Venturi Pump

Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Venturi Pump shopping experience:

1. Compare - without doubt the biggest advantage that the Venturi Pump offers shoppers today is the ability to compare thousands of Venturi Pump at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Venturi Pump? Wrong! If the Venturi Pump is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Venturi Pump then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Venturi Pump? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Venturi Pump and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Venturi Pump wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Venturi Pump then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Venturi Pump site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Venturi Pump, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Venturi Pump, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

{{Infobox laboratory equipment| name = Aspirator| image = Aspirator.jpg| caption =A copper aspirator; the water inlet and outlet are at the top and bottom, respectively; the air inlet is on the side| acronym =| other_name =Injector
Ejector
Filter pump]
Vacuum pump-->An aspirator, also called an ejector or filter pump, is a device that produces vacuumby means of the Venturi effect. In an aspirator,fluid (liquid or gaseous) flows through a tube which then narrows. When the tubenarrows, the fluid's speed increases, and because of the Venturi effect, itspressure decreases. Vacuum is taken from this point.

Operation The cheap and simplewater aspirator is the most common type of aspirator. It is used inchemistry and biology laboratories and consistsof a tee fitting which is attached to a faucet and has a hose barb at oneside. The flow of water passes through the straight portion of the tee, which has a restriction at the intersection, where the hose barb is attached. The vacuum hoseshould be connected to this barb.

If a liquid is used as the working fluid, thestrength of the vacuum produced is limited by the vapor pressure of theliquid (for water, 24 mmHg at 25 degrees Celsius.) If a gas is used,however, this restriction does not exist. The industrial steam ejector (also calledthe steam jet ejector, steam aspirator, or steam jet aspirator)uses steam as a working fluid.In order to avoid using too much steam, a single steam ejector stage is generallynot used to generate vacuum below approximately 75 mmHg.High Vacuum Pumping Equipment, B. D. Power, New York: Reinhold Publishing Corporation, 1966, chapter 4. To generate higher vacuum, multiple stages are used; in a two-stagesteam ejector, for example, the second stage provides vacuum for the waste steam outputby the first stage. Condensers may be used between stages to reduce the load on thelater stages. Steam ejectors with two, three, four, five and six stages may beused to produce vacuums down to 20 mmHg, 2.5 mmHg, 0.3 mmHg, 0.03 mmHg,and 0.003 mmHg, respectively.

The air ejector or venturi pump is similar to the steam ejector but useshigh-pressure air as the working fluid. Multistage air ejectors can be used, but since air cannot easily be condensed at room temperature, an air ejector is usually limited to two or three stages. Air Ejectors Cheaper Than Steam

==Medical aspirators==

Medical aspirators are small suction machines used to remove mucus and other bodily fluids from a patient. They are often designed to be portable for use in ambulances and nursing homes, and can run on AC/DC or battery power. Major manufacturers include Allied Healthcare (under the Gomco brand) and Impact.

Insect Aspirator An insect aspirator, often called a pooter is a device for collecting small insects or crustaceans using light suction. A motorized device is occasionally used, but normally the suction produced is through the lungs.

References

See also

Ejector
Steam injector
Diffusion pump
Vacuum pump
Steam ejector

Ejector
Steam injector
Diffusion pump
Vacuum pump
Steam ejector

Aspirator - Wikipedia, the free encyclopedia
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Venturi tube definition of Venturi tube in the Free Online ...
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Venturi effect definition of Venturi effect in the Free Online ...
venturi tube. Short pipe with a constricted inner surface, used to measure fluid flows and as a pump. The effects of constricted channels on fluid flow were first investigated by ...

All Venturi Jet Pumps, desuperheaters, ejectors
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Whats New. Friday, August 15th, 2008 Talley Medical’s Negative Pressure Wound ... study on a patient in the community [PDF – 260KB] Avoiding amputation using the Venturi™ pump ...