Jet Pumps

Jet Pump MOTIVE Connection: This connection is where the power for the Jet Pump is generated, by increasing the velocity of the motive fluid. The eductor nozzle in this section takes advantage of the physical properties of the motive fluid. Jet Pumps with liquid motives use a converging nozzle as liquids are not generally compressible. Jet Pumps with gas motives utilize converging-diverging nozzles to achieve maximum benefit from the compressibility of the gas. All of our Jet Pump nozzles have smooth flow paths. Flow paths with sudden steps or roughness on these high velocity surfaces cause jet pumps to operate less efficiently.

SUCTION Connection: This connection of the Jet Pump is where the pumping action of the eductor takes place. The motive fluid passes through the suction chamber, entraining the suction fluid as it passes. The friction between the fluids causes the chamber to be evacuated. This allows pressure in the suction vessel to push additional fluid into the suction connection of the jet pump. The high velocity of the motive stream in this section of the eductor directs the combined fluids toward the outlet section of the Jet Pump.

Discharge Connection: As the motive fluid entrains the suction fluid, part of the kinetic energy of the motive fluid is imparted to the suction fluid. This allows the resulting mixture to discharge at an intermediate pressure. The percentage of the motive pressure that can be recovered is dependent upon the ratio of motive flow to suction flow and the amount of suction pressure pulled on the suction port. The mixture then passes through the diverging taper that converts the kinetic energy back to pressure. The combined fluid then leaves the outlet.

• 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.

To determine the correct eductor for a specific application, follow the steps in this section, using the performance tables provided to achieve your desired results. (NOTE: All JRG/JT tables use the 1-1/2 inch unit as the standard, and eductors are sized using a Sizing Factor (S.E.) based on this standard unit.)  read more ....

To determine the correct eductor for a specific application, follow the steps in this section, using the performance tables provided to achieve your desired results. (NOTE: All JRG/JT tables use the 1-1/2 inch unit as the standard, and eductors are sized using a Sizing Factor (S.E.) based on this standard unit.)  read more ....

Net Positive Suction Head (NPSH) is one of the most used terms for pumps (including eductors) and also one of the least understood. Simply stated, NPSH is a method of evaluating a set of suction conditions for a pump. This formula takes into account variables for the particular liquid being pumped and the conditions under which it is being pumped. It corrects them to a set of standard conditions.  read more ....

To determine the correct eductor for a specifiC application, follow the steps in this section, using the performance tables provided to achieve your desired results. (NOTE: All JRG/JT tables use the 1-1/2 inch unit as the standard, and eductors are sized using a Sizing Factor (S.F.) based on this standard unit.)  read more ....