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Topic: High vacuum

	Vacuum - Wikipedia, the free encyclopedia
		High vacuum is vacuum where the MFP of residual gases is longer than the size of the chamber or of the object under test.
		Vacuum is often also measured using the barometric scale, or as a percentage of atmospheric pressure in bars or atms.
		Vacuum fluctuations may also be related to the so-called cosmological constant in the theory of gravitation, if indeed this entity were to be observed in nature on a macroscopic scale.
	en.wikipedia.org /wiki/Vacuum (4169 words)

	High Pressure & Vacuum
		Typically, one side of the element is exposed to a reference vacuum and the instrument measures the mechanical deformation that occurs when an unknown vacuum pressure is exposed to the other side.
		This instrument measures vacuums down to 10-7 torr by detecting the deceleration caused by molecular friction on a ball that is spinning in a magnetic field.
		Vacuum is determined by measuring the length of time it takes for the ball to drop from 425 to 405 revolutions per second after drive power is turned off.
	www.omega.com /literature/transactions/volume3/high3.html (1674 words)

	High Pressure & Vacuum
		Engineers first became interested in vacuum measurements in the 1600s, when they noted the inability of pumps to raise water more than about 30 ft. The Duke of Tuscany in Italy commissioned Galileo to investigate the "problem." Galileo, among others, also devised a number of experiments to investigate the properties of air.
		For intermediate vacuum applications (between 10-4 and 10-2 torr), capacitance manometers are the best in terms of performance, but are also the most expensive.
		For low vacuums (higher pressures) between atmospheric and 10-2 torr, Bourdon tubes, bellows, active strain gages, and capacitance sensors are all suitable.
	www.omega.com /literature/transactions/volume3/high2.html (441 words)

	Ultra high vacuum - Wikipedia, the free encyclopedia
		Removal of water and similar gases generally requires baking the UHV system at 200 to 400 °C while vacuum pumps are running.
		During chamber use, the walls of the chamber may be chilled using liquid nitrogen to reduce outgassing further.
		Typically, there is no single vacuum pump that can operate all the way from atmospheric pressure to ultra high vacuum.
	en.wikipedia.org /wiki/Ultra_high_vacuum (700 words)

	High Vacuum Pump sources
		Edwards High Vacuum Diffusion Pump Heaters from Dalton outperform OEM heaters.
		To achieve high vacuum, an oil diffusion or turbomolecular pump in series with a mechanical pump is used.
		High Vacuum Pump Manufacturers Travaini's high vacuum pumps are designed to operate flawlessly under the most difficult conditions, even when highly saturated vapors or solid particles occur in the...
	www.pumptaps.com /heatpump/HighVacuumPump (1894 words)

	High Vacuum by Vaccon Vacuum Products
		Vaccon's High Vacuum (HighVac) Series of vacuum pumps employ an additional venturi cartridge assembly, which acts in conjunction with the primary venturi cartridge assembly to boost the pumps' vacuum generating capabilities.
		The result of this multi-cartridge design is a line of pumps capable of producing vacuum levels in excess of 29.5"Hg - perfect for use in high elevation locations or in applications where extra vacuum force is required.
		Vacuum level is effected by elevation and barometric pressure.
	www.vaccon.com /highvacuum.html (298 words)

	High Vacuum - Big Vacuum Guide
		High and ultrahigh vacuum pumps operate efficiently in the high vacuum region and develop...
		EnviroView 1000â¢ - High Vacuum - A high vacuum environmental chamber...
		High vacuum technologies and ultra high purity gas are part of the lithography industry and uniquely position BOC Edwards as a world leader in these areas.www.bocedwards.com/Semiconductor_Subsystems/ Lithography/ high - vacuum -technology.cfm
	www.bigvacuumguide.com /high-vacuum.html (735 words)

	High Vacuum Coating Plant - Big Vacuum Guide
		High vacuum engineering, Helium leak detection, vacuum pumps, vacuum pump service, freeze dryers,...
		Through the use of vacuum it is possible to create coatings with a high degree of...
		In thin-film coating, a metal or compound is evaporated under high vacuum...
	www.bigvacuumguide.com /high-vacuum-coating-plant.html (682 words)

	Edwards High Vacuum International
		Edwards High Vacuum International, a world leader in the design and manufacture of vacuum systems and components, has been supplying vacuum measuring instruments around the world for over 35 years.
		The company's mission statement is; "to excel as the world's leading supplier of vacuum equipment by providing advanced technology and services of the highest quality which ensure long term customer satisfaction and acclaim".
		Edwards remains committed to research and development in the field of vacuum measurement and will continue to harness new technologies by creating innovative new products to meet the changing requirements of its customers.
	www.chell.co.uk /edwards/edwards.htm (269 words)

	high vacuum solenoid valve (Site not responding. Last check: 2007-10-20)
		Solenoid vacuum control valve means and apparatus and system for controlling the air-fuel...
		high dollar stainless valve, they can be used in a wider variety of applications than any other solenoid...
		Our Vacuum Solenoid Valves are high quality which has resulted in its being OE to Visteon and Behr.
	www.nettome.info /ipages/solenoid/high-vacuum-solenoid-valve (262 words)

	High Vacuum System Parts and Acessories - Intlvac Canada
		Our knowledge and expertise in service and development of high vacuum systems are well beyond the reach of other world wide competitors.
		Intlvac is the exclusive distributor of over 16 major renowned vacuum product companies in the world and offers products that cover the complete range of high vacuum applications.
		Our ion beam system parts and accessories section has the ability to not only view our exclusive high vacuum system products, but also purchase them on-line.
	www.intelvac.com (190 words)

	Aluminum Ultra High Vacuum Chambers (Site not responding. Last check: 2007-10-20)
		Atlas Technologies manufactures ultra high vacuum (UHV) aluminum vacuum chambers with a thin dense aluminum oxide this serves as a resistive barrier reducing diffusion and desorption of high vacuum and ultra high vacuum contaminates (Hydrogen, Oxygen and Carbon).
		Once baked Atlas' aluminum vacuum chambers generally cycle to high vacuum and ultra high vacuum levels faster than stainless chambers and require less pumping.
		Extruded aluminum vacuum chambers can be an incredibly economical way to produce complex vacuum chamber geometries such as beam tubes, water cooling or gas channels and cooling or titanium sublimation pump fins...
	atlasuhv.com /products/aluminum_chambers/AluminumVacuumChambers2.php (627 words)

	Electronics 27
		The plates required high voltages at small currents, perhaps 90V at a few mA, and their supply was called the B battery.
		In a vacuum tube, the electron acquires a kinetic energy as it is accelerated, which it gives up all at once when it collides with the plate.
		Vacuum tubes come with metal or glass envelopes, and in latter days with either the familiar octal arrangment of 8 pins, or as miniature glass tubes with 7 or 9 pins.
	www.du.edu /~etuttle/electron/elect27.htm (23318 words)

	☞ vacuum - high vacuum
		A&J Vacuum Services, Inc. is a turbo pump repair and service company specializes in high vacuum equipment such as turbomolecular pumps, dry pumps, and vacuum pumps.
		KEY HIGH VACUUM PRODUCTS, INC. was founded in 1976 and from its inception the objective of the company has been to provide high quality vacuum components at a competitive cost.
		High vacuum is vacuum where the MFP of residual gases...
	www.all-vacuum.info /highvacuum (785 words)

	High Vacuum Rotary Vane Vacuum Pumps
		To meet your demands for high throughputs with high ultimate vacuum BOC Edwards have developed a totally new concept in vacuum pumps - the world's first dual-mode vacuum pump.
		This radical operation is matched by innovative design features such as a pumping mechanism incorporating advanced new materials, a fully-featured BOC Edwards motor and the incorporation of a fast-acting inlet valve to seal the pump for suck-back protection.
		In its high vacuum mode, the RV pump is ideal for analytical instruments, electron microscopes, physics research.
	www.tedpella.com /vacuum_html/vacpump.htm (561 words)

	ScienceDaily: Browse Topics > Science > Physics > Vacuum (Site not responding. Last check: 2007-10-20)
		Vacuum Technology and Vacuum Coating Forum - Discuss subjects about vacuum physics, vacuum and coating systems, evaporation coating and sputtering technology.
		Vacuum Technology Developed To Control Insects In Wood (July 28, 2003) -- Virginia Tech wood scientists hope that their vacuum-drying project will benefit wood pallet and container manufacturers and hardwood sawmill businesses across the...
		Technology To Recycle Vacuum Insulation Panels (May 28, 2005) -- This new form of panel will provide between 5 and 7 times the insulation capacity over current technologies, with the added advantage that it does not require a modification of its thickness nor a...
	www.sciencedaily.com /directory/Science/Physics/Vacuum (914 words)

	High Vacuum Greases
		We have tried to provide you with the needed information to make an informed kind of decision as to which high vacuum grease is going to have the highest likelihood of working in your application.
		When applying any high vacuum grease that comes in contact with an "O" ring, some caution in the selection of the grease is in order.
		Not only are the vacuum characteristics with regard to off-gassing important, but so is the compatibility of the grease with the affected "O" ring.
	www.2spi.com /catalog/vac/vacumain2.html (715 words)

	Vacuum pump service.Vacuum Pump Repair.Dry pumps QDP40,QDP80,IQDP40,IQDP80,ESDP12,ESDP30 (Site not responding. Last check: 2007-10-20)
		HIGH VACUUM PUMPS :::: America One Surplus is a leading supplier of refurbished High vacuum pumps.
		Vacuum pump repair service,Vacuum Pump Repair,ALCATEL Vacuum pump repair,BOC EDWARDS Vacuum pump repair,SEIKO SEIKI Vacuum pump repair,LEYBOLD Vacuum pump repair,BALZERS Vacuum pump repair,PFEIFFER Vacuum pump repair,VARIAN Vacuum pump repair.CTI Vacuum pump repair,WELCH Vacuum pump repair,STOKES Vacuum pump repair,KINNEY Vacuum pump repair,EBARA Vacuum pump repair,OSAKA Vacuum pump repair,BUSCH Vacuum pump repair.
		Vacuum pump repair service,Vacuum Pump Repair,ALCATEL Vacuum pump repair,BOC EDWARDS Vacuum pump repair,SEIKO SEIKI Vacuum pump repair,LEYBOLD Vacuum pump repair,BALZERS Vacuum pump repair,PFEIFFER Vacuum pump repair,VARIAN Vacuum pump repair.CTI Vacuum pump repair,WELCH Vacuum pump repair,STOKES Vacuum pump repair,KINNEY Vacuum pump repair,EBARA Vacuum pump repair,OSAKA Vacuum pump repair,BUSCH Vacuum pump repair
	www.vacuumpumpsalesandrepair.com (1160 words)

	high vacuum pumps - high vacuum pumps Information (Site not responding. Last check: 2007-10-20)
		High Vacuum Pumps Supplier's Directory of Thomas Register
		The rotary high vacuum pumps are ideal for handling dry and clean air.
		Vacuum pumps, Turbo pumps, Vakuumtechnik, Vakuumpumpen von Pfeiffer...
	www.vacuumguidezone.info /high-vacuum-pumps (136 words)

	High Vacuum (Site not responding. Last check: 2007-10-20)
		The company has links to many other leading High Vacuum manufacturers and this independence enables us to offer our customers the right solution to their vacuum problems at the right price.
		Whether it's a basic pump with manifold and dial gauge, or a sophisticated combined system to take you to a deep vacuum or a central vacuum system - "tankunit", post, fax or email us your specification so we may quote you.
		vacuum pumps vacuum pump repair vacuum pump service vacuum pump reconditioning vacuum pump spares vacuum pump spares kits high vacuum medium vacuum edwards high vacuum speedivac vacuum oils vacuum fittings freeze dryers vacuum valves vacuum coating helium leak detectors mills vacuum vacuum gauges vacuum accessories vacuum pump hire
	www.girovac.com /highvac.htm (704 words)

	High Vacuum Pumping Oil - Worldwide (Site not responding. Last check: 2007-10-20)
		Manufacturer of vacuum pumps, pumping systems, leak detectors, gauges, vacuum valves and fittings for use in rough, medium and high vacuum applications including: Analytical Instruments, Automotive, Coatings, Electrical, Food Processing and Packaging, Freeze Drying, Furnace and Metallurgy, Lighting, Medical, RandD, Refrigeration and Air Conditioning, Semiconductors and others.
		Manufacturers of vacuum pumps, pressure blowers, exhaust gas management systems, thin film coating equipment, vacuum measuring instruments, pharmaceutical freeze dying and filling systems, speciality gases and gas/chemical dispense systems.
		Vacuum Pump, busch, blowers, busch vacuum pump, water blower, low pressure blowers, sewage blowers, industrial vacuum pumps, vacuum systems.
	www.kellysearch.com /qz-product-47897.html (957 words)

	Vacuum technology (Site not responding. Last check: 2007-10-20)
		The behavior of a vacuum system is characterised by the three parameters P (pressure), S (volumetric flow), and Q (gas throughput).
		S is particularly useful, since most pumps are designed to have a constant volumetric flow rate over a wide range of pressures.
		This expression has the form of an 'Ohm's law' for vacuum, where C is like 1/R, P is like volts, and Q is like current.
	photon.physics.ucf.edu /XRAY/Courses/Phy904/Vacuum/Vacuum.htm (1437 words)

	Vacuum Pumps - Edwards High Vacuum
		Edwards mechanical high vacuum pumps are powerful, two-stage direct-drive workhorses, pumping 75, 113 or 190 liters per minute (at 60 Hz operation) to clear out chambers and maintain vacuum with ease.
		Be sure to consider the attachment of an oil filter to your new vacuum pump in order to ensure a safe working environment for not only yourself but for those around you!
		Be sure to select the appropriate high vacuum grease from the world's largest selection of vacuum greases on the internet.
	www.2spi.com /catalog/instruments/edwards-pumps.shtml (336 words)

	A-VAC Industries the High Vacuum Superstore
		A-VAC Industries is a full service vacuum company with a huge parts department and professional service department.
		Since 1969 A-VAC has been proud to stock and distribute vacuum pumps, accessories and helium leak detectors from most major manufacturers, including Alcatel, Leybold, Welch and many others.
		A-VAC supplies vacuum pump parts, vacuum pump supplies and vacuum pump fluids for all types of vacuum pumps and vacuum equipment, mechanical pumps, diffusion pump and turbo pump applications.
	www.avac.com (99 words)

	High vacuum,Vacuum pump,Turbo pump sales,Turbo pump service,Vacuum pump repair,Vacuum pump sales & Service,ALCATEL,BOC ...
		We are a leading supplier of new and refurbished turbo pumps and controllers (frequency converters),(turbo,ion,cryo,diffusion,vane,oil free,dry,mechanical pumps),High Vacuum Pumps,Leak Detectors and vacuum equipment for the semiconductor and high vacuum related industries.
		Vacuum Technology,Vacuum pump service & sales,Turbo pump sales,Turbo pump service,Turbo pump repair,refurbished turbo pumps,turbo pumps sales+service,leybold turbo pump,leybold vacuum,seiko seiki turbo pumps,varian turbo pumps,edwards turbo pumps,alcatel turbo pumps,used turbo pumps,balzers turbo pumps,ebara,osaka.
		Vacuum pump service with over 40 years of accomplished vacuum pump experience.
	www.wishmasterjo.com /index18.html (584 words)

	Semiconductor Processing, Vacuum and Pressure Products, Equipment & Service Support - BOC Edwards
		BOC Edwards is a value-added supplier of gases and equipment for the world's most advanced manufacturing industries.
		vacuum products meet the evolving challenges of the analytical instrument and laboratory markets.
		Whether you need standard products or a high degree of customisation, our coating team at BOC Edwards is there to help you choose the right technology for your business.
	www.bocedwards.com (717 words)

	Resources for high vacuum (Site not responding. Last check: 2007-10-20)
		High water table/flat terrain a: climate for vacuum sewer system.
		Vacuum manipulation of volatile compounds,: A laboratory manual describing the application of high vacuum technique in experimental chemistry
		Itâs vacuum sealers, those versatile kitchen gadgets that allow you to freeze food, reheat it, store it in your cupboard or ship it safely around the world.
	www.vacuum-cleaners-heaven.info /high-vacuum.html (470 words)

	High Vacuum Gate Valve
		These high gate valves, manufactured of 304 stainless steel, are inert gas welded, have an easily removable internal mechanism which facilitates cleaning without removal of the valve from the system.
		The drive mechanism is designed with an over-center locking device to assure the proper sealing force with the atmospheric pressures from either direction.
		It has a low outgassing rate and a high conductance and can be baked at temperatures up to 200 C. For more info or pricing on this product, please click on: Request Information and include part:
	www.cookevacuum.com /hvgv.html (189 words)

	#1 Vacuum Furnace for High Temperature Laboratory Research (Site not responding. Last check: 2007-10-20)
		is a high temperature vacuum/inert gas atmosphere furnace designed specifically for university, industrial, and government research laboratories.
		No cooling water or drain is required and a standard 20 amp, 120 volt wall outlet (10 amp, 240 volt optional) provides sufficient electrical power to operate the furnace at full temperature.
		RED TURBO 1200°C turbomolecular pumped 200mm (8") diameter high vacuum furnace designed for vacuum brazing and annealing applications.
	www.rdwebb.com (152 words)

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