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- Butterfly_valve abstract "A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe; passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, so a pressure drop is always induced in the flow, regardless of valve position.A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The \"butterfly\" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.There are different kinds of butterfly valves, each adapted for different pressures and different usage. The zero-offset butterfly valve, which uses the flexibility of rubber, has the lowest pressure rating. The high-performance double offset butterfly valve, used in slightly higher-pressure systems, is offset from the centre line of the disc seat and body seal (offset one), and the centre line of the bore (offset two). This creates a cam action during operation to lift the seat out of the seal resulting in less friction than is created in the zero offset design and decreases its tendency to wear. The valve best suited for high-pressure systems is the triple offset butterfly valve. In this valve the disc seat contact axis is offset, which acts to virtually eliminate sliding contact between disc and seat. In the case of triple offset valves the seat is made of metal so that it can be machined such as to achieve a bubble tight shut-off when in contact with the disc.".
- Butterfly_valve thumbnail Yagisawa_power_station_inlet_valve.jpg?width=300.
- Butterfly_valve wikiPageID "912962".
- Butterfly_valve wikiPageLength "5767".
- Butterfly_valve wikiPageOutDegree "22".
- Butterfly_valve wikiPageRevisionID "708266295".
- Butterfly_valve wikiPageWikiLink Actuator.
- Butterfly_valve wikiPageWikiLink Backflow.
- Butterfly_valve wikiPageWikiLink Ball_valve.
- Butterfly_valve wikiPageWikiLink Category:Plumbing_valves.
- Butterfly_valve wikiPageWikiLink Category:Valves.
- Butterfly_valve wikiPageWikiLink Control_valves.
- Butterfly_valve wikiPageWikiLink Disk_(mathematics).
- Butterfly_valve wikiPageWikiLink Flange.
- Butterfly_valve wikiPageWikiLink Fluid_dynamics.
- Butterfly_valve wikiPageWikiLink Gate_valve.
- Butterfly_valve wikiPageWikiLink Globe_valve.
- Butterfly_valve wikiPageWikiLink Metal.
- Butterfly_valve wikiPageWikiLink Natural_rubber.
- Butterfly_valve wikiPageWikiLink Needle_valve.
- Butterfly_valve wikiPageWikiLink O-ring.
- Butterfly_valve wikiPageWikiLink Plastic_pipework.
- Butterfly_valve wikiPageWikiLink Pressure.
- Butterfly_valve wikiPageWikiLink Throttle.
- Butterfly_valve wikiPageWikiLink Valve.
- Butterfly_valve wikiPageWikiLink File:Duplex-valve-The-Alloy-Valve-Stockist.JPG.
- Butterfly_valve wikiPageWikiLink File:Yagisawa_power_station_inlet_valve.jpg.
- Butterfly_valve wikiPageWikiLinkText "Butterfly valve".
- Butterfly_valve wikiPageWikiLinkText "butterfly valve".
- Butterfly_valve wikiPageWikiLinkText "butterfly".
- Butterfly_valve wikiPageWikiLinkText "butterfly-style".
- Butterfly_valve wikiPageWikiLinkText "valves".
- Butterfly_valve wikiPageUsesTemplate Template:Automotive_engine.
- Butterfly_valve wikiPageUsesTemplate Template:Commons_category.
- Butterfly_valve wikiPageUsesTemplate Template:Unreferenced.
- Butterfly_valve subject Category:Plumbing_valves.
- Butterfly_valve subject Category:Valves.
- Butterfly_valve hypernym Valve.
- Butterfly_valve type AnatomicalStructure.
- Butterfly_valve type Hydraulic.
- Butterfly_valve type Technology.
- Butterfly_valve comment "A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required.".
- Butterfly_valve label "Butterfly valve".
- Butterfly_valve sameAs Q332934.
- Butterfly_valve sameAs صمام_فراشة.
- Butterfly_valve sameAs Absperrklappe.
- Butterfly_valve sameAs Válvula_de_mariposa.
- Butterfly_valve sameAs شیر_پروانهای.
- Butterfly_valve sameAs Papillon_(mécanique).
- Butterfly_valve sameAs Pillangószelep.
- Butterfly_valve sameAs Valvola_a_farfalla.
- Butterfly_valve sameAs ബട്ടർഫ്ലൈ_വാൽവ്.
- Butterfly_valve sameAs Vlinderklep.
- Butterfly_valve sameAs Zawór_motylkowy.
- Butterfly_valve sameAs Válvula_borboleta.
- Butterfly_valve sameAs m.03p931.
- Butterfly_valve sameAs Дисковый_затвор.
- Butterfly_valve sameAs Дисковий_затвор.
- Butterfly_valve sameAs Q332934.
- Butterfly_valve wasDerivedFrom Butterfly_valve?oldid=708266295.
- Butterfly_valve depiction Yagisawa_power_station_inlet_valve.jpg.
- Butterfly_valve isPrimaryTopicOf Butterfly_valve.