How does a Jet Pump Work?


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A jet pump can control a variety of drive liquids, including gases, steam or liquids. They are usually inserted vertically into the processing container but can also be installed horizontally. Multiple inlets are used to suck in the fluid flow, and the pressure is used to increase through the inlet. The combination of suction pressure and fluid or gas velocity drains fluid from a well, reservoir or pit through a pump to drain.

The operation of the jet pump is based on the Bernoulli theorem. Measurements of pressure and velocity in the nozzle, diffuser or suction chamber and the specific gravity of the liquid dispensed can determine the height and/or speed of the discharge. Net positive suction head (NPSH) is the ratio of the distance from the predetermined centerline of the jet pump to the depth of the storage area, the specific gravity of the liquid and the pressure at the specified temperature.

Many jet pumps are automatic, and their design allows them to create and maintain sufficient vacuum without outside assistance to draw fluid. When selecting a jet pump, the type and condition of the fluid affect the flow rate. Ring nozzles can be used for more stable environments in mineral applications or the removal of sand or mud. In some drilling or well applications, when the external pressure and internal pressure exceed the material and pressure characteristics of the jet pump, the pump throat can be damaged, resulting in a greatly reduced flow. Jet pump chamber materials can include polypropylene (PP), polyvinyl chloride (PVC), acrylic, polytetrafluoroethylene (PTFE), steel, stainless steel, and other materials such as glass. Stainless steel bodies and other accessories, including impellers and suction filters, are commonly used with uniform corrosive or abrasive materials.

Materials for Jet Pump

The jet pump body material includes plastic, alloy steel and cast iron.

 Plastics such as polypropylene (PP), polyvinyl chloride (PVC), acrylic and polytetrafluoroethylene (PTFE) are relatively inexpensive and resistant to corrosion and various chemicals.

Steel alloys, including stainless steel, are stronger and more abrasion resistant than plastics and offer excellent corrosion and chemical resistance.

Cast iron has high strength and abrasion resistance.

Composition of Jet Pump

 A new type of jet pump is being developed, which is driven by liquid cavitation (insufficient inlet) or by the production of cavitation (excessive inlet from the nozzle/compound mounted. Throat). This is a completely new concept, and it takes time to become a commercial product. Although it is claimed that the bomb was made without a hole, it could not be scientifically tested in a laboratory area, and the performance of the pump has been proven.

The jet pump consists of three parts: a centrifugal pump, an outlet chamber and a descent valve.

1) Centrifugal pump

The force generated by the centrifugal pump causes the actuator fluid to escape into the ejector, generally by means of a propeller-driven by an electric motor.

2) Jet Ejection

The outlet components of the jet (nozzles, venturi and various connections) are usually disconnected from the pump before installation. The outlet components are carefully designed to suit the flow rate of a particular pump. During installation, it is important to read the ejector seal instructions and properly adjust the seal according to the specific power of the pump.

3) Foot valve

The foot valve is the part that is connected to the well or tank. It receives the fluid that enters the system, feeds the pump, filters the waste and sediments, and keeps the pump running to prevent backflow.

Application of Jet Pumps

 Jet pumps are usually installed vertically in the process environment but can also be installed horizontally. They are commonly used in applications where the pumped material helps produce the energy needed to move around the pump. For example, in marine applications, jet pumps are used to transport seawater. In domestic use, they are used to transfer wastewater into wastewater. Afloat level sensor and switch are used to start the pump.

 Jet Pump Types

There are two different jet pumps: deep wells and shallow wells. The type of jet pump most used in your program depends on the depth of your well.

1) Shallow jet pumps

These are used to transport water from wells to a depth of 25 feet.

2) Deep-well jet pumps

These are usually used at depths of approximately 200 feet. Compared to shallow well pumps, deep well pumps can deliver more water faster and farther. Note that height affects the specific depth to which the water pump can pump.

Deep well pumps can also be called replaceable jet pumps. This means that the pump can be used in shallow or deep wells. In the shallow well settings, an ejector kit (or jet kit) is included or connected to the pump. For deep wells, the kit is placed in the well. The ejector kit helps drain water from the bottom of the well.

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