How does a venturi eductor work?
An eductor system uses fluid mechanics to transfer energy from one fluid to another via the Venturi effect, in which flow is restricted to create a partial vacuum. Essentially, high-pressure low-velocity fluid is converted to low-pressure high-velocity fluid to produce the pressure difference required for suction.
What is an eductor and its purpose?
An eductor, often referred to as a liquid jet pump, is a pump that drives fluid (liquid, gas, air) from a specific area through an enclosed circulation. In simple words, it operates like a large-scale vacuum, fueled by driving liquid, operating on a principle known as the “Venturi effect”.
How do you size an eductor?
Use a 1-1/2” eductor with a small nozzle (SN) to handle 2.25 x 12.3 gpm = 27.7 gpm using 2.25 x 11.3 gpm = 25.4 gpm of motive water. An eductor is required to pump 23 gpm of water from a tank 15 feet below and discharge the water 20 feet vertically (equivalent to a back pressure of 8.6 psi).
How does a steam eductor work?
Eductor liquid heaters operate by condensing steam into the liquid that is being heated. The process ensures a complete transfer of the BTUs in the steam to the liquid. The steam gives up its BTUs as it condenses into the liquid. This also dilutes the motive liquid with the condensate.
What is a venturi pump eductor?
What are Fox Liquid Eductors? Fox Liquid Eductors are venturi jet pumps that use liquid to create vacuum to mix, blend, or dilute other liquids, dry solids, or gasses into a liquid stream. They are used to replace or eliminate pumps when simple, ultra-reliable liquid mixing is required.
How vacuum is created in eductor?
The Eductors JET-VAC® Technologies provides operate by converting high-pressure liquid, usually water, into a high-velocity steam or can also use process liquid as the motivating fluid. This then entrains and accelerates the gases/vapors, on the process suction side of the device, to create a vacuum.
What is an eductor nozzle?
Eductor nozzles, also known as jet pumps, venturi pumps or ejectors, are the easiest way to mix, heat or pump different types of liquids, gases and solids either in-line or in-tank in the petrochemical and other industries. Eductor nozzles are also used to: Clear sludge. Prevent sediment. Liquid draining.
Does a venturi increase pressure?
A Venturi is a system for speeding the flow of the fluid, by constricting it in a cone shape tube. In the restriction the fluid must increase its velocity reducing its pressure and producing a partial vacuum. As the fluid leave the constriction, its pressure increase back to the ambient or pipe level.
What is an eductor tube?
Eductor (liquid delivery) tube A tube inside a cylinder or container attached to the cylinder valve which allows liquid product withdrawal from the cylinder.
How do you calculate Venturi flow rate?
Venturi Flow Equation and Calculator
- Preview: Venturi Flow Calculator.
- and.
- Therefore:
- and.
- Qmass = ρ · Q. Where: Q = volumetric flow rate (m3/s, in3/s) Qmass = Mass flowrate (kg/s, lbs/s) A1 = area = Π · r2 (mm2, in2) A2 = area = Π · r2 (mm2, in2) r1 = radius inlet at A1 (mm, in) r2 = radius inlet at A2 (mm, in)
How do you increase Venturi flow?
Venturi Meter or Venturi Tube
- the higher the pressure difference (the lower p2), the higher the flow rate.
- the flow rate can be increased by decreasing the fluid density.
How vacuum is created by an educator?
It is a type of jet pump used to pump out liquid/sediments where the suction head is too low for the normal pump to operate. Based on the venturi effect and Bernoulli principle here primary fluid medium ( water / Same fluid ) is used to create a vacuum to suck in the secondary air, gas or liquid.
What is the difference between ejector and eductor?
The ejectors are used to maintain a system vacuum in the upstream (Example maintaining the vacuum column pressure) whereas eductor’s main objective is to take out the volume of any fluid out of the system by maintaining a system pressure in the upstream.