Type 664 and 666 Liquid Jet Exhausters
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Application: |
EST Type 664 and Type 666 Liquid Jet Exhausters
are identical to the Type 464 and Type 466 Liquid Jet Eductors
and offer a slightly more economical alternative to the Type
684 / 686 Liquid Jet Exhausters. At atmospheric suction and discharge
pressure Type 664 / 666 Exhausters handle higher gas rates than
Type 684 / 686 Exhausters. However, under most other vacuum or
elevated discharge pressure conditions, the Type 684 / 686 Exhausters
offer significantly higher gas handling capacities. Type 664
/ 666 Exhausters are used in various pumping and gas handling
applications and utilize a high pressure motive fluid such as
water or other liquid to entrain gas under vacuum. As with other
ejector devices there are no moving parts and little or no routine
maintenance is required.
The chemical, pharmaceutical, petrochemical, pulp and paper,
textile, food, marine, water and wastewater treatment, power,
and many other industries have successfully utilized liquid
jet exhausters. Some typical applications include exhausting
air and fumes from process vessels; absorption of soluble gases
such as HCI; and creating a vacuum to prime pumps, establish
syphons, deaerate liquids, dry or chill materials, and operate
vacuum filters.
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OPERATION/PERFORMANCE: |
Type 664 / 666 Liquid Jet Exhausters utilize a
high pressure motive fluid such as water or other liquid to entrain
and pump gas. The motive liquid enters the suction chamber of
the exhauster through a motive nozzle. The nozzle is not fitted
with a spiral as in Type 684 / 686 Exhausters, and the liquid
jet does not open to seal the venturi throat. Therefore, the
unit is not self-priming. A small discharge backpressure is required
to seal the throat. The nozzle _ converts the pressure energy
of the motive liquid into a high velocity jet. the high velocity
motive liquid mixes with the suction gas, momentum present in the
motive liquid is transferred to the suction gas, creating a vacuum.
The combined stream then enters the venturi tail where the velocity
energy is converted to an intermediate discharge pressure. The
vacuum created by the exhauster is limited by the vapor pressure
of the motive fluid. Higher vacuums can be obtained with colder
water or other low vapor pressure liquid. |
CONSTRUCTION: |
The liquid jet exhauster consists of a one piece
body and venturi tail and a motive nozzle. The exhauster is available
in almost any construction material including steel, stainless
steel, Monel, Hastelloy, titanium, PVC, CPVC, Kynar, and Teflon.
Connections are typically threaded or flanged, but special connections
such as butt weld, socket weld, or sanitary connections can be
supplied. |
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