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Some pumps have a gauge that shows the pressure of air that is forced into the tire. Once the tire is at the correct pressure, the pump valve can be removed from the tire, and the cap can be replaced on the tire valve. There are two main types of tire valves to which the bicycle tire pump attaches. These are the Presta valve and the Schrader ...
Presta valves use air pressure to hold the valve closed, then use a small nut to ensure the valve stays sealed in use. Loosening the nut takes time, which is a disadvantage for racing. Leaving the nut loose still allows the valve to seal, but may make it easier to have accidental (or malicious) deflation.
The Dunlop valve, (also called a Woods valve, an English valve or a Blitz valve [1]) is a type of pneumatic valve stem in use—mostly on inner tubes of bicycles—in many countries, including Japan, [2] Korea, India, Pakistan, Sri Lanka, most European countries, and a number of developing countries.
Presta may refer to: Apco Presta, an Israeli paraglider design; Presta valve, a bicycle tire valve style This page was last edited on 4 ...
Elastomeric pumps, also called balloon pumps or ball pumps, are usually used in the medical field to administer liquid drugs such as local anesthetics, analgesics, cytostatics or antibiotics (depending on the therapy). The required pressure for administering the drug comes from the elastomeric layer that is molded inside the pump.
A practical difference between dynamic and positive-displacement pumps is how they operate under closed valve conditions. Positive-displacement pumps physically displace fluid, so closing a valve downstream of a positive-displacement pump produces a continual pressure build up that can cause mechanical failure of pipeline or pump.
The balls swing out as speed increases, which closes the valve, until a balance is achieved between demand and the proportional gain of the linkage and valve. A centrifugal governor is a specific type of governor with a feedback system that controls the speed of an engine by regulating the flow of fuel or working fluid , so as to maintain a ...
US 2837111, Mueller, Paul G., "Ball cock valve mechanism", published 6 January 1955, issued 3 June 1958 ; hysterisis issue. "Such flush tank valves as now commonly used are closed against the pressure of water from a source of supply which pressure opposes the movement of the float under rising water level in the tank.
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