Thermocompressor Type 684 & 686 Liquid Jet Exhausters
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| APPLICATION |
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Liquid jet exhausters are used in various pumping
and gas handling applications. A high pressure motive liquid
such as water or other liquid is used to entrain gas under
vacuum. Liquid jet exhausters can be used in any pumping application
where a high pressure motive liquid is available. The unique
spray nozzle design allows the exhauster to overcome substantial
discharge backpressures. Liquid jet exhausters have no moving
parts and require little to no routine maintenance. Type 6134
Exhausters are of cast design and are available in 1/2" through
2" sizes. Type 686 Exhausters are fabricated in 2-1/2" and
larger sizes.
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; evacuation of process vessels;
absorption of soluble gases such as HCI; and creating
a vacuum to prime pumps, establish syphons, deaerate
liquids, impregnate, dry, or chill materials, and operate
vacuum filters.
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| OPERATION/PERFORMANCE |
| The liquid jet exhauster utilizes a high pressure
motive fluid such as water or other liquid to entrain and pump
gas. The liquid discharges from the motive nozzle into the exhauster
body and venturi tail. A spiral in the motive nozzle creates
a full cone spray pattern which seals the venturi tail. Therefore,
the exhauster is self-priming. The nozzle converts the pressure
energy of the motive liquid into a high velocity spray. As 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 gas velocity energy is converted to an intermediate
discharge pressure. The vacuum created by the exhauster is limited
by the vapor pressure of the motive liquid. A higher vacuum can
be obtained with colder water or other low vapor pressure liquid. |
| OPERATION/PERFORMANCE |
| The liquid jet exhauster utilizes a high pressure
motive fluid such as water or other liquid to entrain and pump
gas. The liquid discharges from the motive nozzle into the exhauster
body and venturi tail. A spiral in the motive nozzle creates
a full cone spray pattern which seals the venturi tail. Therefore,
the exhauster is self-priming. The nozzle converts the pressure
energy of the motive liquid into a high velocity spray. As 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 gas velocity energy is converted to an intermediate
discharge pressure. The vacuum created by the exhauster is limited
by the vapor pressure of the motive liquid. A higher vacuum 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 with a fixed spiral.
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. However, special connections such as butt weld, socket
weld, or sanitary |
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