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Valves

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Published: 30 November 2023
Fig. 8.1 Typical die castings (a) steering gear, (b) transmission valves ( Ref 1 ), (c) engine cylinder block ( Ref 2 ) More
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Published: 01 September 2008
Fig. 41 (a) Forging tools for production of automotive engine valves; the analyzed die was painted in blue. (b) Forged valve and, in detail, the grooves produced when using worn dies. (c) Three analyzed regions, marked “A”, “B” and “C”. “A” is the main wear region, but “B” is where a large More
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Published: 01 December 1995
Fig. 2-96 12 in. (300 mm) plug valves installed on gas scrubbers More
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Published: 01 December 1995
Fig. 3-23(b) Assembly of 24 in. valves More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270130
EISBN: 978-1-62708-301-0
... Abstract An aircraft crashed following the loss of yaw control in full airborne flight. The subsequent discovery of broken shutter bolts in the rear pitch reaction control valve led to an inspection campaign that found bolt failures of a similar nature in valves on several other aircraft...
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Published: 30 November 2013
Fig. 1 Distorted engine valve spring (left) compared with normal valve spring. Improper microstructure resulted in inadequate strength and hardness at the operating temperature. Source: Ref 1 , 2 More
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Published: 01 December 2018
Fig. 6.28 Valve less and vacuum valve systems More
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Published: 01 February 2005
Fig. 22.28 Exhaust valve forming process. (a) Initial billet. (b) Extrusion of valve stem. (c) Upsetting of valve head [ Tulsyan et al., 1993 ] More
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Published: 01 August 2012
Fig. 12.17 Use of prefill valve in hydraulic press: (a) the prefill valve is opened when the slide is in the fast approach stroke, (b) the prefill valve is closed during the forming stroke, and (c) the prefill valve is opened when the slide is in fast return stroke. Source: Ref 12.27 More
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Published: 01 December 1995
Fig. 11-9 Cast-weld intercept valve. An assembly weld of a valve casting and a flanged elbow casting More
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Published: 01 January 2000
Fig. 6 Deep pits on a carbon steel check valve that was inadvertently exposed to hydrochloric acid during a plant upset. Note how pits intersect to form areas of jagged metal loss. A steel probe tip is also shown in the photo. Source: Nalco Chemical Company More
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Published: 01 January 2000
Fig. 11 Closeup of annular regions below rubber O-rings on a cast-iron valve block. Note how damage varies from hole to hole, probably due to variation in the crevice geometry. Source: Nalco Chemical Company More
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Published: 01 June 2016
Fig. 9.13 Experimental setup for repair of the actuator valve body. Courtesy of South Dakota School of Mines and Technology More
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Published: 01 June 2016
Fig. 11.7 (a) Corrosion and sealing surface valve actuator body repair application (TD-3, U.S. Navy), using cold-sprayed aluminum on steel. (b) Airframe-mounted accessory drive housing repair buildup. Source: Ref 11.14 More
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Published: 30 November 2013
Fig. 8 Thermal-fatigue crack in the hardfacing alloy on an exhaust valve from a heavy-duty gasoline engine (~2.5×). Advanced burning originated from the large crack. Additional thermal-fatigue cracks are also present on the valve face. Engine efficiency rapidly deteriorates from increasing More
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Published: 30 November 2013
Fig. 14 (a) Incipient burning on the valve face of an automotive engine exhaust valve caused by microporosity in the hardfacing alloy (~2.5×). (b) Severe, destructive burning (guttering) in an automotive-engine exhaust valve (~2×). The very hot exhaust gases (blowby) rushing through the cavity More
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Published: 01 September 2008
Fig. 42 (a) Microstructure of working regions of valve forging die in Fig. 41 (region A). Note the intense cracking and thick nitrided layer (double the expected). Also note the surface white layer, which corresponds to brittle untempered martensite, obtained by rehardening of the tool More
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Published: 01 September 2008
Fig. 10 Pinhole in the valve seat at a magnification of 40 : 1 More
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Published: 01 September 2008
Fig. 18 Exhaust valve seat with oxidized hard-phase particles More
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Published: 01 December 2015
Fig. 4 Hardfaced stainless steel plug and seat, from a slurry flow control valve, that were eroded by high-velocity flow through the narrow orifice created during throttling More