Liquid eductor air pumps
Jacobs Process Analytics Inc. Please select from the options below to see more details about each one. Basically the Venturi vacuum pumporiginally named a Bernoulli vacuum pump, is a simple device that converts pressure liquid eductor air pumps energy to velocity kinetic energy when a fluid liquid or gas is forced through a restriction in an enclosed line, which creates a partial vacuum in the process.
It uses fluid mechanics to obtain work from energy stored in the motive fluid. Because the reduced pressure at the restriction creates a partial vacuum, this device can be used, among other applications, to extract samples from pipes, vent stacks, or ambient air or even to mix samples.
This effect was first described in by the Swiss scientist Daniel Bernoulli in his publication Hydrodynamica 1. A Venturi vacuum pump is based on the principle of the Conservation of Energy which states that, in a steady flow, the sum of all liquid eductor air pumps of mechanical energy in a fluid along a line is the same at all points. That is, the sum of the kinetic energy reflected in the form of velocity and potential energy liquid eductor air pumps must remain constant.
When a restriction is introduced in a line the velocity through that restriction must be greater than the velocity in the larger line. This only makes sense since the same mass of fluid is flowing through a smaller cross sectional area. Therefore, when an increase in the speed of the fluid occurs through the restricted section see figure 1 below there is a proportionate decrease in pressure in order to maintain the same total mechanical energy.
The reverse occurs when the fluid expands into the downstream section. By modifying the geometry of the flowing tube to include a precision machined liquid eductor air pumps, fluid discharge and mixing chamber, a high velocity jet produces a vacuum which can pull in another fluid through a liquid eductor air pumps or suction port. Compressed air flows through the nozzle which causes a Venturi effect. As the air expands and flows into the exhaust tube, the pressure drops below atmospheric pressure.
This causes entrainment of the surrounding air or sample which is mixed with the motive fluid and subsequently discharged downstream. This device is an efficient and inexpensive method to create a vacuum for sampling, mixing, vacuum generation and aspirating. Jacobs Process Analytics makes a line of mini-eductors or mini-aspirators to suit your specific application. There are innumerable applications for this simple technology, from liquid eductor air pumps sampling to gas cooking stoves to large scale dredging operations.
The small mini eductors or mini aspirators that Jacobs Process Analytics offers are routinely used for:. A Venturi pump or eductor is a simple device that has many advantages over a mechanical pump. Call us at Which Eductor Do I Use? Retrieved How does a Venturi vacuum pump work? How do we use the Bernoulli principal to make a sample pump? Where are Venturi eductors used? The small mini eductors or mini aspirators that Jacobs Process Analytics offers are routinely used for: In process analytics for sampling process gases or aspirating stack gases for continuous analysis or for discrete sampling for lab analysis.
The mini-eductor can be used to mix samples in a specific controlled ratio. Any pressurized gas air, nitrogen, argon, natural gas, … can be used as the motive force that creates the vacuum flow.
Our standard off-the-shelf eductors meet the majority of applications. However, we also make customized eductors liquid eductor air pumps suit your specific flow requirements. Create a vacuum for evacuating vessels or lines. Remove noxious vapors from a chemical process or vessel. Why use a Venturi eductor instead of a mechanical pump? The liquid eductor air pumps is an inexpensive device to purchase and install. Compare this to the cost of a mechanical pump, especially if it must be explosion proof or made of an exotic material.
An eductor is a fraction of the cost. Installation requires only an air line and a regulator. Mechanical pumps necessitate installation of conduit, wiring and dedicated circuitry. Mechanical pumps also occupy much more space, which can be a serious consideration for sample conditioning system enclosures. The mini-eductor or mini-aspirator, Venturi pump is easily integrated into any sample system. No additional fittings are required. The Venturi vacuum pump or mini-eductor is an intrinsically safe device.
Eductors or aspirators are virtually maintenance-free. Installation of a mechanical pump automatically reduces the reliability of any system.
Moving parts wear, reducing efficiency and capability, and must be serviced periodically. Compatibility Materials of construction The standard materials of construction for liquid eductor air pumps eductors are SS and Teflon.
See our teflon eductor. Several other metals are also offered hastalloy, titanium, L, monel, … depending on process make-up and conditions. For certain low flow requirements ruby or sapphire is utilized in our educator orifices.
See our tee-type eductors. Many liquid eductor air pumps fittings are also available including a combination of compression fittings and NPT threadings, e. Sub-assemblies We also make sub-assemblies that incorporate the mini-eductor. Small panels can be fabricated to your specifications. Contact us with your requirements. Get a Quote Contact Us. Jacobs Process Analytics, Inc.