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A valve is a device that regulates the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. Valves are also found in the human body. For example, there are several heart valves which control the flow of blood in the chambers of the heart and maintain the correct pumping action. Valves are used in a variety of contexts, including industrial, military, commercial, residential, and transportation. The industries in which the majority of valves are used are oil and gas, power generation, mining, water reticulation, sewerage and chemical manufacturing. Plumbing valves, such as taps for hot and cold tap water are the most noticeable types of valves. Other valves encountered on a daily basis include gas control valves on cookers, small valves fitted to washing machines and dishwashers, and safety devices fitted to hot water systems. Valves may be operated manually, either by a hand wheel, lever or pedal. Valves may also be automatic, driven by changes in pressure, temperature, or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers. More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements. Valves are also found in the Otto cycle (internal combustion) engines driven by a camshaft, tappets or push rods where they play a major role in engine cycle control. From Wikipedia under the
GNU Free Documentation License How do you remember the valves to play for the flats and sharps on the french horn? Q. I play french horn in f not b flat. Ho do i remember the valves to use? Asked by Claire M - Sat Dec 27 21:17:34 2008 - - 1 Answers - 2 Comments A. By running the scales for an hour or two every day. Yeah! they are boring but the rote of doing this helps to set the valve action in your brain. The more you run the scales the better fixed in your mind the actions for each note becomes. I get tired of hearing the scales my granddaughter runs on her Clarinet and the scales my grandson runs on his trumpet. But I do know that is the only way to get really good at playing an instrument of any sort. Answered by Miz Lamb - Sat Dec 27 21:53:57 2008 What is the best possible treatment for blockage in heart valves? Q. My father is facing problem in heart valve blockage.His two valves are blocked .(one is blocked 91% and another 75%) He is having a heavy pain in his left arm and leg. What is the best treatment with low medicines as he hate to use more. Asked by praveen s - Tue May 22 05:25:57 2007 - - 5 Answers - 0 Comments A. His heart valves are not blocked, his coronary arteries, the blood vessels that deliver blood to the heart muscle itself are blocked...I would ask his heart specialist for recommendations for treatment. No medicine or dietary changes will make these blockages go away, only possibly prevent worsening and help his heart function despite this problem. Answered by mago - Tue May 22 10:23:43 2007 There are hot/cold water valves in the wall but no drainer hole for my washer in my new house. What to do?
Q. I just moved into a house and there is nowhere to place the bended drainage pipe that runs from my washer. There is a small white box that has the 2 water valves but no hole to put the drainage tube into. What should I do?? Oh, and i bought the house, I am not renting. Asked by Chris K - Sun Mar 22 16:12:23 2009 - - 9 Answers - 0 Comments A. Does it look like a new installation? Maybe it wasn't finished. Is there a sink next to the hook-ups? You can run the drain there. Is there a spot for a sink nearby? Maybe the sellers took the sink with them. Some of the plastic water hook-ups have a pop-out hole for the drain between the valves. But if it was never hooked up, you'll have to run a line to your main drain. Is there any sort of drainpipe in the laundry room or basement or whatever room the hook-ups are in? Might be just as simple as attaching a washing machine line up to it. Answered by PropReno - Sun Mar 22 16:34:48 2009 From Yahoo Answer Search: "Valves"
 news.google.com Odessa American Standing in the middle of her shop, beneath a glittering chandelier, it's hard to believe there's a service shop repairing fittings, valves and machinery ... news.google.com NJ.com The water department will have to do repairs immediately, he said. One of the uses of the building is to store and repair water valves , Lalor said. news.google.com Firehouse.com One worker who tried shutting down the pipe valves was taken to a hospital with burns around his hands, face and eyes. The evacuation was orderly, but long. ... Eight People Treated After Ammonia Leak at Food Processing Plant fox4kc.com all 4 news articles » From Google News Search: "Valves"  exophase.com 305px x 530px | 52.70kB [source page] Posted by x3sphere at July 31 2009 8 11 pm Retailers often get flak from publishers for capitalizing on used game sales an argument that does have its merits depending on what side of the fence you re looking from Valve believes  members.casema.nl 429px x 640px | 62.00kB [source page] Winter maintenance 2004 2005 Now it s cold and wet outside it s time to do some work on your car The engine needed new oil and a filters and the valves needed some small adjustment New gaskets were homebrew Because i didn t now it s condition i fitted a new master brake cilinder The old one was bored out in a brass sleeve was From Yahoo Image Search: "Valves"  egpet.net mkhurram79 ue, 24 Nov 2009 15:50:27 GM Industries which use pumps, seals and pipes will almost certainly also use . valves. in their systems. Someone in each industry needs to be able to design, purchase or maintain the right . valve. for the job in hand, and that can amount to a ...  doityourself.com unknown hu, 26 Nov 2009 14:00:07 GM One person pushes upon the brake pedal while the other tightens the exposed, braking . valves. . Braking system of used cars often develop bleeding . valves. . These loose . valves. act as entry points for air bubbles. Bleeding . valves. can be ...  powerservices.lakho.com admin Mon, 09 Nov 2009 02:49:31 GM Flowserve Durco extended bonnet cartridge plug . valves. and Flowserve McCanna top-entry cartridge ball . valves. passed the stringent seismic testing. From Google Blog Search: "Valves" |
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