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Air ejectors .pdf

Original filename: Air ejectors.pdf
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Air Ejector
An air ejector is a device which uses the motion of moving fluid to transport
another fluid. It is has a wide range of application in steam ejector in boiler
condenser, fresh water generator and in priming the centrifugal pump.
It works on the principle of convergent /divergent nozzle as it provides the
venturi effect at the point of diffusion as the tube gets narrows at the throat the
velocity of the fluid increases and because of the venturi affect it pressure
decreases, vacuum will occur in the diffuser throat where the suction line will
be provided.

An air ejector which uses the high pressure motive fluid such as air or steam to
flow through the convergent nozzle the function of the convergent nozzle is to
convert the pressure energy of the motive fluid into the velocity energy.
.As the pressure energy before entering the convergent nozzle is greater and the
velocity is less for the fluid. At the point of discharge the pressure energy is
converted into the velocity so the velocity will be greater and the pressure will
be less during the discharge.

Divergent nozzle the opposite effect takes place velocity energy is convert into
pressure energy, at the point of diffusion there is a low pressure or vacuum is
created which is used to suck the other fluid for the motion.
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.

Crystal TCS is a niche technology based engineering firm working in the field
of Ejector based Vacuum systems, Corrosion resistant Equipment and Hydrogen
Generation Systems. Understanding the needs of the customer along with
Technology and Manufacturing excellence are our prime assets when it comes
to satisfying the diverse demands of the industry.
For more information please contact us or call on +912532501600 /
Visit us :- http://www.crystaltcs.com/vacuum-systems.php

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