1、Designation:F232413An American National StandardStandard Test Method forPrerinse Spray Valves1This standard is issued under the fixed designation F2324;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numbe
2、r in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the water consumption flow rateand spray force of prerinse spray valves.The food serviceoperator can use this evaluation
3、 to select a prerinse spray valveand understand its water consumption and spray force.1.2 The following procedures are included in this testmethod:1.2.1 Water consumption(see 10.2).1.2.2 Spray force test(see 10.3).1.3 The values stated in inch-pound units are to be regardedas standard.The values giv
4、en in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This test method may involve hazardous materials,operations,and equipment.It does not address all of thepotential safety problems associated with its use.It is therespo
5、nsibility of the users of this test method to establishappropriate safety and health practices and determine theapplicability of regulatory limitations prior to its use.2.Referenced Documents2.1 NSF Documents:2NSF Listings Food Equipment and Related Products,Com-ponents and Materials,NSF Internation
6、al2.2 ASME Standard:3ASME A112.18.1/CSA B125.1 Plumbing Supply Fittings3.Terminology3.1 Definitions:3.1.1 prerinse spray valvea handheld device containing arelease to close mechanism that is used to spray water ondishes,flatware,etc.3.1.2 spray forcethe amount of force exerted onto thespray disc.3.1
7、.3 testmethodadefinitiveprocedurefortheidentification,measurement,and evaluation of one or morequalities,characteristics,or properties of a material,product,system,or service that produces a test result.3.1.4 uncertaintymeasure of systematic and precision er-rors in specified instrumentation or meas
8、ure of repeatability ofa reported test result.3.2 Abbreviations:3.2.1 gpmgallons per minute.4.Summary of Test Method4.1 The flow rate of the prerinse spray valve is measured ata water pressure of 60 6 2 psi(413.7 6 13.8 kPa)and 60 610F(15.6 6 2.6C)to verify that the prerinse spray valve isoperating
9、at the manufacturers rated flow rate.If the measuredflow rate is not within 5%of the rated flow rate,all furthertesting ceases and the manufacturer is contacted.The manu-facturer may make appropriate changes or adjustments to theprerinse spray valve.4.2 The amount of force exerted by the prerinse sp
10、ray valveis determined by the spray force test.5.Significance and Use5.1 The flow rate test is used to confirm that the prerinsespray valve is operating at the manufacturers rated flow rate atthe specified water pressure.The result from this test wouldalso assist the operator in controlling the wate
11、r and sewerconsumption and reduce water heating bills.5.2 The spray force is a measure of the impact from aprerinse spray valve on the target surface and can be used toselect a model that meets an end-users force profile.5.3 Flow rate and spray force can be used along with spraypattern,coverage area
12、,usage time,and flow control to select aprerinse spray valve that meets an end-users performancerequirements.6.Apparatus6.1 Analytical Balance Scale,or equivalent,for measuringthe weight of the water carboy.It shall have a resolution of 0.01lb(5 g)and an uncertainty of 0.01 lb(5 g).1This test method
13、 is under the jurisdiction of ASTM Committee F26 on FoodService Equipment and is the direct responsibility of Subcommittee F26.06 onProductivity and Energy Protocol.Current edition approved June 1,2013.Published July 2013.Originally approvedin 2003.Last previous edition approved in 2009 as F2324 03(
14、2009).DOI:10.1520/F2324-13.2Available from NSF International,P.O.Box 130140,789 N.Dixboro Rd.,AnnArbor,MI 48113-0140.3Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three Park Ave.,New York,NY 10016-5990,http:/www.asme.org.Copyright ASTM International,10
15、0 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2 Calibrated Exposed Junction Thermocouple Probes,with a range from 50 to 200F(10 to 93.3C),with a resolutionof 0.2F(0.1C)and an uncertainty of 1.0F(0.5C),formeasuring water line temperatures.Calibrated K-type 24-GAther
16、mocouple wire with stainless steel sheath and ceramicinsulation is the recommended choice for measuring the waterline temperatures.The thermocouple probe can be fed througha compression fitting so as to submerse exposed junction in thewater lines.6.3 Carboy,or equivalent container,for measuring theweight of the water during the flow rate test.A 5-gal(19-L)carboy water bottle has been found to be suitable(the carboyis the standard water bottle that is used for water coolers).NOTE1The 5-gal(19-L)c
