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pressure-relief valves

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Published: 01 August 2012
Fig. 12.7 (a) Pressure relief valve and (b) two-way pressure regulator. Source: Ref 12.13 More
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
... of pressure valves: pressure relief valves and pressure regulators. A pressure relief valve senses the incoming pressure (inlet, P-line), whereas a pressure regulator senses the output pressure (outlet, A-line). In the pressure relief valve, an adjustable compression spring presses a sealing element to its...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400203
EISBN: 978-1-62708-316-4
... presses. The hydraulic cushion cylinder is connected to the accumulator by a servo valve, a check valve, and a relief valve. During forming, as the cylinder is moving downward, the servo valve controls the fluid flow from the hydraulic cylinder to the accumulator, thereby maintaining the desired pressure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460107
EISBN: 978-1-62708-285-3
.... The final system component is a pressure-control manifold to regulate the delivery pressure from the tubes at the desired process feed pressure into the houseline. This normally includes a pneumatic regulator that must be specified to handle the desired flow rate. Adequate houseline pressure-relief valves...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200158
EISBN: 978-1-62708-354-6
... in which each pass results in warpage. Unless the setup compensates for distortion or a constraint is applied, multi-pass welds will pull a weldment out of alignment. Considerable care must be used in the set-up and in the sequence of welding. Stress-relief heat treatments after a number of weld passes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040115
EISBN: 978-1-62708-300-3
... of deformation. As illustrated in Fig. 11.1(b) , during the downstroke in modern direct-driven presses a residual pressure is maintained in the return cylinders or in the return line by means of a pressure relief valve. Thus, the upper ram is forced down against pressure and the dwell inherent in the free fall...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120039
EISBN: 978-1-62708-269-3
... not close during the HIP cycle. These filler rods may be extra-low interstitial (ELI) or normal interstitial to prevent excess oxygen buildup in the weld metal. Excellent quality weld deposits are routinely obtained when proper practice is used. Generally, all weld-repaired castings are stress-relief...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030292
EISBN: 978-1-62708-282-2
... and pressures. Among the many metals and alloys that are available, relatively few are used for the construction of process equipment and piping ( Ref 1 ) due to the adverse influence on cost. However, materials used in process units include a wide variety of alloys, including carbon steel, cast irons, low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
... in the heat-affected zone (HAZ) and use of appropriate preheating and stress relief treatment Design of weldments to eliminate notches and to have relatively large cross-sectional areas so that unit stresses are reduced Interstitial Contamination Weldment mechanical properties can be degraded...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320103
EISBN: 978-1-62708-332-4
..., although it may pose some extra handling and other logistic issues. Thermal stress-relieving is the most dependable method. Other methods such as vibratory stress relieving and natural aging produce less reliable and less consistent results. The percentage of stress relief and the rate of stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820115
EISBN: 978-1-62708-339-3
...) austenitizing cycle, specimen A1, (threshold 65% of yield strength) and weldments with only stress relief treatments after welding, specimens A3 and A4, (threshold 10% and 15% of yield strength), there is a significant decrease in the SSC resistance of the weldments. A reheat treatment after welding consisting...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370095
EISBN: 978-1-62708-447-5
... castings Stress relief cycle guidelines Table 5.5 Stress relief cycle guidelines Type and class of casting Section thickness range, mm Stress relieving cycle(a), °C (°F) Unalloyed gray iron Class 20 and 30 Up to 50 2 h at 565 to 579 (1050 to 1075) 50 to 100 1.5 h per 25 mm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200115
EISBN: 978-1-62708-354-6
... enough that it is critical to have close cooperation between the designer and the foundry engineer to avoid surface imperfections and associated costs. Repair of a surface discontinuity usually involves removal, inspection, welding, weld dressing, final inspection, and a stress relief heat treatment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030215
EISBN: 978-1-62708-282-2
..., for whatever reason, may lower the temperature of vessels, piping, and relief valves to below the ductile-to-brittle transition point, causing catastrophic brittle fracture. The selection of special steels, qualified by impact testing at the lowest expected temperature, may be appropriate. Review the Design...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.9781627082693
EISBN: 978-1-62708-269-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900071
EISBN: 978-1-62708-350-8
... an extrusion die. (a) Bearing face and relief clearance area. (b) Aluminum billet for extrusion against the die face, which is soft in the core. Side A will compress and crack; B will stretch and tear on the case. Fig. 10 Pulsed dc plasma showing P max , P min , and P temp (where P = power...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060239
EISBN: 978-1-62708-355-3
... a liquid cryogen vaporizes. Such expansion is dangerous when it occurs in closed containers or fixture components with potential for trapped gas/liquid volumes. Cryostats must include safety pressure-relief capabilities; redundancy is necessary because mechanical relief valves may freeze or malfunction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320011
EISBN: 978-1-62708-332-4
... considerations to address early on. Different state tax incentives also play a vital role because they give relief for the first few years, accommodating an anticipated slow ramp-up and potential launch issues. 3.6.4 Generation of Layout Plant layout is an arrangement of workplaces, machinery, equipment...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400233
EISBN: 978-1-62708-316-4
...- nal for stopping the action of a press, usually after a complete cycle, by disengaging the clutch mechanism and engaging the brake mechanism. axisymmetric drawing The drawing of shapes having an axis of symmetry such as cones and round cups B back-off See relief. back-ups (1) Perishable details made...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4