Water jet eductors also known as jet pumps, utilize the kinetic energy of one liquid to cause the flow of another. Eductors operate on the basic principles of flow dynamics. This involves taking a high pressure motive stream and accelerating it through a tapered nozzle to increase the velocity of the fluid (gas or liquid) that is put through the nozzle. This fluid is then carried on through a secondary chamber where the friction between the molecules of it and a secondary fluid (generally referred to as the suction fluid) causes this fluid to be pumped. These fluids are intimately mixed together and discharged from the eductor.
There are three connections common to all venturi eductors.
- Performance Table
- Motive Connection
- Suction Connection
- Discharge Connection
|Description||Model SL||Model ML||Model HL||Model SG||Model HG|
|Motive Pressure (PSIG)||15-250||15-250||15-250||30-150||20-150|
|Pressure Recovery %||10-15||30-35||40-50||15-20||30-35|
|Maximum Suction Lift||-27ft.||-27ft.||-27ft.||-20ft.||-20ft.|
|Minimum Required NPSH||3ft.||3ft.||3ft.||13ft.||13ft.|
Draining flooded areas, de-watering sand and coal barges, continuous blending, acidifying, causticizing of oils, pumping food products.
The Process of Sizing an Eductor
Sizing an eductor is a relatively straight forward process. The following information will help you begin the process. If you wish to have us size an eductor(s) for your application please use one of the "Request Pricing" forms to contact us.
Step 2 Divide the desired time to evacuate the volume by the number ofFt3 to be evacuated.
Desired evacuation Time/Ft3 to be Evacuated = Desired Time per Ft3
Step 3 Locate the value equal to or less than the available flowing pressure for your system in the Motive Pressure (Pm) column. If your available system motive pressure is between the listed pressures, you may interpolate between them. Choosing a lower pressure will yield a more conservative estimate. read more ...
Liquid pumping liquids performance tables.
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