SIST ISO 8026:2015
Agricultural irrigation equipment - Sprayers - General requirements and test methods
Agricultural irrigation equipment - Sprayers - General requirements and test methods
This International Standard specifies the general requirements and test methods for irrigation sprayers.
It is applicable to sprayers intended for installation on a pipe lateral and for operation with irrigation water.
Matériel agricole d'irrigation - Diffuseurs - Exigences générales et méthodes d'essai
Oprema za namakanje kmetijskih površin - Razpršilniki - Splošne zahteve in preskusne metode
Ta mednarodni standard določa splošne zahteve in preskusne metode za razpršilnike za namakanje. Velja za razpršilnike, namenjene namestitvi na stranski del cevi in uporabi z vodo za namakanje.
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INTERNATIONAL ISO
STANDARD 8026
Third edition
2009-12-15
Agricultural irrigation equipment —
Sprayers — General requirements and
test methods
Matériel agricole d'irrigation — Diffuseurs — Exigences générales et
méthodes d'essai
Reference number
ISO 8026:2009(E)
©
ISO 2009
---------------------- Page: 1 ----------------------
ISO 8026:2009(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2009 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 8026:2009(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Classification .3
4.1 Classification according to uniformity of coverage .3
4.2 Classification according to water-spray characteristic(s) .3
4.3 Classification according to performance characteristics (flow rate regulation) .4
4.4 Classification according to type of connection .4
4.5 Classification according to additional functions .4
5 General requirements .4
5.1 Materials .4
5.2 Manufacture and assembly .4
5.3 Connections.4
6 Test methods .5
6.1 Measurements .5
6.2 General test conditions.5
6.3 Hydraulic tests.6
6.4 Durability test.16
6.5 Mechanical test.16
7 Identification and marking.17
8 Data to be supplied by the manufacturer.17
© ISO 2009 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 8026:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 8026 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
This third edition cancels and replaces the second edition (ISO 8026:1995), which has been technically
revised. It also incorporates the Amendment ISO 8026:1995/Amd.1:2000.
iv © ISO 2009 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 8026:2009(E)
Agricultural irrigation equipment — Sprayers — General
requirements and test methods
1 Scope
This International Standard specifies the general requirements and test methods for irrigation sprayers.
It is applicable to sprayers intended for installation on a pipe lateral and for operation with irrigation water.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 15886-3:2004, Agricultural irrigation equipment — Sprinklers — Part 3: Characterization of distribution
and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
ambient temperature
temperature of the air surrounding a sprayer
3.2
collector
receptacle into which water is deposited during a water distribution test, a diameter of coverage test or a spray
coverage pattern
3.3
diameter of coverage
distance between the most remote points at which a continuously operating sprayer deposits water at an
effective application rate, measured along a straight line through the sprayer, equal numerically to twice the
radius of throw
3.4
effective application rate
application rate greater than or equal to 0,26 mm/h for sprayers with flow rates exceeding 75 l/h and
0,13 mm/h for sprayers with flow rates equal to or less than 75 l/h
© ISO 2009 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 8026:2009(E)
3.5
irrigation lateral
branch supply line in an irrigation system on which water distribution devices, such as sprayers, are mounted
directly or by means of fittings, risers or tubes
3.6
irrigation sprayer
device that discharges water in the form of fine jets or in a fan shape without rotational movement of its parts
3.7
maximum working pressure
highest pressure immediately upstream from a sprayer, as specified by this International Standard or the
manufacturer, to ensure continuous operation and functionality specific to the device
3.8
minimum working pressure
lowest pressure immediately upstream from a sprayer, as specified by this International Standard or the
manufacturer, to ensure continuous operation and functionality specific to the device
3.9
nominal flow rate
volume of water discharged per unit of time from a sprayer under test pressure
3.10
non-regulated sprayer
non-pressure-compensating sprayer
sprayer with a variable flow rate at varying water pressures at the sprayer inlet
3.11
nozzle
aperture or adjutage of the sprayer through which water is discharged
3.12
pop-up sprayer
irrigation sprayer designed for installation such that the sprayer nozzle is below ground level when it is not
pressurized and above ground when it is pressurized
3.13
radius of throw
wetted radius
distance measured from a continuously operating sprayer to the most remote point at which the sprayer
deposits water at a minimum rate of 0,26 mm/h for a sprayer with a discharge exceeding 75 l/h and at a
minimum rate of 0,13 mm/h, for a sprayer with a discharge equal to or less than 75 l/h, measured at any arc of
coverage, except near the arc extremes for part-circle sprayers
3.14
range of regulation
all of the working pressures at the inlet of a regulated sprayer within which the sprayer is declared by the
manufacturer to regulate flow within a specified accuracy
3.15
range of working pressures
all of the working pressures between the minimum working pressure and the maximum working pressure
3.16
regulated sprayer
sprayer that maintains a relatively constant flow rate at varying water pressures at the sprayer inlet within the
limits specified by the manufacturer
2 © ISO 2009 – All rights reserved
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ISO 8026:2009(E)
3.17
spray coverage pattern
area wetted by the sprayer, which operates according to the conditions specified by the manufacturer
3.18
test pressure
pressure at the inlet of a sprayer declared by the manufacturer as the pressure to be used for test purposes
NOTE In the absence of such a declaration, 200 kPa is used.
3.19
trajectory angle
angle above the horizontal plane of the water spray discharged from a sprayer nozzle operating at test
pressure
3.20
trajectory height
maximum height above a sprayer of the trajectory of the water spray discharged from the sprayer nozzle
operating at test pressure
3.21
water distribution curve
distribution curve
graphical plot of water application depth as a function of distance from a sprayer along a specified radius
3.22
water outlet height
height above ground level of the water outlet of a sprayer when the sprayer is installed as specified by the
manufacturer
4 Classification
4.1 Classification according to uniformity of coverage
4.1.1 Uniform spray coverage pattern
4.1.2 Non-uniform spray coverage pattern
4.2 Classification according to water-spray characteristic(s)
4.2.1 Area of coverage
4.2.1.1 Circular
4.2.1.1.1 Full-circle
4.2.1.1.2 Part-circle
4.2.1.1.2.1 Fixed-pattern
4.2.1.1.2.2 Adjustable pattern
4.2.1.2 Non-circular (polygonal, rounded non-circular)
4.2.2 Type of spray
4.2.2.1 Sheet spray
4.2.2.2 Jet spray
© ISO 2009 – All rights reserved 3
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ISO 8026:2009(E)
4.3 Classification according to performance characteristics (flow rate regulation)
4.3.1 Regulated sprayers
4.3.2 Non-regulated sprayers
4.4 Classification according to type of connection
4.4.1 Threaded
4.4.2 Insert barb
4.4.3 Bayonet
4.4.4 Other
4.5 Classification according to additional functions
4.5.1 Pop-up/fixed
4.5.2 Valve in head
5 General requirements
5.1 Materials
The plastics parts of the sprayers, which conduct water and which are exposed to sunlight, shall be opaque
and shall contain an additive to protect against UV radiation.
Sprayers may be made from a copper alloy or from other materials, whose mechanical properties and
resistance to corrosion when used with irrigation water are similar to those of copper alloys.
On request, the manufacturer shall provide information about the resistance of the sprayer to chemicals used
in agriculture.
5.2 Manufacture and assembly
The sprayers shall have no manufacturing defects which might be detrimental to their operation.
The sprayers shall incorporate features for easy fitting and assembly. All sprayers equipped with removable
parts shall be easy to assemble manually or by using common tools. Should any special tool be required, the
manufacturer shall be able to furnish them on request. The removable parts of one sprayer shall be
interchangeable with those of other units of the same make and type.
5.3 Connections
The sprayer connections shall be specified according to the connection type and the corresponding
International Standard.
5.3.1 Threaded connection
For sprayers designed for threaded connection to irrigation laterals, the screw threads shall comply with
ISO 7-1. Alternatively, other threads may be allowed provided that a suitable adaptor is supplied with each
threaded connection, making it comply with ISO 7-1.
4 © ISO 2009 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 8026:2009(E)
5.3.2 On line connection
The manufacturer shall specify the type and size of flexible tube for which the connections are suitable.
All complementary information shall be supplied by the manufacturer.
6 Test methods
6.1 Measurements
The accuracy required for all measurements not specifically addressed in this International Standard shall be
± 3 %.
Application depths within collectors shall be measured to an accuracy of ± 1 %.
The test pressure shall not vary by more than ± 2 % during the test period. The pressure shall be measured to
an accuracy of ± 1 %.
The flow rate through the sprayer shall be measured to an accuracy of ± 1 %.
The temperature shall be measured to an accuracy of ± 0,5 °C. For indoor testing, the water temperature shall
be (23 ± 3) °C.
Time shall be measured with stopwatches accurate to ± 0,1 s.
6.2 General test conditions
Perform the test on sprayers which have previously been examined visually (without disassembly) for
satisfactory workmanship and quality.
Attach test sprayers to the supply line according to the field assembly recommendations of the manufacturer.
Maintain the sprayer within ± 2° of vertical.
There shall be no visually detectable external leakage during the test.
Sprayers of the same type, but with different nozzles or different means of attachment, shall be tested
separately for each combination of sprayer and nozzle or sprayer and means of attachment.
Collectors shall be designed in accordance with ISO 15886-3:2004, 4.1, and shall incorporate the following
features.
a) They shall be identical.
b) The vertical dimension of each collector shall be at least twice the maximum depth of the water collected
during the test, but not less than 150 mm.
c) The circular opening with sharp edges shall be free of deformities.
d) The diameter shall be from one half to one times the height, but shall not be less than 85 mm.
The opening of all collectors shall be in a common horizontal plane, with a slope not exceeding 2 % in any
direction.
Sprayer nozzle height above the openings of the collectors shall be 0,20 m or at a height as specified by the
manufacturer.
© ISO 2009 – All rights reserved 5
---------------------- Page: 9 ----------------------
ISO 8026:2009(E)
6.3 Hydraulic tests
Perform the tests indoors, in drift-free conditions or in an outdoor area under no wind conditions (maximum
allowable wind speed less than 0,5 m/s).
Relative humidity and ambient temperature shall be measured at the start, midpoint and end of the test. For
indoor testing, changes in temperature and humidity during the test shall not exceed ± 5 % of the pre-test
ambient.
In order to take evaporation into account, put three control collectors into the test area, but outside the sprayer
range. Place the target depth of water in each collector just prior to the start of the test. At the conclusion of
the test, measure the final water depth and compute the evaporation by subtracting the final from the initial
water depth and averaging the three results.
Prior to conducting the functional and operational tests, operate each test sprayer for 1 h at test pressure, in
order to establish stable conditions.
6.3.1 Hydraulic test to be performed for each type of sprayer
The minimum tests to be performed for each type of sprayer are shown in Table 1.
Table 1 — Hydraulic tests
Hydraulic test
Flow rate
Spray Water as a
Sprayer type
Diameter of Uniformity Trajectory
coverage distribution function
coverage of flow rate height
pattern curve of inlet
pressure
Uniform spray coverage pattern 6.3.2 6.3.3 6.3.4
6.3.5 6.3.6 6.3.7
plus full circle Method 2 Method 1 Method 2
Uniform spray coverage pattern 6.3.2 6.3.3 6.3.4
6.3.5 6.3.6 6.3.7
plus part-circle Method 1 Method 1 Method 1
Non-uniform spray coverage 6.3.2 6.3.3 6.3.4
6.3.5 6.3.6 6.3.7
pattern plus full circle Method 1 Method 2 Method 1
6.3.2 6.3.4
6.3.3
Non-circular/part-circle 6.3.5 6.3.6 6.3.7
a a
Method 2
Method 1 Method 1
Other — — — 6.3.5 6.3.6 —
a
The diameter of coverage and the water distribution curve shall be calculated using the spray coverage pattern.
6.3.2 Diameter of coverage
The test specimen to perform this test shall be taken at random from the test sample used to determine the
uniformity of flow rate and the flow rate as a function of inlet pressure.
6.3.2.1 Method 1
The collectors shall be placed on a level surface along 8 radii which are determined by lines extending from
the sprayer at 45° angles. In the radii, the collectors shall be spaced at 0,25 m for sprayers with a diameter of
coverage of up to 6 m, or 0,5 m for sprayers with a diameter of coverage greater than 6 m. The end of each
line shall extend beyond the surface sprayed.
The sprayer shall be placed at the centre of these radii (see Figure 1).
6 © ISO 2009 – All rights reserved
---------------------- Page: 10 ----------------------
ISO 8026:2009(E)
Key
1 collector
2 test sprayer
a
Collectors spaced at 0,25 m or 0,5 m.
Figure 1 — Diameter of coverage test using Method 1
Operate the sprayer for a minimum period of 1 h at the test pressure as measured at the inlet of the sprayer.
The test duration shall be lo
...
SLOVENSKI STANDARD
SIST ISO 8026:2015
01-april-2015
1DGRPHãþD
SIST ISO 8026:1999
Oprema za namakanje kmetijskih površin - Razpršilniki - Splošne zahteve in
preskusne metode
Agricultural irrigation equipment - Sprayers - General requirements and test methods
Matériel agricole d'irrigation - Diffuseurs - Exigences générales et méthodes d'essai
Ta slovenski standard je istoveten z: ISO 8026:2009
ICS:
65.060.35 Namakalna in drenažna Irrigation and drainage
oprema equipment
SIST ISO 8026:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 8026:2015
---------------------- Page: 2 ----------------------
SIST ISO 8026:2015
INTERNATIONAL ISO
STANDARD 8026
Third edition
2009-12-15
Agricultural irrigation equipment —
Sprayers — General requirements and
test methods
Matériel agricole d'irrigation — Diffuseurs — Exigences générales et
méthodes d'essai
Reference number
ISO 8026:2009(E)
©
ISO 2009
---------------------- Page: 3 ----------------------
SIST ISO 8026:2015
ISO 8026:2009(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2009 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 8026:2015
ISO 8026:2009(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Classification .3
4.1 Classification according to uniformity of coverage .3
4.2 Classification according to water-spray characteristic(s) .3
4.3 Classification according to performance characteristics (flow rate regulation) .4
4.4 Classification according to type of connection .4
4.5 Classification according to additional functions .4
5 General requirements .4
5.1 Materials .4
5.2 Manufacture and assembly .4
5.3 Connections.4
6 Test methods .5
6.1 Measurements .5
6.2 General test conditions.5
6.3 Hydraulic tests.6
6.4 Durability test.16
6.5 Mechanical test.16
7 Identification and marking.17
8 Data to be supplied by the manufacturer.17
© ISO 2009 – All rights reserved iii
---------------------- Page: 5 ----------------------
SIST ISO 8026:2015
ISO 8026:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 8026 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
This third edition cancels and replaces the second edition (ISO 8026:1995), which has been technically
revised. It also incorporates the Amendment ISO 8026:1995/Amd.1:2000.
iv © ISO 2009 – All rights reserved
---------------------- Page: 6 ----------------------
SIST ISO 8026:2015
INTERNATIONAL STANDARD ISO 8026:2009(E)
Agricultural irrigation equipment — Sprayers — General
requirements and test methods
1 Scope
This International Standard specifies the general requirements and test methods for irrigation sprayers.
It is applicable to sprayers intended for installation on a pipe lateral and for operation with irrigation water.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 15886-3:2004, Agricultural irrigation equipment — Sprinklers — Part 3: Characterization of distribution
and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
ambient temperature
temperature of the air surrounding a sprayer
3.2
collector
receptacle into which water is deposited during a water distribution test, a diameter of coverage test or a spray
coverage pattern
3.3
diameter of coverage
distance between the most remote points at which a continuously operating sprayer deposits water at an
effective application rate, measured along a straight line through the sprayer, equal numerically to twice the
radius of throw
3.4
effective application rate
application rate greater than or equal to 0,26 mm/h for sprayers with flow rates exceeding 75 l/h and
0,13 mm/h for sprayers with flow rates equal to or less than 75 l/h
© ISO 2009 – All rights reserved 1
---------------------- Page: 7 ----------------------
SIST ISO 8026:2015
ISO 8026:2009(E)
3.5
irrigation lateral
branch supply line in an irrigation system on which water distribution devices, such as sprayers, are mounted
directly or by means of fittings, risers or tubes
3.6
irrigation sprayer
device that discharges water in the form of fine jets or in a fan shape without rotational movement of its parts
3.7
maximum working pressure
highest pressure immediately upstream from a sprayer, as specified by this International Standard or the
manufacturer, to ensure continuous operation and functionality specific to the device
3.8
minimum working pressure
lowest pressure immediately upstream from a sprayer, as specified by this International Standard or the
manufacturer, to ensure continuous operation and functionality specific to the device
3.9
nominal flow rate
volume of water discharged per unit of time from a sprayer under test pressure
3.10
non-regulated sprayer
non-pressure-compensating sprayer
sprayer with a variable flow rate at varying water pressures at the sprayer inlet
3.11
nozzle
aperture or adjutage of the sprayer through which water is discharged
3.12
pop-up sprayer
irrigation sprayer designed for installation such that the sprayer nozzle is below ground level when it is not
pressurized and above ground when it is pressurized
3.13
radius of throw
wetted radius
distance measured from a continuously operating sprayer to the most remote point at which the sprayer
deposits water at a minimum rate of 0,26 mm/h for a sprayer with a discharge exceeding 75 l/h and at a
minimum rate of 0,13 mm/h, for a sprayer with a discharge equal to or less than 75 l/h, measured at any arc of
coverage, except near the arc extremes for part-circle sprayers
3.14
range of regulation
all of the working pressures at the inlet of a regulated sprayer within which the sprayer is declared by the
manufacturer to regulate flow within a specified accuracy
3.15
range of working pressures
all of the working pressures between the minimum working pressure and the maximum working pressure
3.16
regulated sprayer
sprayer that maintains a relatively constant flow rate at varying water pressures at the sprayer inlet within the
limits specified by the manufacturer
2 © ISO 2009 – All rights reserved
---------------------- Page: 8 ----------------------
SIST ISO 8026:2015
ISO 8026:2009(E)
3.17
spray coverage pattern
area wetted by the sprayer, which operates according to the conditions specified by the manufacturer
3.18
test pressure
pressure at the inlet of a sprayer declared by the manufacturer as the pressure to be used for test purposes
NOTE In the absence of such a declaration, 200 kPa is used.
3.19
trajectory angle
angle above the horizontal plane of the water spray discharged from a sprayer nozzle operating at test
pressure
3.20
trajectory height
maximum height above a sprayer of the trajectory of the water spray discharged from the sprayer nozzle
operating at test pressure
3.21
water distribution curve
distribution curve
graphical plot of water application depth as a function of distance from a sprayer along a specified radius
3.22
water outlet height
height above ground level of the water outlet of a sprayer when the sprayer is installed as specified by the
manufacturer
4 Classification
4.1 Classification according to uniformity of coverage
4.1.1 Uniform spray coverage pattern
4.1.2 Non-uniform spray coverage pattern
4.2 Classification according to water-spray characteristic(s)
4.2.1 Area of coverage
4.2.1.1 Circular
4.2.1.1.1 Full-circle
4.2.1.1.2 Part-circle
4.2.1.1.2.1 Fixed-pattern
4.2.1.1.2.2 Adjustable pattern
4.2.1.2 Non-circular (polygonal, rounded non-circular)
4.2.2 Type of spray
4.2.2.1 Sheet spray
4.2.2.2 Jet spray
© ISO 2009 – All rights reserved 3
---------------------- Page: 9 ----------------------
SIST ISO 8026:2015
ISO 8026:2009(E)
4.3 Classification according to performance characteristics (flow rate regulation)
4.3.1 Regulated sprayers
4.3.2 Non-regulated sprayers
4.4 Classification according to type of connection
4.4.1 Threaded
4.4.2 Insert barb
4.4.3 Bayonet
4.4.4 Other
4.5 Classification according to additional functions
4.5.1 Pop-up/fixed
4.5.2 Valve in head
5 General requirements
5.1 Materials
The plastics parts of the sprayers, which conduct water and which are exposed to sunlight, shall be opaque
and shall contain an additive to protect against UV radiation.
Sprayers may be made from a copper alloy or from other materials, whose mechanical properties and
resistance to corrosion when used with irrigation water are similar to those of copper alloys.
On request, the manufacturer shall provide information about the resistance of the sprayer to chemicals used
in agriculture.
5.2 Manufacture and assembly
The sprayers shall have no manufacturing defects which might be detrimental to their operation.
The sprayers shall incorporate features for easy fitting and assembly. All sprayers equipped with removable
parts shall be easy to assemble manually or by using common tools. Should any special tool be required, the
manufacturer shall be able to furnish them on request. The removable parts of one sprayer shall be
interchangeable with those of other units of the same make and type.
5.3 Connections
The sprayer connections shall be specified according to the connection type and the corresponding
International Standard.
5.3.1 Threaded connection
For sprayers designed for threaded connection to irrigation laterals, the screw threads shall comply with
ISO 7-1. Alternatively, other threads may be allowed provided that a suitable adaptor is supplied with each
threaded connection, making it comply with ISO 7-1.
4 © ISO 2009 – All rights reserved
---------------------- Page: 10 ----------------------
SIST ISO 8026:2015
ISO 8026:2009(E)
5.3.2 On line connection
The manufacturer shall specify the type and size of flexible tube for which the connections are suitable.
All complementary information shall be supplied by the manufacturer.
6 Test methods
6.1 Measurements
The accuracy required for all measurements not specifically addressed in this International Standard shall be
± 3 %.
Application depths within collectors shall be measured to an accuracy of ± 1 %.
The test pressure shall not vary by more than ± 2 % during the test period. The pressure shall be measured to
an accuracy of ± 1 %.
The flow rate through the sprayer shall be measured to an accuracy of ± 1 %.
The temperature shall be measured to an accuracy of ± 0,5 °C. For indoor testing, the water temperature shall
be (23 ± 3) °C.
Time shall be measured with stopwatches accurate to ± 0,1 s.
6.2 General test conditions
Perform the test on sprayers which have previously been examined visually (without disassembly) for
satisfactory workmanship and quality.
Attach test sprayers to the supply line according to the field assembly recommendations of the manufacturer.
Maintain the sprayer within ± 2° of vertical.
There shall be no visually detectable external leakage during the test.
Sprayers of the same type, but with different nozzles or different means of attachment, shall be tested
separately for each combination of sprayer and nozzle or sprayer and means of attachment.
Collectors shall be designed in accordance with ISO 15886-3:2004, 4.1, and shall incorporate the following
features.
a) They shall be identical.
b) The vertical dimension of each collector shall be at least twice the maximum depth of the water collected
during the test, but not less than 150 mm.
c) The circular opening with sharp edges shall be free of deformities.
d) The diameter shall be from one half to one times the height, but shall not be less than 85 mm.
The opening of all collectors shall be in a common horizontal plane, with a slope not exceeding 2 % in any
direction.
Sprayer nozzle height above the openings of the collectors shall be 0,20 m or at a height as specified by the
manufacturer.
© ISO 2009 – All rights reserved 5
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SIST ISO 8026:2015
ISO 8026:2009(E)
6.3 Hydraulic tests
Perform the tests indoors, in drift-free conditions or in an outdoor area under no wind conditions (maximum
allowable wind speed less than 0,5 m/s).
Relative humidity and ambient temperature shall be measured at the start, midpoint and end of the test. For
indoor testing, changes in temperature and humidity during the test shall not exceed ± 5 % of the pre-test
ambient.
In order to take evaporation into account, put three control collectors into the test area, but outside the sprayer
range. Place the target depth of water in each collector just prior to the start of the test. At the conclusion of
the test, measure the final water depth and compute the evaporation by subtracting the final from the initial
water depth and averaging the three results.
Prior to conducting the functional and operational tests, operate each test sprayer for 1 h at test pressure, in
order to establish stable conditions.
6.3.1 Hydraulic test to be performed for each type of sprayer
The minimum tests to be performed for each type of sprayer are shown in Table 1.
Table 1 — Hydraulic tests
Hydraulic test
Flow rate
Spray Water as a
Sprayer type
Diameter of Uniformity Trajectory
coverage distribution function
coverage of flow rate height
pattern curve of inlet
pressure
Uniform spray coverage pattern 6.3.2 6.3.3 6.3.4
6.3.5 6.3.6 6.3.7
plus full circle Method 2 Method 1 Method 2
Uniform spray coverage pattern 6.3.2 6.3.3 6.3.4
6.3.5 6.3.6 6.3.7
plus part-circle Method 1 Method 1 Method 1
Non-uniform spray coverage 6.3.2 6.3.3 6.3.4
6.3.5 6.3.6 6.3.7
pattern plus full circle Method 1 Method 2 Method 1
6.3.2 6.3.4
6.3.3
Non-circular/part-circle 6.3.5 6.3.6 6.3.7
a a
Method 2
Method 1 Method 1
Other — — — 6.3.5 6.3.6 —
a
The diameter of coverage and the water distribution curve shall be calculated using the spray coverage pattern.
6.3.2 Diameter of coverage
The test specimen to perform this test shall be taken at random from the test sample used to determine the
uniformity of flow rate and the flow rate as a function of inlet pressure.
6.3.2.1 Method 1
The collectors shall be placed on a level surface along 8 radii which are determined by lines extending from
the sprayer at 45° angles. In the radii, the collectors shall be spaced at 0,25 m for sprayers with a diameter of
coverage of up to 6 m, or 0,5 m for sprayers with a diameter of coverage greater than 6 m. The end of each
line shall extend beyond the surface sprayed.
The sprayer shall be placed
...
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