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vacuum pumps

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Published: 30 April 2020
Fig. 7.23 Vacuum binder removal relies on a controlled gas leak into the chamber that causes gas flow over the heated components. The binder picked up by the gas flow is condensed in the chilled trap to avoid contamination of the vacuum pumps. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900089
EISBN: 978-1-62708-350-8
... Pumps , Modern Vacuum Practice , McGraw Hill , 1989 , p 71 3. Harris N. , Oil Sealed Mechanical Pumps , Modern Vacuum Practice , McGraw Hill , 1989 , p 72 4. Pye D. , “ Practical Nitriding ” course notes, 1986 5. Gruen R. , Pulse Plasma Treatment...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900185
EISBN: 978-1-62708-350-8
.... If the localized overheating is within 55 °C (100 °F), then nonuniform case metallurgy will occur. Temperature uniformity within the process retort, be it gas or plasma nitriding, is mandatory. Each week, check the vacuum pump oil in terms of level and condition. Ensure that the vacuum pipe connecting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900241
EISBN: 978-1-62708-350-8
..., a vacuum pump, and a pulsed plasma power pack. The procedure is accomplished at room temperature. Plasma is perhaps the most effective method of surface cleaning and can produce a sterile surface. In fact, the process is used as a medical sterilization procedure for medical components such as bloodpack...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460107
EISBN: 978-1-62708-285-3
... installation to supply both helium and nitrogen for cold spray processing. Here, helium is supplied from high-pressure tube trailers, and nitrogen is drawn from a liquid nitrogen tank, pressurized by a cryogenic pump and gasified in a high-pressure vaporizer. Fig. 4.11 Gas supply systems for cold spray...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140189
EISBN: 978-1-62708-264-8
... of approximately 900 °C (1650 °F). See Ref 17.6 for more discussion. Plasma and Vacuum Carburizing Atmospheric pressure is 760 mm of mercury, or 14.7 lb/in. 2 . If electrodes are sealed into either end of a glass tube, the pressure inside the tube is reduced to between 1 to 20 mm with a vacuum pump...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290139
EISBN: 978-1-62708-319-5
... popular. The gas sweeps through the furnace, at, for example, 10 kPa (0.1 atm) pressure, while the vacuum pumps continuously pull gas from the hot zone. During gas flow, binder vapor products are swept away from the compacts. As shown in Fig. 7.23 , a cold trap in the vacuum line condenses burnout vapor...
Book Chapter

By Eren Billur
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400181
EISBN: 978-1-62708-316-4
... a small cylinder and pump to move the slide and create vacuum in the large cylinder to achieve prefill ( Ref 12.2 ). Direct Drive Direct drive (also known as pump drive) in a hydraulic press refers to a hydraulic circuit where the high-pressure fluid is supplied only by pump(s) ( Fig. 12.10...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440055
EISBN: 978-1-62708-262-4
... these conditions, the amount of original air remaining in the work chamber is approximately 0.1%. This degree of vacuum can normally be obtained by “pumping down” with a mechanical pump. There are, however, some heat treating operations involving highly alloyed materials that require a “harder” vacuum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410029
EISBN: 978-1-62708-280-8
... . The wooden pattern is mounted on a hollow pattern plate with connection to a vacuum pump. Fine holes of 1 to 1.5 mm (0.04 to 0.06 in.) diameter are drilled through the pattern to communicate with the vacuum chamber. Frame 2 . A plastic sheet is spread above the pattern and softened by heating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
... by hydrocarbon contamination from residual gaseous hydrocarbons in the shielding gas, oils on the components being welded or, if an inert atmosphere welding chamber is being used, from vacuum pump oils or the breakdown of elastomers in the chamber because of the effects of heat, vacuum, or ultraviolet light...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900109
EISBN: 978-1-62708-358-4
... a partial vacuum. Vacuum furnaces with pressures of 26 Pa to 1.3 mP (200 to 0.01 μm Hg) are possible with the sophisticated pumping equipment integral to vacuum furnaces. Vacuum furnaces have historically been popular with heat-treating processes such as brazing, sintering, and outgassing. More recently...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200173
EISBN: 978-1-62708-354-6
... sizes can be made using this process. Castings up to 15,000 lb (6804 kg) are currently being produced. The disadvantages: Specially designed matchplates and flasks are required. Extensive use of vacuum pumps and hoses is necessary, which require maintenance. This process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410247
EISBN: 978-1-62708-280-8
... Gravity permanent mold casting, low pressure permanent mold casting A 356 T6 Cradle cross members Low pressure permanent mold casting, vacuum die casting A 356 T6, Silafont 36 T5, Mercalloy T5 Wheels Gravity permanent mold casting A 356 T6 Brake master cylinders and antilock brake system...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030200
EISBN: 978-1-62708-282-2
... basic types: flowing wells, which have a natural flow of hydrocarbons and water to the surface, and artificially lifted wells, which require some form of pump. The latter type includes rod-pumped wells, which use a positive-displacement downhole pump connected to the surface by rods; gas-lifted wells...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220281
EISBN: 978-1-62708-341-6
..., each tube rests on a rolling cart which proceeds through a long oven. The cart contains its own vacuum pumping system which exhausts the air in the tube as it proceeds through the oven. The cart also carries a work coil which surrounds the electron-gun structure in the tube. This coil is connected...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030247
EISBN: 978-1-62708-282-2
... oxygen contamination through leaking pump seals, casing and process vents, open hatches, open handling (as in mud pits during drilling, trucking, and so on), and in seawater-injection systems highly likely. Also, failure of oxygen-removal processes (gas stripping and chemical scavenging) is a relatively...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280041
EISBN: 978-1-62708-267-9
... commonly, by charging the furnace through hoppers lowered through a large vacuum lock (bulk charger) located over the crucible. The furnace is capable of quickly pumping down to or maintaining vacuum levels below 100 μm (and often into the <10 μm) range. The virgin material is melted by application...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410103
EISBN: 978-1-62708-280-8
... cast machine Space for provision of overflows, vents, and vacuum Gate and flash trimming Guidelines for Parting Plane Selection General guidelines for parting plane selection may have conflicting requirements, and compromises have to be made including: Choosing the parting plane...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350087
EISBN: 978-1-62708-315-7
... the gun or the workpiece. Out-of-vacuum units usually involve shrouding the workpiece; a partial vacuum (10 –2 torr, or 13 Pa) is obtained in the work area by mechanical pumps. Laser-Beam Hardening Lasers can be used to perform selective hardening with hardening depths and material constraints...