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- Gate_valve abstract "A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is desired. The gate faces can form a wedge shape or they can be parallel. Gate valves are primarily used to permit or prevent the flow of liquids, but typical gate valves shouldn't be used for regulating flow, unless they are specifically designed for that purpose. Because of their ability to cut through liquids, gate valves are often used in the petroleum industry. For extremely thick fluids, a specialty valve often known as a knife valve is used to cut through the liquid. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening. This means that flow rate does not change evenly with stem travel. Also, a partially open gate disk tends to vibrate from the fluid flow. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing disk and seat wear and eventual leakage if used to regulate flow. Typical gate valves are designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. Nonrising stem valves may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate travels up or down the stem on the threads without raising or lowering the stem. Nonrising stems are used underground or where vertical space is limited.Bonnets provide leakproof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.Another type of bonnet construction in a gate valve is pressure seal bonnet. This construction is adopted for valves for high pressure service, typically in excess of 2250 psi (15 MPa). The unique feature about the pressure seal bonnet is that the body - bonnet joints seals improves as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint.Gate valves may have flanged ends which are drilled according to pipeline compatible flange dimensional standards. Gate valves are typically constructed from cast iron, ductile iron, cast carbon steel, gun metal, stainless steel, alloy steels, and forged steels.All-metal gate valves are typically used in ultra-high vacuum chambers to isolate regions of the chamber.".
- Gate_valve thumbnail Valve.jpg?width=300.
- Gate_valve wikiPageID "615385".
- Gate_valve wikiPageLength "4863".
- Gate_valve wikiPageOutDegree "25".
- Gate_valve wikiPageRevisionID "655480409".
- Gate_valve wikiPageWikiLink Ball_valve.
- Gate_valve wikiPageWikiLink Butterfly_valve.
- Gate_valve wikiPageWikiLink Cast_iron.
- Gate_valve wikiPageWikiLink Category:Articles_containing_video_clips.
- Gate_valve wikiPageWikiLink Category:Plumbing_valves.
- Gate_valve wikiPageWikiLink Category:Valves.
- Gate_valve wikiPageWikiLink Control_valve.
- Gate_valve wikiPageWikiLink Control_valves.
- Gate_valve wikiPageWikiLink Ductile_iron.
- Gate_valve wikiPageWikiLink Electric.
- Gate_valve wikiPageWikiLink Electricity.
- Gate_valve wikiPageWikiLink Fire_hydrant.
- Gate_valve wikiPageWikiLink Fluid.
- Gate_valve wikiPageWikiLink Friction.
- Gate_valve wikiPageWikiLink Globe_valve.
- Gate_valve wikiPageWikiLink Megapascal.
- Gate_valve wikiPageWikiLink Needle_valve.
- Gate_valve wikiPageWikiLink Nut_(hardware).
- Gate_valve wikiPageWikiLink Pascal_(unit).
- Gate_valve wikiPageWikiLink Petroleum.
- Gate_valve wikiPageWikiLink Piping_and_instrumentation_diagram.
- Gate_valve wikiPageWikiLink Plastic_pipework.
- Gate_valve wikiPageWikiLink Plastic_pressure_pipe_systems.
- Gate_valve wikiPageWikiLink Process_flow_diagram.
- Gate_valve wikiPageWikiLink Screw.
- Gate_valve wikiPageWikiLink Ultra-high_vacuum.
- Gate_valve wikiPageWikiLink Valve.
- Gate_valve wikiPageWikiLink File:Gatevalve.ogg.
- Gate_valve wikiPageWikiLink File:Valve.jpg.
- Gate_valve wikiPageWikiLinkText "Gate valve".
- Gate_valve wikiPageWikiLinkText "cut-off valves".
- Gate_valve wikiPageWikiLinkText "gate valve".
- Gate_valve wikiPageWikiLinkText "gate".
- Gate_valve hasPhotoCollection Gate_valve.
- Gate_valve wikiPageUsesTemplate Template:Commons_category.
- Gate_valve wikiPageUsesTemplate Template:Refimprove.
- Gate_valve wikiPageUsesTemplate Template:Reflist.
- Gate_valve subject Category:Articles_containing_video_clips.
- Gate_valve subject Category:Plumbing_valves.
- Gate_valve subject Category:Valves.
- Gate_valve hypernym Valve.
- Gate_valve type AnatomicalStructure.
- Gate_valve type Article.
- Gate_valve type Article.
- Gate_valve type Hydraulic.
- Gate_valve type Technology.
- Gate_valve comment "A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is desired. The gate faces can form a wedge shape or they can be parallel.".
- Gate_valve label "Gate valve".
- Gate_valve sameAs صمام_بوابة.
- Gate_valve sameAs Vàlvula_de_comporta.
- Gate_valve sameAs Šoupě.
- Gate_valve sameAs Absperrschieber.
- Gate_valve sameAs Válvula_de_compuerta.
- Gate_valve sameAs شیر_دروازهای.
- Gate_valve sameAs Protočni_ventil.
- Gate_valve sameAs Tolózár.
- Gate_valve sameAs Valvola_a_saracinesca.
- Gate_valve sameAs Afsluiter.
- Gate_valve sameAs Válvula_de_gaveta.
- Gate_valve sameAs m.02wvy1.
- Gate_valve sameAs Задвижка.
- Gate_valve sameAs Protočni_ventil.
- Gate_valve sameAs Kilslidventil.
- Gate_valve sameAs Засувка_(гідравліка).
- Gate_valve sameAs Q332944.
- Gate_valve sameAs Q332944.
- Gate_valve wasDerivedFrom Gate_valve?oldid=655480409.
- Gate_valve depiction Valve.jpg.
- Gate_valve isPrimaryTopicOf Gate_valve.