twin-engined airliners by the turn of the century, where before a similar journey would have required multiple fuel stops. [1]

Air Jet Ejectors are based on the ejector-venturi principal and operate by passing motive air or gas through an expanding nozzle. The nozzle provides controlled expansion of the motive gas to convert pressure in to velocity which creates a vacuum with in the body chamber to draw in and entrain gases or vapours. The motive gas and suction gas are then completely mixed and then passed through the diffuser or tail, where the gases velocity is converted in to sufficient pressure to meet the predetermined discharge pressure.

Vacuum Ejectors are used in a variety of applications in the process, food, steel and petrochemical industries. Typical duties involve filtration, distillation, absorption, mixing, vacuum packaging, freeze drying, dehysrating and degassing. Ejectors will handle both condensible and none condensible gas loads as well as small amounts of solids or liquids, however accidental entrainment of liquids can cause a momentary interruption in vacuum but this will not cause damage to the ejector.

More recently Air Ejectors have been used for leak testing of under sea pipework, where high levels of vacuum are applied and held on several hundred kilometers of pipe for several days. For these applications several Air Ejectors (either single stage or two stage systems) are used in parallel in reduce the overall duty cycle time.

Air Jet Vacuum Ejectors for creating high levels of vacuum either within vessels or process lines. Multiple stage units are available depending upon the level of ...

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Maximum air flow: 42 CFM (60 Hz), 33 CFM (50 Hz).
Maximum pressure: 39" H 2 O (60 Hz), 30" H 2 O (50 Hz).
Maximum vacuum: 35" H 2 O (60 Hz), 25" H 2 O (50 Hz).