About: Expansion valve (steam engine)

Facets (new session)
Description
Metadata
Settings
- Rule:
- Inverse Functional Properties:
- "Same As":

About: Expansion valve (steam engine) Goto Sponge NotDistinct Permalink

An Entity of Type : yago:WikicatEngineValves, within Data Space : dbpedia.org associated with source document(s)
QRcode icon

http://dbpedia.org/describe/?url=http%3A%2F%2Fdbpedia.org%2Fresource%2FExpansion_valve_%28steam_engine%29&graph=http%3A%2F%2Fdbpedia.org&graph=http%3A%2F%2Fdbpedia.org

An expansion valve is a device in steam engine valve gear that improves engine efficiency. It operates by closing off the supply of steam early, before the piston has travelled through its full stroke. This cut-off allows the steam to then expand within the cylinder. This expanding steam is still sufficient to drive the piston, even though its pressure decreases as it expands. As less steam is supplied in the shorter time for which the valve is open, use of the expansion valve reduces the steam consumed and thus the fuel required. The engine (on 1875 figures) may deliver two-thirds of the work, for only one-third of the steam.

Attributes	Values
rdf:type	yago:BodyPart105220461 yago:Part109385911 yago:PhysicalEntity100001930 device yago:Structure105225602 yago:Thing100002452 yago:Valve105395286 yago:WikicatEngineValves
rdfs:label	Expansion valve (steam engine) (en)
rdfs:comment	An expansion valve is a device in steam engine valve gear that improves engine efficiency. It operates by closing off the supply of steam early, before the piston has travelled through its full stroke. This cut-off allows the steam to then expand within the cylinder. This expanding steam is still sufficient to drive the piston, even though its pressure decreases as it expands. As less steam is supplied in the shorter time for which the valve is open, use of the expansion valve reduces the steam consumed and thus the fuel required. The engine (on 1875 figures) may deliver two-thirds of the work, for only one-third of the steam. (en)
foaf:depiction
dcterms:subject	Engine valves Steam engine technology
Wikipage page ID	19451462 (xsd:integer)
Wikipage revision ID	1113808875 (xsd:integer)
Link from a Wikipage to another Wikipage	Cam Boyle's law Richard Trevithick Robey & Co. Compound steam engine Piston valve (steam engine) Mill engine Rolling mill Steam (software) Steam locomotive Superheater McIntosh & Seymour Engine valves Cut-off (steam engine) Steam engine technology Bronze Centrifugal governor Marine steam engine James Watt Stationary engine Snibston Discovery Museum Lap and lead Coleham Pumping Station Eccentric (mechanism) High-speed steam engine Jean-Jacques Meyer Ferranti Midland Railway Paget locomotive Operating temperature Cast iron Samuel Homfray Poppet valve Valve gear Trip valve gear Slide valve Stephenson link valve gear Tredegar Iron Works (Tredegar) Desmodromic Simple expansion steam engine dbr:Ferranti_engine dbr:Cam_valve_gear dbr:Eccentric_valve_gear dbr:Wire-drawing_(steam_engine)
sameAs	Expansion valve (steam engine) Expansion valve (steam engine) Expansion valve (steam engine) Expansion valve (steam engine)
dbp:wikiPageUsesTemplate	dbt:Commons_category dbt:Efn-lr dbt:Notelist-lr dbt:Reflist dbt:Sfnp dbt:Steam_engine_configurations
thumbnail	wiki-commons:Special:FilePath/Cross_compound_engine,_plan_section_(Heat_Engines,_1913).jpg?width=300
has abstract	An expansion valve is a device in steam engine valve gear that improves engine efficiency. It operates by closing off the supply of steam early, before the piston has travelled through its full stroke. This cut-off allows the steam to then expand within the cylinder. This expanding steam is still sufficient to drive the piston, even though its pressure decreases as it expands. As less steam is supplied in the shorter time for which the valve is open, use of the expansion valve reduces the steam consumed and thus the fuel required. The engine (on 1875 figures) may deliver two-thirds of the work, for only one-third of the steam. An expansion valve is a secondary valve within a steam engine. They represent an intermediate step between steam engines with non-expansive working and later valve gears that could provide for expansion by controlling the motion of a single valve. Expansion valves were used for stationary engines and marine engines. They were not used for locomotives, although expansive working was achieved by the use of the later variable expansion valve gears. (en)
gold:hypernym	Device
prov:wasDerivedFrom	wikipedia-en:Expansion_valve_(steam_engine)?oldid=1113808875&ns=0
page length (characters) of wiki page	14698 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Expansion_valve_(steam_engine)
is Link from a Wikipage to another Wikipage of	Samarang-class gunvessel Bolton and Leigh Railway Joule–Thomson effect Cutoff (steam engine) Mastodon (steam locomotive) Steam (software) Steeple compound engine John Gray (locomotive engineer) Air source heat pump Expansion valve Meyer expansion valve
is Wikipage redirect of	Meyer expansion valve
is Wikipage disambiguates of	Expansion valve
is foaf:primaryTopic of	wikipedia-en:Expansion_valve_(steam_engine)

Faceted Search & Find service v1.17_git139 as of Feb 29 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 08.03.3330 as of Mar 19 2024, on Linux (x86_64-generic-linux-glibc212), Single-Server Edition (61 GB total memory, 44 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software