ASTM_F_431_-_04_2013.pdf

Designation:F43104(Reapproved 2013)An American National StandardStandard Specification forAir Performance Measurement Plenum Chamber for VacuumCleaners1This standard is issued under the fixed designation F431;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the acceptable details andtolerances for the plenum chamber used in specified airperformance measurement tests for vacuum cleaners.1.2 The plenum chamber is designed for vacuum measure-ments only.(WarningThe plenum chamber has been shownto accurately determine maximum air power values at varioustest points for vacuum cleaners.There is a possibility that theairflow values measured with orifices larger than 2 in.at highflow rates may be erroneous due to the proximity of the top andbottom surfaces to the orifice plate inlet.)1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM Standards:2F558 Test Method for Measuring Air Performance Charac-teristics of Vacuum CleanersF820 Test Method for Measuring Air Performance Charac-teristics of Central Vacuum Cleaning Systems2.2 ASTM Adjunct:Orifice Plate Holder Details(F431)33.Details3.1 Plenum chambers conforming to this specification shallbe fabricated in accordance with the dimensions,tolerances,and notes shown in the following figures:3.1.1 Plenum chamber assembly,see Fig.1.3.1.2 Orifice plate detail,see Fig.2.3.1.3 Orifice plate holder and assembly,see Fig.3.3.2 Manometer connection detail,see Fig.1(f),Note 17.4.Orifice Plates4.1 Orifice plates conforming to this specification shall befabricated in accordance to the dimensions,tolerances,andnotes shown in the following figure:4.1.1 Orifice plate dimensional detail,see Fig.2(a).4.1.2 Acceptable machined edges for orifice plates,see Fig.2(b).5.Keywords5.1 air performance;orifice plate;plenum chamber;vacuumcleaner1This specification is under the jurisdiction of ASTM Committee F11 onVacuum Cleaners and is the direct responsibility of Subcommittee F11.22 on AirPerformance.Current edition approved May 1,2013.Published July 2013.Originally approvedin 1975.Last previous edition approved in 2008 as F431 04(2008).DOI:10.1520/F0431-04R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from ASTM International Headquarters.Order Adjunct No.ADJF4031.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 FIG.1(a)Plenum Chamber(Material:see Note 8)FIG.1(b)Hose Connector Plate(Material:0.250-in.(6.35-mm)Steel)(continued)F431 04(2013)2 FIG.1(c)Hose Connector(Material:Aluminum or Steelsee Note 16)(continued)FIG.1(d)Flange Plate(Material:0.250-in.(6.35-mm)Steel)(continued)F431 04(2013)3 FIG.1(e)Cleaner Plate(Material:0.250-in.(6.35-mm)Steel)(continued)F431 04(2013)4 NOTE1All dimensions are measured from inside surfaces.NOTE2Interior must be clean,smooth,and free of projections or recesses on walls or attachment openings.Internal bracing should not be used tosupport plenum chamber walls.NOTE3Attachment port edge to be smooth and well rounded.NOTE4Orifice box must withstand 180 in.of water(336 mm Hg)negative static pressure without significant distortion of walls or joints afterchamber is completely fabricated and attachment made.NOTE5All joints and connections must be airtight.NOTE6Tolerances(unless otherwise specified):one-place decimal 60.031 in.(0.080 mm);two-place decimal 60.01 in.(0.25 mm);three-placedecimal 60.005 in.(0.13 mm).NOTE7Flange plate and manometer connection to be welded to chamber completely around the sides.NOTE8Plenum chamber minimum material specification 0.187 in.(4.75 mm)thick low carbon steel.NOTE90.060 in.(1.52 mm)thick rubber seal dimensioned similar to flange plate should be used to seal cleaner and hose connector plates.NOTE10Bore 0.375 in.(9.54 mm)through hole in plenum chamber for manometer connection and 3.000-in.(76.20-mm)diameter hole for orificeplate assembly.NOTE11All mating holes to be concentric to within 0.005 in.(0.13 mm)T.I.R.after assembly.NOTE12A 0.060-in.(1.52-mm)thick rubber seal dimensioned similar to hose connector should be used to seal the hose connector plate to hoseconnector.NOTE13Six14-20 UNC-2B hex nuts or wing nuts should be used to fasten hose connector to hose connector plate.NOTE14Thirty-six14-20 UNC-2A screws should be used to fasten either the cleaner plate or hose connector flange plate.NOTE15Alternative materials,t