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Type 664 and 666 Liquid Jet Exhausters

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.

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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