IS 14605: Irrigation equipment - Micro sprayer

15 Pages·1998·1.6 MB·English

by  Bureau of Indian Standards

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timely dissemination of this information in an accurate manner to the public.
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“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””ै”
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“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