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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 14605 (1998): Irrigation equipment - Micro sprayer [FAD 17: Farm Irrigation and Drainage Systems] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 14605: 1998 Indian Standard IRRIGATION EQUIPMENT - MICRO SPRAYERS - SPECIFICATION ICS 65.060.35 @BIS 1998 BUREAU OF IN'DIAN STANDARDS MANAK BHAVAN,9 BA HADUR SHAH ZAFAR MARG NEW DELHI 110002 September 1998 Price Group 4 AMENDMENT NO. 1 SEPTEMBER 1000 TO IS 14605: 1998 IRRIGATION EQUIPMENT-MICRO SPRAYERS - SPECIFICATION , . (P~8C4,cltlllSC7.1)- InsertthefollowiagIttheeDcl: "HO\ftYer,tbRideciconnectionswith metalto pluticorplutieto metafconlad . shan witbatancl • torque of 4 N:.m, when.pplied Cor 1 bwitboat sbowingIny sipof-claDllge.' (FADS4) ..,....,..,UIIlI,819,NewDelW,IDdia IrrigationandFarmDrainageEquipmentand SystemSectionalCommittee,FAD54 FOREWORD This Indian Standard was adopted by the BureauofIndianStandards,afterthe draftfinalized by the Irrigation andFarmDrainageEquipmentand SystemSectionalCommitteehadbeenapprovedbytheFoodandAgriculture DivisionCouncil. Micro sprayers are now increasingly used for irrigation purpose. A need was therefore felt to prepare a specificationfor microsprayerfor producingquality productbythe manufacturerand for selectingappropriate microsprayers by the user. In the preparationofthis standardconsiderableassistancehas beenderivedfrom ISO8026: 1995 'Agricultural irrigation equipment- Sprayers- General requirements and test methods', published by the International Organizationfor Standardization. This standarddeviatesfrom ISO8026: 1995on the following points: a) Temperaturefor various tests has beenchangedfrom 2SoC±SoCto27°C±2°C. b) Minimum torque for testing the resistanceofthreadedconnectionshas been reduced from 7N-mto 4 N-m as committeefelt that 7N-misdifficulttoachievefor plastic materialsavailable in the country. c) Test ofresistance to hydrostatic pressure at high temperature and that for trajectory height has been excludeddueto problemsin testing. Forthe purposeofdeciding whetheraparticularrequirementofthis standard iscomplied with the final value, observed or calculated. expressing the result of atest or analysis, shall be roundedoffinaccordance with IS 2 : 1960 'Rulesfor roundingofnumerical values(revised)'. Thenumberofsignificantplacesretained inthe roundedoff valueshouldbethesameasthatofthe specifiedvalueinthis standard. IS 14605: 1998 Indian Standard IRRIGATION EQUIPMENT - MICRO SPRAYERS - SPECIFICATION 1 SCOPE sprayerorfitted separately withinthe limitsspecified bythe manufactureras the regulatingrange (see3.5). 1.1 This standard specifies the general requirements and test methodsfor microsprayers. 3.3 Non-regulatedSprayer.Non-pressure CompensatingSprayer 1.1.1 It applies to sprayers intended for assembly in pipelinenetworksforirrigationandforoperationwith Sprayer with a variable flow rate at varying water irrigat-enwater. pressuresatthesprayerinlet. 2 REFERENCES 3.4 NominalFlowRate The following Indian Standards contain provisions Quantity of water discharged by a sprayer with a which: through reference in this text, constitute specified nozzle per unit of time at ambient provisions of this Indian Standard. At the time of temperature at the test pressure declared by the publication, the editions indicated were valid. All manufacturerinthe manufacturer'sdata sheets. standards are subject to revision, and parties to agreements based on this Indian Standard are 3.5 RegulatingRange encouraged to investigate the possibility. ofapplying Range ofpressure at the inlet ofa regulated sprayer the most recent editions of the standards indicated within which the sprayer is designed to operate and below: discharge within 5 percent of its nominal flow rate ISNo. Title (see3.4). 554: 1985 Dimensionsfor pipe threads where 3.6 TestPressure(p) pressure-tightjointsarerequiredon the threads(third revision) a) 200 kPa at the sprayerinlet. 2500 Samplinginspectionprocedures: b) Any pressure at the sprayer inlet, specifically declared by the manufacturer to bea test (Part 1):1992 Attributes sampling plans indexed pressure. by acceptable quality level (AQL) for lot-by-lot inspection (second 3.7 MinimumWorkingPressure(PMi,,) revision) (Part 2) : 1965 Inspection by variables for percent Lowest working pressure declared by the defective manufacturermeasurednearthe baseofthesprayerat apointsituatedabout0.2 mbelowthemain nozzleof 12232 Irrigation equipment - Rotating thesprayerbut with thepressuregaugesituatedinthe (Part2)':1995 sprinkler: Part 2 Test method for same planeas the main nozzle (seeFig. 1). uniformity of distribution (first revision) 3.8 Maximum WorkingPressure(PMax) 3 DEFINITIONS Highest working pressure declared by the For the purpose of this standard, the following manufacturermeasurednear thebaseofthesprayerat definitionsshallapply. apoint situatedabout0.2 mbelow the main nozzleof 3.1 IrrigationSprayer the sprayerbut withthepressuregaugesituatedinthe same planeasthemain nozzle (seeFig. I). Device which sprayswaterwith or withoutrotational movementofthesprayerparts,intheformoffinejets 3.9 RanleofWorkingPressure or inafan shape. Pressure range between the minimum working 3.2 Regulated Sprayer, Pressure-Compensated pressure, PMln and the maximum working pressure, Sprayer PMaxdeclared by the manufacturer as the pressure Sprayerwitharelativelyconstantflowrateatvarying rangein whichthe sprayer operates effectively (see Fig.2). water pressures at the sprayer inlet in-built with the IS 14605: 1998 3.10 AmbientTemperature NOTE - The respective valuesrelate only to sprayers in continuousoperation, Temperatureofthesurroundings. or 3.14 Diameter Coverale 3.11 SprayCoveragePattern Twicetheradiusofthrow(see3.13). Areawettedbythesprayeranddescribedbygeometric oranangularpart-circlepattern. 3.15 WaterOutletHeight NOTE- Thismaybe, forexample, rectanplar, fulJ-etrc1e, Heightabovegroundlevelofthewateroutletfromthe 360°pattern,half-circle,1800pattern;twocircularsectors,such sprayerwhenthesprayerisinstalledasindicatedinthe asthexusre.ctorbetween0° and9(j'andthesectorbetween180° manufacturer'sinstructions. and andsttiptypewettin.spraysarealIoavailable, 3.16 Nozzle 3.12 WaterDistributionCurve Apertureofthesprayerthroughwhichthewaterspray Curveofapplicationrates measuredincollectorslaid is'discharged. out along the wetted radius, as a function of the distancesofthecollectorsfromthesprayer. 3.17·CoUector 3.13 RadiusofThrow Receptacle intowhich the water discharged by the sprayer is deposited during the test for spray Farthestdistancemeasuredfromthesprayercenterline distribution. tothepointatwhichthesprayerdepositswateratthe minimum rate of 0.205 mmIh for a 'sprayer whose 3.18 IrrigationLateral dischargeexceeds75lIh,and0,13mmIhforasprayer Branch supply line on which water distribution whose discharge is equal to or less than 7S l/h, devices (sprayers, emitters, drippers) are mounted typicallymeasuredatanyarcofcoverageexceptatthe directlyorbymeansofasuitablefitting,rise--..tube., arcextremesforpart-circlesprayers. ~AlN NOZZLE TESTED SPRAYER o o N ~ SUPPLY PIPE Alldimensionsinmillimctres. Flo. 1 MBASURBMENTOPSPRAYERPRESSURE ~~ .. RA_N_G_EtOF~E~FFE~CTI~VE~PRE~SS~URE~~~~~~ssu~ P PU u TEST PRESSURE FIG.2 RANG EOPBPPECTlVEPRESSURE 2 IS14605:1998 .. CLASSMCAnON aplasticspartfor connectiontorisersmay haveother configurations (projections, slots, etc) to facilitate Sprayersareclassifiedintwo wa)Cstsee4.1 and4.2). manual assemblyandremoval. 4.1 Performance Characteristics (Flow Rate In 5.3 ThreadedConnections RelationtoPressure) For sprayers designed for threaded connection to 4.1.1 RegulatedSprayers pipelines,thescrewthreads shallcomply withIS554. 4.1.2 Non-regulatedSprayers Alternatively,other threads maybeallowedprovided that a suitable adapter shall be supplied with each 4.2 SprayCharacteristics threaded connection,making itcomply withIS554. 4.2.1 Relativelyuniformspraycoveragepattern inall 6 GENERALTESTCONDmONS directions as, for example, the pattern of some full-circle 360° sprayers with a fan-shape coverage 6.1 General pattern. Unless otherwise noted, perform the tests with water 4.2.2 Non-uniform spray coverage pattern, as, for atatemperatureof27±2°C. example,thatobtainedfrom finejetsprayers. 6.1 Sampling andAceeptauee Requirements 5 GENERAL REQUIREMENTS 6.2.1 Type Tests 5.1 Materials Take thetestspecimensatrandom fromaquantity of Sprayers shall be made ofmetals or plastics. Metal at least 500 sprayers. The number of test specimens sprayers shallbemadefromstainlesssteeloralloysof required foreach testshall be asspecifiedinTable 1. copper, aluminiumand zinc. Ifthe number ofdefectivespecimensinthesampleis Plasticspartsofthesprayers whichconductwaterand equal toorless than theacceptance number specified which are exposed to sunlight shall be opaque. in Table 1, the sample shall be considered as Plastics parts ofsprayersexposedtoultraviolet(UV) complying with the requirements of this Indian radiation shall contain an additive resistant to UV Standard. Ifthenumber ofdefectivespecimensinthe radiation. sample is greater than the acceptance number, the sample shallbeconsideredasnotcomplyingwiththe On request, the manufacturer shall provide requirementsofthisIndian Standard. information as to the resistance of the sprayer to chemicalsused inagriculture. 6.2.2 AcceptanceTests 5.2 ConstructionandWorkmanship When acceptanceofmanufacturing lotsor shipments isrequired, perform the sampling inaccordance with 5.1.1 Individual parts of a sprayer shall show no IS 2500 (Part 1), based on acceptable quality level visiblecracks, holes, air bubbles orother defects that (AQL),2.5andspecial inspection level 5-4. may impair the performance and durability of the sprayer, itsoperationandsuitabilityforinstallation. Test all test specimens in the .sarnpie, selected at random as provided for in Table II AofIS 2500 The surfacesofthe sprayershall be smooth and free (Part 1.)asspecified in8.2. fromprojectionsorsharp edges that maycause injury orpooroperation. Theshipmentormanufacturinglotcomplieswiththis Indian Standardifthe numberofdefectivespecimens 5.2.2 If the construction of the sprayer permits found..in the test does not exceed the acceptance replacement or change of parts (for example, the number specified inIS2500 (Part 1). nozzle), it shall be possible to replace the parts with standard tools; if'special tools are required, the Fortheother tests,select the test specimenatrandom manufacturershall becapableofsupplyingthem. toconform withthe number specifiedinTable I. 5.2.3 Thedesign andmanufactureofthesprayershall," The shipment or manufacturing lot is considered to enableproperoperationofthesprayerwhen installed comply with this Indian Standard if the number of and operated in accordance with the manufacturer's defective specimens found inthe other tests does not instructions. exceed the acceptance number specified inTable 1. 5.2.4 Metal sprayers intended for threaded It is not necessary to Perform the tests in 8.4 and 9 connection(see6.3) toapipelineor to risers shall be within the framework ofthe acceptance tests iftype equipped with a hexagon, two parallel surfaces, or test has been carried out for the same sprayer model some otherconfigurationsuitableforgripping with a andprovidedthatthemanufacturerhasnotintroduced standardopen or adjustablewrench. Sprayersha ving structural changesinthesprayersincethetype test. 3 IS144i05:1998 Table1 RequiredNumber01TestSpedmeas 7.2.2 Thesprayerand itspartsshallwithstandthetest andAcceptanceNumber pressure without being damaged, no leakage shall (Clauses 6.2.1 and6.2.2) occurthroughthe sprayerbodyoritsconnectionsand thesprayershallDotseparatefromtheassembly. 81 Name01Test ClluleNo.~ AeaptaDce No. No. Tilt No. 8 FUNCTIONALANDOPERATIONALTESTS Sped..... (1) (2) (3) (4) (5) 8.1 General TestCondItioas i) Constructionandworlcmlnsbip 5.2 10 1 ii) R~of"""connccdonl7.1 10 I 8.1.1 Perform the tests on sprayers which have iii) Resistancetohydrostaticpressure7.2 5 o previously been examined visually (without atambienttemperature iv) Uniformityofflowrate 8.2 I) I) disassembly) for satisfactory workmanship and v) PerformancecIwacteriatics 8.3 S 2) quality. vi) Waterdistributioncurves 8.4.2 3 2) vii) Diameterofcoverage 8.4.3 3 2) Attachtestsprayerstothe supplylineaccordingtothe viii)Spraycoveragepattern 8.4.4 3 2) recommendations of the manufacturer for field ix) Durability 9 S 1 assembly. J) Number of test specimens and acceptance conditions in accordancewidtIS2500(Put2). Test sprayers of the same type, but with different 2)Acceptance~nditiOlllasspecifiedintherelevantclause. nozzlesordifferentmeansofattachmentseparatelyfor each combinationofsprayer and nozzle,on sprayer andmeansofattachment. The manufacturershall give proof that no changes havebeenmade in theproductto obviatetheneedto Prior to conducting the functional and operational performtypetests. tests, operate each test sprayer for 1 h at the test pnessure. . 6.3 Accuracy01MeasuringDevices 8.1.2 The test liquid shall be water that has passed The allowable deviation of the measuring devices through a filter with a meshas recommended by the fromtheirtruevaluesshallbeas follows: manufacturer for normal field conditions; in the Pressure: ±2percent absence of such recommendations, the water used Flowrate: ± 1percent shall be passed through a filter with apertures of O.4mm. 7 STRENGTHTESTS Test sprayers while attached to an irrigation lateral, Unlessotherwisenoted, testsshall be performedwith testsprayersofthesametype,butwithdifferentmeans waterat ambienttemperature. of attachment, separately for each combination for 8.2 UniformityofFlowRate sprayerandmeansofattachmentasrecommendedby the manufacturerforsuitableconnection. 8.2.1 Measuretheflowrateofatest sprayeratthetest pressure. 7.1 TestofResistanceofThreadedConnections 8.2.2 The sprayers tested shall meet the sample Forsprayers made ofmetal, the threadedconnection requirements of IS 2500 (Part 2) for an acceptable shall withstand a torqueof 20N-m withoutshowing lowerqualitylevel(AQL)of2.5percentandshallhave signsofdamage. For sprayersmade ofplastics, the upperandlowerspecificationlimitsas follows: threaded parts shall withstand a torque of 4 N-m, a) 10percentforregulatedsprayers(see 4.1.1). appliedfor I h, withoutshowingsignsofdamage. b) 7 percent for non-regulated sprayers (se~~ 7.2 Test 01Reslstanee to Hydrostatic Pressure at 4.1.2). AmbientTemperature 8.3 PerformanceCbaracterlstlc:s 7.2.1 Connectthesprayerto thetestrig according to the recommendation of the manufacturer for field 8.3.1 General assembly and plug the nozzle such that no leakage Arrangethe sprayerstestedin8.2 inascendingorder occursat theconnectionduringthe test. according to their measured flow rate, and number Checkthatnoairremainsinthesystem,thengradually them from I to n, with I being the number of the increase the water pressure in stages of 100 kPa, sprayerwiththe lowestflow rateandn that withthe holding the system pressure for 5 seconds at each hiaJ1estflowrate. pressurestage. Select the four sprayers with numbers 2; (n12)-1: Increasethe waterpressuregraduallyfromzeroupto (nI2)+ 1;and n- 1forfurthertesting. 1.2times the maximumworkingpressure,PMax and NOTE- Ifn-isanoddnumber. round(nI2) dowDw"toa maintainthe pressureforaperiodof 1h. wholenumber. 4