
	Where results make sense

Topic: Water hammer

Related Topics

Hydraulic ram

In the News (Tue 14 Feb 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	Water-Hammer.com - Water Hammer, Pipe Shock, Fast Surge Decelaration
		Water hammer is a sudden increase in the pressure of a liquid due to an instantaneous conversion of momentum to pressure.
		Water hammer is caused by a very rapidly moving pressure wave in a closed conduit, usually resulting from a sudden stoppage or change in the mass velocity.
		Water hammer is noise, created by a liquid surge or rapid flow change of the liquid water, or in a steam system due to the sudden collapse, or phase change from steam to water.
	www.water-hammer.com (894 words)

	Water hammer - Wikipedia, the free encyclopedia
		Water hammer (or, more generally, fluid hammer) is a pressure surge or wave caused by the kinetic energy of a fluid in motion when it is forced to stop or change direction suddenly.
		In domestic plumbing this is experienced as a loud bang resembling a hammering noise.
		Water hammer can cause pipelines to break or even explode if the pressure is high enough.
	en.wikipedia.org /wiki/Water_hammer (469 words)

	Water hammer Definition / Water hammer Research (Site not responding. Last check: 2007-11-04)
		Water hammer is a pressure surge or wave caused by the kinetic energyKinetic energy (also named vis viva, or living force) is energy possessed by a body by virtue of its motion.
		Water hammer can cause pipelines to break or even explodeAn explosion is a sudden increase in volume and release of energy in a violent manner, usually with the generation of high temperature and the release of gases.
		Water hammer is the sound of moving water being suddenly stopped cold by the closing of a valve.
	www.elresearch.com /Water_hammer (598 words)

	Water hammer Information
		Water hammer (or, more generally, fluid hammer) is a pressure surge or wave caused by the kinetic energy of a fluid in motion when it is forced to stop or change direction suddenly.
		Moving water in a pipe has kinetic energy proportional to the mass of the water in a given volume times the square of the velocity of the water.
		Water hammer can cause pipelines to break or even explode if the pressure is high enough.
	www.bookrags.com /wiki/Water_hammer (478 words)

	Water Hammer Arresters (Site not responding. Last check: 2007-11-04)
		Water hammer is a water pressure surge that occurs inside water pipes.
		Water hammer occurs in water supply piping when a valve or faucet shuts quickly.
		If your house has air chambers used to control water hammer, it is very difficult, and in many cases impossible, to refill those air chambers with air once they have been waterlogged.
	www.statefarm.com /consumer/vhouse/articles/waterham.htm (661 words)

	Home Improvement: Maintenance: What is Water Hammer?
		The 3 common places that "water hammer" occur are: In water supply pipes, especially to sinks located some distance from the primary plumbing walls, in steam heating pipes and radiators, and in hot water heating system valves.
		One cause of water hammer occurs when water flows in pipes and the pressure changes too quickly, (the sink faucet is suddenly shut off, as an example).
		Water hammer occurs if the supply lines are not secured to the framing or if there is no air-gap, (capped pipe T-ed to the water line but not used as a supply line).
	homegarden.realtor.com /HomeGarden/HomeImprovement/Features/Fall/WaterHammer.asp (690 words)

	What is a Water Hammer
		This humidifier is supplied with a water hammer absorber that you should use in case of noise due to high water pressure.
		Water hammer is an unpleasant noise that sounds as if someone is knocking on your water pipes with a hammer.
		The water hammer intensity depends on different factors (among them, the speed of the water flow and the speed of the valve closing process).
	www.e-humidifiers.com /html/water_hammer.html (604 words)

	Water Hammer In Irrigation Systems
		This occurrence is referred to as "water hammer".
		Velocity (V) in a pipeline depends on the volume flow rate of water through the pipeline (gpm) and the cross-sectional area of flow.
		Water hammer cannot be completely eliminated in an economical design, but, by taking precautions during management and operation, the effects can be minimized.
	edis.ifas.ufl.edu /AE066 (2163 words)

	Home Improvement: Maintenance: What is Water Hammer? (Site not responding. Last check: 2007-11-04)
		The 3 common places that "water hammer" occur are: In water supply pipes, especially to sinks located some distance from the primary plumbing walls, in steam heating pipes and radiators, and in hot water heating system valves.
		One cause of water hammer occurs when water flows in pipes and the pressure changes too quickly, (the sink faucet is suddenly shut off, as an example).
		Water hammer occurs if the supply lines are not secured to the framing or if there is no air-gap, (capped pipe T-ed to the water line but not used as a supply line).
	www.homestore.com /HomeGarden/HomeImprovement/Features/Fall/WaterHammer.asp?poe=homestore (659 words)

	Water Hammer (Site not responding. Last check: 2007-11-04)
		Water hammer can and does occur in any diameter of hose and is created by suddenly stopping the weight or mass of water being moved through the hose.
		water hammer, happens to a certain extent every time a fire fighter closes a ball valve a little too quickly.
		Water hammer and its potential havoc creating capabilities is the main reason relief valves are required at every major apparatus inlet or remote outlet when using large diameter hose systems in the fire service.
	www.wfrfire.com /website/articles/hammer.htm (282 words)

	On Tap Magazine - Tech Brief Winter 2003
		Potential water hammer problems should be considered when pipeline design is evaluated, and a thorough surge analysis should be undertaken, in many instances, to avoid costly malfunctions in a distribution system.
		Water hammer (or hydraulic shock) is the momentary increase in pressure, which occurs in a water system when there is a sudden change of direction or velocity of the water.
		Water hammer will continue to challenge engineers, operators, and managers of water systems because it is associated with systems that cannot be exactly defined due to the size and length of the water distribution system with ondulating profile or the lack of definition of the system components such as valves or pumps.
	www.nesc.wvu.edu /ndwc/articles/OT/WI03/Water_Hammer.html (1491 words)

	What is Water Hammer?
		Water hammer is a very loud banging, knocking or hammering noise in the pipes that occurs when the flow is suddenly turned off.
		You might hear water hammer when the clothes washer stops filling, the sprinkler system shuts off or shifts to another zone, when the dishwasher changes wash cycles, or when a faucet is turned off suddenly.
		If eliminating water hammer from an older house, locating the offending valve or faucet and installing a water arrester at that location is one solution, but the procedure might require breaking into a wall to reach the problem point.
	www.wisegeek.com /what-is-water-hammer.htm (634 words)

	Mini-Rester Water Hammer Arrestor Sioux Chief 660H Buy Online 1-800-456-5267
		Water hammer is definitely a force to be reckoned with in any piping system...
		Water Hammer is a loud banging noise created when a hot or cold water valve is turned off quickly.
		Water hammer is the term used to describe the destructive forces, pounding noises and vibrations that develop in a water system when a closing valve stops the flowing liquid abruptly.
	www.accentshopping.com /store/plumbing/specialty/hammerarrestor/660h.asp (578 words)

	"Water Hammer & Pulsation"
		Surge or water hammer, as it is commonly known is the result of a sudden change in liquid velocity.
		Water hammer usually occurs when a transfer system is quickly started, stopped or is forced to make a rapid change in direction.
		Without question, the primary cause of water hammer in process applications is the quick closing valve, whether manual or automatic.
	www.plastomatic.com /water-hammer.html (636 words)

	Goodwood: Water hammer
		It is frequently recognized by a 'thump' or 'bang', usually throughout the water line (if you have copper pipes, you'll tend to hear the noise throughout the house).
		Water hammer can be caused by a number of things.
		The best solution for this is to increase the size of the water supply thereby slowing down the water (a larger pipe being able to deliver the same amount of water in gallons per minute at a slower speed).
	www.brianhayes.com /goodwood/2004/08/water-hammer.html (269 words)

	OMEGA ENGINEERING - Water Hammer
		The hammer occurs because an entire train of water is being stopped so fast that the end of the train hits up against the front end and sends shock waves through the pipe.
		Since the water flow is restricted inside the pipe, a shock wave of incompressible water travels back down the pipe deflecting everything in its path.
		Liquids possess a large hammer effect because they are incompressible, but gases can also possess a hammer effect large enough to render a sensor useless.
	www.omega.com /techref/waterhammer.html (1260 words)

	Residential Water Hammer, Mini-Rester water hammer arrester
		The use of engineered water hammer arresters is not a new concept in the plumbing industry.
		Water hammer is definitely a force to be reckoned with in any piping system...
		The washing machine solenoid valves are a typical cause of water hammer as are the ones on dishwashers and icemakers.
	www.terrylove.com /mini-rester.htm (432 words)

	Water Hammer and Air in Pipes
		Water hammer can be a big thump that shakes the house, or a series of banging noises starting with a loud bang followed by several "echoes".
		Water hammer can be caused by a pump starting or a valve rapidly opening, however in the vast majority of cases it results when a valve closes.
		The third factor that influences water hammer is the velocity of the water.
	www.irrigationtutorials.com /waterhammer.htm (8664 words)

	Water Hammer - Residential Water Hammer - Builders Websource
		Water hammer is a pressure shock wave induced in plumbing supply systems whenever there is a sudden change in the steady state condition of a non-compressible liquid such as water.
		Water hammer arresters are similar to air chambers, except that the air pocket is fully isolated and sealed from the water, typically with a piston type plunger and lubricated O-ring.
		Water hammer is a potentially serious condition that can result in noisy plumbing and premature failure of a residential or commercial plumbing system.
	www.builderswebsource.com /techbriefs/waterhammer.htm (2954 words)

	Water Hammer Fatality
		Water Hammer and General Steam/Condensate Incidents DOE developed improved employee protection measures based on a review of water hammer and other steam/condensate incidents reported to DOE's Safety Performance Measurement System (SPMS) and Occurrence Reporting and Processing System (ORPS).
		In addition, some systems are compromised further by not being subject to water chemistry control requirements during their early years and by inattention to routine maintenance.
		Appendix N, "Description of Water Hammer and Preventive Measures," Hanford Type A Accident Investigation Report, DOE EH-0335P This Safety Bulletin is one in a series of publications issued by EH to share occupational safety information throughout the DOE complex.
	energyconcepts.tripod.com /energyconcepts/water_hammer_deaths.htm (1298 words)

	Water Hammer
		Water hammer is directly related to the velocity of water traveling through a pipe.
		Velocity of water travel is directly related to the pressure that is pushing the water.
		Water hammer used to be controlled by installing vertical risers near the offending fixtures.
	www.askthebuilder.com /B192_Water_Hammer.shtml (866 words)

	Water Hammer
		The water at the front is brought to an immediate halt, and this requires an impulsive pressure rise.
		If water were incompressible, and the pipe rigid, the whole mass of moving water would have to stop instantaneously, and we would find out what happens when an irresistible force meets an immovable pipe.
		We could find the pressure by considering the dynamics of a thin slice of water, but a much easier way is to equate the kinetic energy of the water when the tap was closed to the strain energy of the water at rest, compressed by the extra pressure.
	www.du.edu /~jcalvert/tech/fluids/waterham.htm (779 words)

	Dictionary of Terms (Site not responding. Last check: 2007-11-04)
		Water hammer is one of the chief causes of noise in steam heating systems a nd also the major cause of damage to thermostats and floats in traps.
		The rapid passage of steam over the surface of the water causes a wave to form as at “B”.
		The rapid condensation of the steam in pockets “A” brings the two slugs of water together with a considerable force, which may be telegraphed through the piping.
	fhaspapp.ittind.com /homeowners/DictionaryOfTermsDetail.asp?ListID=29 (139 words)

	HeatingHelp.com
		Water hammer from bad pipe pitch usually happens when the system first starts.
		This type of water hammer usually happens during the middle of the firing cycle.
		To avoid water hammer, always keep the steam and the condensate as far away from each other as you can.
	www.heatinghelp.com /steam_waterhammerinthesystem.cfm (2135 words)

	[No title]
		Water hammer is usually recognized by the banging or thumping noise that’s heard when valves are shut off.
		Water hammer occurs when the flow of moving water is suddenly stopped by a closing valve.
		Many water hammer applications employ complex or uncommon types of fixtures, and some involve flow pressures or pipe sizes that are outside the typical range.
	www.siouxchief.com /B_WaterHammer_FAQ.cfm (1345 words)

	Find plumbing water hammer at Outfit Your Home - Buy Furnishings, Appliances, Tools and More for Your Home Online
		Water hammer is a nickname for the effects of the kinetic energy of a body of water in motion...
		Water hammer is a pressure shock wave induced in plumbing...
		Water hammer is the sound of moving water being suddenly stopped...
	www.outfityourhome.com /directory/plumbing/plumbing_water_hammer (582 words)

Try your search on: Qwika (all wikis)