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Valve (other)
A valve is a device that regulates the flow of fluids. Valve may also refer to: Types of valves * Piston valve, a part in many brass instruments, used to control notes. * Poppet valve, a valve consisting of a hole and a tapered plug on the end of a shaft, typically used in instruments, engines, etc. * Heart valve, valves in the heart that maintain the unidirectional flow of blood * Vein valve, valves in veins and other fluid cords in body * Lymphatic valve, valves in lymphatic vessels * Vacuum tube, also called "thermionic valve", an electronic component ** Mercury-arc valve, a type of electrical rectifier tube Biology * Valve (mollusc), the shell of a mollusc * Valve (diatoms), the siliceous unit that makes up one half of a diatom cell * Valve (botany), part produced by the splitting of a capsule or pod when ripe * Valve, a paired clasping process on the genitalia of male moths Companies * Valve Corporation (also known as Valve Software or Valve), a video game developer and d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve
A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin ''valva'', the moving part of a door, in turn from ''volvere'', to turn, roll. The simplest, and very ancient, valve is simply a freely hinged flap which swings down to obstruct fluid (gas or liquid) flow in one direction, but is pushed up by the flow itself when the flow is moving in the opposite direction. This is called a check valve, as it prevents or "checks" the flow in one direction. Modern control valves may regulate pressure or flow downstream and operate on sophisticated automation systems. Valves have many uses, including controlling water for irrigation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Records
Valve Records is an Australian record label, releasing a wide range of alternative artists both local and international. The label was created by Paul Curtis in 1994 to support the local bands he was managing. Regurgitator, a successful band he manages, however, would not see a release on Valve until 2003–2004 after a split with Warner EastWest and the completion of the first Band in a Bubble project in Melbourne's Federation Square. Artists Over the past 14 years, Valve's diverse range of artists has included such music artists as: Anubian Lights, Audio Active, Bandito Folk, Boredoms, Broken Doll, Cobra Killer, Ed Kuepper, Curseovdialect, The Datsuns, Dear Nora DJ Me DJ You, Drop the Lime, Dry & Heavy, Ex-Girl, Frikstailers, Full Fathom Five, Future Islands, Kiley Gaffney, Gonzales, I Heart Hiroshima, Ivy, Jakob, Kid606, Messer Chups, Mocky, Mono, New Pants, Ouch My Face, Omar Souleyman, Pangaea, Ponyloaf, Scul Hazzards, Sekiden, Shonen Knife, Sixfthick, Soma Rasa, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Train
A valvetrain or valve train is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. The intake valves control the flow of air/fuel mixture (or air alone for direct-injected engines) into the combustion chamber, while the exhaust valves control the flow of spent exhaust gasses out of the combustion chamber once combustion is completed. Layout The valvetrain layout is largely dependent on the location of the camshaft. The common valvetrain configurations for piston engines - in order from oldest to newest - are: * Flathead engine: The camshaft and the valves are located in the engine block below the combustion chamber. * Overhead valve engine: The camshaft remains in the block, however the valves are located in the cylinder head above the combustion chamber. * Overhead camshaft engine: The valves and camshaft(s) are in the cylinder head above the combustion chamber. Components The valvetrain consists of all the compo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Gear
The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It can also serve as a reversing gear. It is sometimes referred to as the "motion". Purpose In the simple case, this can be a relatively simple task as in the internal combustion engine in which the valves always open and close at the same points. This is not the ideal arrangement for a steam engine, though, because greatest power is achieved by keeping the inlet valve open throughout the power stroke (thus having full boiler pressure, minus transmission losses, against the piston throughout the stroke) while peak efficiency is achieved by only having the inlet valve open for a short time and then letting the steam expand in the cylinder (expansive working). The point at which steam stops being admitted to the cylinder is known as the '' cutoff'', and the optimal positio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve RF Amplifier
A valve RF amplifier ( UK and Aus.) or tube amplifier (U.S.) is a device for electrically amplifying the power of an electrical radio frequency signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of transmitters, transmitter output stages switching to transistors somewhat later. Specially constructed valves are still in use for very high power transmitters, although rarely in new designs. Valve characteristics Valves are high voltage / low current devices in comparison with transistors. Tetrode and pentode valves have very flat anode current vs. anode voltage indicating high anode output impedances. Triodes show a stronger relationship between anode voltage and anode current. The high working voltage makes them well suited for radio transmitters and valves remain in use today for very high power short wave radio transmitter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Audio Amplifier
A valve audio amplifier ( UK) or vacuum tube audio amplifier ( US) is a valve amplifier used for sound reinforcement, sound recording and reproduction. Until the invention of solid state devices such as the transistor, all electronic amplification was produced by valve (tube) amplifiers. While solid-state devices prevail in most audio amplifiers today, valve audio amplifiers are still used where their audible characteristics are considered pleasing, for example in music performance or music reproduction. Instrument and vocal amplification Valve amplifiers for guitars (and to a lesser degree vocals and other applications) have different purposes from those of hi-fi amplifiers. The purpose is not necessarily to reproduce sound as accurately as possible, but rather to fulfill the musician's concept of what the sound should be. For example, distortion is almost universally considered undesirable in hi-fi amplifiers but may be considered a desirable characteristic in performance. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Amplifier
A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers in the 1960s and 1970s. Valve amplifiers can be used for applications such as guitar amplifiers, satellite transponders such as DirecTV and GPS, high quality stereo amplifiers, military applications (such as radar) and very high power radio and UHF television transmitters. History Origins Until the invention of the transistor in 1947, most practical high-frequency electronic amplifiers were made using thermionic valves. The simplest valve (named diode because it had two electrodes) was invented by John Ambrose Fleming while working for the Marconi Company in London in 1904. The diode conducted electricity in one direction only and was used as a radio detector and a rectifier. In 1906 Lee De Forest added a third e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Valves
The Valves were a punk rock band from Edinburgh, Scotland. One of the early British punk bands, they were chronicled in Henrik Poulsen's book '' 77: The Year of Punk and New Wave'', and featured Dave Robertson as 'Dee Robot' on vocals, G. Dair / Teddy Dair a.k.a. Gordon Dair on drums, Gordon Scott or 'Pada' on bass guitar and Ronnie Mackinnon on guitar The guitar is a fretted musical instrument that typically has six strings. It is usually held flat against the player's body and played by strumming or plucking the strings with the dominant hand, while simultaneously pressing selected stri .... The Valves released three singles and then broke up in 1979. They reformed for a one-off gig in Edinburgh 21 December 2013. In 2015, Ronnie, Pada and Gordon joined up with Joe Donkin, of The Cheetahs and Gordon Mackinnon, on keyboards. They are currently touring under The Valves name, playing material from the Valves, the Cheetahs and new material. Dave/Dee now lives in Belgium. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Hall
A valve hall is a building which contains the valves of the static inverters of a high-voltage direct current plant. The valves consist of thyristors, or at older plants, mercury arc rectifiers. Mercury arc rectifiers are usually supported by insulators mounted on the floor, while thyristor valves may be either supported by insulators or hung from the roof of the valve hall. The latter required a stronger ceiling structure, however the hall and the static inverter can better survive earthquakes compared to valve structures standing on the floor. A valve hall is equipped with heating and cooling equipment to control the temperature of the mercury arc rectifiers (which operate best over a narrow temperature range) or thyristors. The valve hall also protects the valves from weather and dust. Several valve assemblies, connected in series for the required terminal voltage, may be installed in the valve hall building. High voltage bushings are supported through the walls of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve (given Name)
Valve is an Estonian feminine given name. As of 1 January 2022, 795 women in Estonia have the first name Valve, making it the 217th most popular female name in the country. The name is most commonly found in Jõgeva County, where 18.27 per 10,000 inhabitants of the county. bear the name. Individuals bearing the name Valve include: * Valve Kirsipuu (1933–2017), Estonian economist and politician *Valve Pormeister Valve Pormeister ''née'' Ulm (13 April 1922 – 27 October 2002) was an Estonian landscape architect who became an architect. She was one of the first women to influence the development of Estonian architecture, becoming one of the country's most ... (1922–2002), Estonian landscape architect and architect * Valve Raudnask (born 1936), Estonian journalist and politician References {{Given name Feminine given names Estonian feminine given names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Amplification Company
{{For, the anti-cheat software, Valve Anti-Cheat Valve Amplification Company (VAC) is a U.S. supplier of high end audio electronics, principally utilizing vacuum tube technology. It was founded in 1990 by Kevin Hayes (b. 1959) and Channing W. Hayes (1923–2009). A Florida corporation, as of 2011 it is located in Sarasota, Florida, U.S. It is well known for having produced the Marantz Classic series of amplifiers for Marantz Japan from 1996 to 1998 (Marantz Model 7 / 7C, Model 8B, Model 9), as well as the VAC-designed Model 66 integrated amplifier. In addition, it redeveloped and produced the first 200 recreations of the LA-2A leveling amplifier for Universal Audio United Recording Electronics Industries (UREI) was a manufacturer of recording, mixing and audio signal processing hardware for the professional recording studio, live sound and broadcasting fields. History Bill Putnam Sr. founded Universa ... in 1998. Company history VAC was founded in 1990 by Kevin Hayes and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Corporation
Valve Corporation is an American video game developer, video game publisher, publisher, and digital distribution company headquartered in Bellevue, Washington. It is the developer of the software distribution platform Steam (service), Steam and the franchises ''Half-Life (series), Half-Life'', ''Counter-Strike'', ''Portal (series), Portal'', ''Day of Defeat'', ''Team Fortress'', ''Left 4 Dead (series), Left 4 Dead'' and ''Dota''. Valve was founded in 1996 by former Microsoft employees Gabe Newell and Mike Harrington. Their debut game, the first-person shooter (FPS) ''Half-Life (video game), Half-Life'' (1998), was a critical and commercial success; with its realism, scripted sequences and seamless narrative, it had a lasting influence on the FPS genre. Harrington left in 2000. In 2003, Valve launched Steam, followed by ''Half-Life 2'' in 2004. With advanced Physics engine, physics systems and an increased focus on story and characters, ''Half-Life 2'' received critical acclaim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
