An eductor nozzle, also known as a tank mixing eductor, jet pump, or venturi pump, is a simple, one-piece device with no moving parts used to mix, agitate, heat, or pump liquids, gases, and solids, typically within a tank. They operate on the Venturi principle to efficiently circulate fluids.
How They Work
Eductor nozzles function by converting the pressure energy of a "motive fluid" (liquid, gas, or steam) into velocity energy.
High-Velocity Jet: Pressurized motive fluid is pumped through a converging nozzle, which increases its velocity significantly.
Low-Pressure Zone: As the fluid exits the nozzle at high speed, it creates a low-pressure zone (a partial vacuum) in a suction chamber.
Entrainment: This vacuum draws in a secondary fluid or material from the surrounding tank environment through a separate inlet port.
Mixing and Discharge: The motive fluid and the entrained fluid mix intimately in a "throat" section and are then discharged into the tank as a high-velocity plume, which creates substantial, guided directional flows and agitation.
This process creates a "multiplying effect" on the fluid flow, circulating three to five times the volume of the pumped (motive) liquid, making them highly efficient for tank mixing.
Key Benefits
No Moving Parts: Their simple, one-piece construction means virtually no maintenance, high reliability, and no parts to wear out or break.
Cost-Effective: They require less pumping capacity to achieve effective mixing than mechanical methods, leading to energy and cost savings.
Safe for Hazardous Areas: They can be made from a variety of corrosion-resistant materials (e.g., stainless steel, polypropylene) and can be used in potentially explosive environments where electric pumps would require expensive explosion-proofing.
Versatility: They can handle a wide range of substances, including corrosive liquids, slurries, and solids, that might damage traditional pumps.
