jet pump

What Is A Jet Pump: Types, Work, And Install

What is a jet pump? A jet pump is a mechanical machine that flows fluids by a driving nozzle that transforms the pressure of the fluid into a high-speed jet. If you want to know more about the jet pump, continue reading, you will learn all about jet pumps like types, pros and cons, and how to install them.

What is a Jet Pump?

A jet pump is a mechanical machine that flows fluids by a driving nozzle that transforms the pressure of the fluid into a high-speed jet. This nozzle’s jet continuously removes fluid from the jet pump’s inlet side. In the mixing tube, the trapped fluid absorbs some part of the energy of the moving fluid. The diffuser of this pump retransforms the fluid velocity into the pressure.

A jet pump works by pulling the water toward the surface instead of pulling it like a submersible pump. It is a self-priming pump with no moving parts. By accelerating the pressure recovery in the diffuser, this pump can quickly jet almost any liquid and drive another liquid.

In jet pumps, two or more inlets use to extract a constant flow of liquid, and pressure is used to produce a suction lift. The medium flows out of the pit, storage tank, or well through the pump and out the outlet point as a result of the combination of the gas or liquid’s velocity and inlet pressure.

Due to some reasons like friction loss, the efficiency of the jet pump is lower than that of a normal centrifugal pump. When processing a gaseous mixed media or in a variety of downhole situations where turbulence is present on the surface, the jet pumps, however, operate with high efficiency.

This kind of pump has one or more diffusers and impellers, as well as an ejector. Over the ground, it is installed, and a pipe in the inlet allows water to be pumped out of the ground.

In areas with high water tables, these types of pumps are well-known. Therefore, these are suitable for a variety of residential uses, including farms, bungalows, oil rigs, and small single-family homes.

It is advised to use a jet pump to draw water from the well if the use of a submersible pump is not advised or is forbidden by the local government.

What are the Advantages and Disadvantages of Jet Pumps?

The jet pump has the following advantages and disadvantages:

Advantages of Jet Pumps

  • The jet pump has no mechanical or moving components that could deteriorate over time.
  • the potential for high productivity.
  • Long service life is a feature.
  • It requires minimal upkeep expenses.
  • It can be altered in accordance with the various productivity levels by adjusting the engine oil injection rate.
  • ability to walk for extended periods of time without assistance.
  • When maintenance is required, these pumps can acquire and exchange materials quickly and effectively.
  • extremely high tolerance for abrasives in manufactured liquids.
  • The fuel fluid is made more resistant to corrosive fluids by the addition of CRA materials or inhibitors.
  • Without endangering the pipe, it can be used in wells with significant deflection angles.
  • The downtime is reduced and it is possible to remove casing, cables, or tubing without a puller thanks to the downhole pump being circulated in and out of the wellbore.
  • It can deal with high GLR.
  • suitable for remote work.
  • Compression fittings and pipe plugs can also be used to attach it to the entire air transport chuck.
  • It can be installed using a cable in sliding sleeves and nipples as well.

Disadvantages of Jet Pumps

  • It is low efficient than other artificial lifts
  • Space limitation problems
  • It has high-pressure surface lines
  • It also consumes high power

How Many Types of Jet Pumps?

The jet pump has three main types that are:

  • Deep well Pump
  • Shallow well Pump
  • Convertible Pump

Deep Well Pump

A deep well jet pump uses to pump water from deep underground wells. An excavation was made to create a deep well, which was created to collect groundwater. These structures are produced by the drilling technique.

A deep well pump is mainly found in rural areas where water is not easily available. From about 22 feet to about 120 feet, these pumps can lift water via suction. To deliver water that meets our needs, deep-well jet pumps employ the same principles as centrifugal pumps and fuel injectors.

Most often, these pumps are used to pump water for domestic purposes. As a deep-well water pump, it also goes by that name.

Advantages and Disadvantages of Deep Well Pump

AdvantagesDisadvantages
It requires low maintenance and a relatively low priceIt needs to be filled with water if the water level drops below the lower valve of the inlet line.
Adapted to draw water from different suction headsHigher suction heads can only be used with submersible pumps.
A deep well jet pump has a low priceSand and other abrasives in wells have the potential to harm the housing and runner.
Easy maintenance
Long service life
Installing it far from the water source is possible.
Advantages and Disadvantages of Deep Well Pump

Shallow Well Pump

These pumps are appropriate for wells or reservoirs with a maximum total pump height of 5.5 meters. The shallow well jet pump uses for purposes where the medium is close to the surface, e.g., residential wells.

An electric motor, an impeller, and a jet assembly make up the three main components of a shallow jet pump. Because there is little labor and material required, shallow well drilling typically has low costs. For wells that are shorter than 25 feet, this pump is needed. Shallow pumps, on the other hand, cannot be submerged. These are instead set in the well casing.

Advantages and Disadvantages of Shallow Well Pump

AdvantagesDisadvantages
This pump can balance the well.With more total lift, the sallow jet pump becomes less effective.
can adjust to wells with varying rates of production.There are issues with these pumps’ priming.
A simple machine that almost never needs maintenance.These exhibit cavitational problems.
A shallow well pump is reasonably priced.
Advantages and Disadvantages of Shallow Well Pump
jet pump

Convertible Well Pump

Water can be drawn from a depth of 70 feet using the movable jet well pump. It is called a “convertible” pump because it can use as a shallow well pump for water sources up to 25 ft deep and a deep well pump for water sources up to 70 ft.

Additionally, it works when the pump is placed above the water source. To pump water out of the well, the convertible jet pump uses two suction pipes.

As the name of the pump suggests, you can turn it into a shallow-bore jet pump by attaching the jet assembly to a suction tube. The water will now only be about 25 feet deep. convertible jet pumps can be used in shallow or deep well applications.

Advantages and Disadvantages of Convertible Well Pump

AdvantagesDisadvantages
Lower price.Cavitation problems.
low maintenance requirementsa little sand damage.
Highly Efficient.Gas blockages do occur on occasion.
These are capable of pumping water from greater depths.
Large capacity.
Advantages and Disadvantages of Convertible Well Pump

How Do Jet Pumps Work?

The Jet Pump is an artificial lifting system that consists of two main parts:

  • Surface pumping device
  • Downhole jet pump

Uneven air pressure is used by the jet water pump to operate. Similar to how liquid is sucked up through a straw, it functions similarly. The pump first fills with water. The pump impeller rotates after coupling and sends air and water bubbles through the system. A continuous area of low pressure is created during this process as air leaks from the emergency shut-off valve, pushing the groundwater upwards naturally.

When liquid enters the jet pump, an appropriately sized nozzle reduces the flow path’s surface area, increasing the liquid’s velocity and producing a venturi effect. The liquid is drawn from the reservoir to the jet pump by the pressure differential produced by the Venturi effect.

Venturi can be placed a certain amount of distance apart from one another. Drive fluid and stored fluid combine, and through the flow path of the expanding area, pressure rises with decreasing velocity. In order to lift the mixed liquid to the surface, there must be enough pressure increase.

How to Install a Jet Pump?

If you want to install your jet pump, follow the below-given steps:

Make a Horizontal Base:

In order to mount the Mono Jet block, prepare a horizontal concrete base and tighten the motor base with the base screws.

Pipe Size:

As stated on the product label, use the specified pipe size.

Filters and Valve Inspection:

Make sure the jet unit (series TDSJ, TSJ, HCSJ) is attached to the borehole at the ends of the suction and return lines. It has a foot valve and a filter. Ensure that the attached filter for the HCSJ series is inserted into the borehole suction tube from the bottom up.

Priming:

You must prime the pump before you turn it on for the first time.

  • On the TDSJ and HCS 80/11 series, air cock is not available. Once the pump is primed, there can be no more water added. Stop adding water and replace the filler cap.
  • When filling or priming the pressure valve, if the water level drops steadily, this indicates a leak and needs to be fixed.

Set the pressure control valve to the maximum delivery rate:

The visual technique is the simplest method for adjusting the control valve for the best delivery rate. Utilize this method to measure the discharge rate by running the pump while adjusting the Round Head Screw (15).

When the water flow to the delivery pipe is at its maximum, continue tightening the Round Head Screw (15). In order to prevent the Round Head Screw (15) from coming undone, lock the Hex Nut (2) now. The pressure valve cap nut (1) must be taken off, tightened, and replaced to prevent tampering in order to open the Round Head Screw (15).

Electrical equipment installation:

  • the single-phase jet Monoblock needs to be grounded.
  • Check to see if the electrical connections are correctly insulated and made if any.
  • Link the cable correctly to the starter clamp so that the connection does not come loose
  • When choosing the wire size, it is important to consider the low-voltage operation.

Power wire joining to non-clog sewage pump:

  • The two wires that protrude from the junction box cover should be connected to the motor’s internal wiring and pre-connection to the capacitor cables.
  • These two wires can only be connected by the phase and neutral conductors.

In this article, we introduce issues about jet pumps, like the definition, pros and cons, types and every type’s advantages and disadvantages, and how to install a jet pump. Do you know more about jet pumps?

FAQ

What is the Difference Between a Turbine and a Jet Pump?

A turbine pump is a centrifugal pump that is essentially installed underwater and connected to an electric motor (installed on the water surface) with the aid of a shaft.

High-efficiency turbo pumps are typically used for big pumping tasks. This pump typically has several stages, with each step essentially being a different pump stacked on top of the lower stage. Each stage represents an engine in the manner of a train pulling with multiple engines. Also attached to its end is a sizable electric motor. A jet pump functions similarly to a turbopump but returns water to the inlet to assist in lifting the water.

Can a Jet Pump Overheat?

  • A jet pump can overheat if it operates continuously in the voltage range between 240 and 170 volts.
  • To prevent motor overload, the pump is equipped with a thermal overload protector (T.O.P.).