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 Reed Valve shopping experience:

1. Compare - without doubt the biggest advantage that the Reed Valve offers shoppers today is the ability to compare thousands of Reed Valve 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 Reed Valve? Wrong! If the Reed Valve 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 Reed Valve then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Reed Valve? 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 Reed Valve 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 Reed Valve 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 Reed Valve 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 Reed Valve site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Reed Valve, 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 Reed Valve, 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.

reed valve blades made from carbon fibre.Reed valves restrict flow of gases to a single direction and consist of thin flexible metal or fiberglass strips fixed on one end that open and close upon changing pressures across opposite sides of the valve. They operate in a similar manner to heart valves.

Applications Two-stroke engines Reed valves are commonly used in two-stroke engines to control the fuel-air mixture that is admitted to the engine crankcase. As the piston rises in the cylinder the resulting vacuum opens the valve and admits the fuel-air mixture. As the piston descends, it raises the crankcase pressure causing the valve to close to retain the mixture and pressurize it for its eventual transfer through to the combustion chamber.Motorcycle Mechanics Institute,The Complete Guide to Motorcycle Mechanics, 1984, p. 79-80, Prentice-Hall, Inc., ISBN 0-13-160549-6

Given the fact that they operate via air pressure alone, reed valves are not as precise as rotary valves since physical inertia causes them to open later than the optimum time. Manufacturers have attempted to address this in part by creating multi-stage reeds with smaller, more responsive reeds within larger ones that provide more volume later in the cycle.

The repeated flexing of the valve material eventually causes metal versions to fatigue and fail to seat properly while fiberglass ones will merely snap off and be digested by the engine.

Reed valves are also used in reciprocating compressor designs.

Pulse jets Reed valves are also used in valved pulse jet engines, such as the Argus (company) engine in the German V-1 flying bomb. Their function is much the same as in a piston engine. They are pulled open by a partial vacuum created by an overexpansion of combustion gasses. The open valves allow a charge of fuel and air into the engine, which explodes, increasing the internal pressure and closing the valves. The cycle then repeats.

See also

• Check valve

References

reed valve blades made from carbon fibre.Reed valves restrict flow of gases to a single direction and consist of thin flexible metal or fiberglass strips fixed on one end that open and close upon changing pressures across opposite sides of the valve. They operate in a similar manner to heart valves.

Applications Two-stroke engines Reed valves are commonly used in two-stroke engines to control the fuel-air mixture that is admitted to the engine crankcase. As the piston rises in the cylinder the resulting vacuum opens the valve and admits the fuel-air mixture. As the piston descends, it raises the crankcase pressure causing the valve to close to retain the mixture and pressurize it for its eventual transfer through to the combustion chamber.Motorcycle Mechanics Institute,The Complete Guide to Motorcycle Mechanics, 1984, p. 79-80, Prentice-Hall, Inc., ISBN 0-13-160549-6

Given the fact that they operate via air pressure alone, reed valves are not as precise as rotary valves since physical inertia causes them to open later than the optimum time. Manufacturers have attempted to address this in part by creating multi-stage reeds with smaller, more responsive reeds within larger ones that provide more volume later in the cycle.

The repeated flexing of the valve material eventually causes metal versions to fatigue and fail to seat properly while fiberglass ones will merely snap off and be digested by the engine.

Reed valves are also used in reciprocating compressor designs.

Pulse jets Reed valves are also used in valved pulse jet engines, such as the Argus (company) engine in the German V-1 flying bomb. Their function is much the same as in a piston engine. They are pulled open by a partial vacuum created by an overexpansion of combustion gasses. The open valves allow a charge of fuel and air into the engine, which explodes, increasing the internal pressure and closing the valves. The cycle then repeats.

See also

• Check valve

References

Reed valve - Wikipedia, the free encyclopedia
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