ASTM E641-01
(Test Method)Standard Methods for Testing Hydraulic Spray Nozzles Used in Agriculture
Standard Methods for Testing Hydraulic Spray Nozzles Used in Agriculture
SCOPE
1.1 These methods cover procedures for testing hydraulic spray nozzles used in agriculture. The methods herein cover the following performance parameters: nozzle flow rate, nozzle spray angle, liquid distribution, spray droplet size, and nozzle wearability.
1.2 These methods are applicable to hydraulic spray nozzles which produce the following spray patterns: flat-fan, hollow cone, and full cone.
1.3 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:E641–01
Standard Methods for Testing
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Hydraulic Spray Nozzles Used in Agriculture
This standard is issued under the fixed designation E 641; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.1.1.4 hollow cone and full cone nozzle—the hollow cone
nozzle normally provides uniform distribution throughout a
1.1 These methods cover procedures for testing hydraulic
hollow cone pattern area. The full cone nozzle, provides
spraynozzlesusedinagriculture.Themethodshereincoverthe
uniform distribution throughout its full cone pattern. Both
following performance parameters: nozzle flow rate, nozzle
typesareusedextensivelyforsprayingoffruitsandvegetables,
spray angle, liquid distribution, spray droplet size, and nozzle
some row crops with pesticides, and aerial applications.
wearability.
1.2 These methods are applicable to hydraulic spray nozzles
3. Significance and Use
which produce the following spray patterns: flat-fan, hollow
3.1 The purpose of these methods is to provide uniform
cone, and full cone.
testing procedures for evaluating the performance criteria of
1.3 This standard does not purport to address the safety
hydraulic spray nozzles used for agricultural purposes.
problems associated with its use. It is the responsibility of the
3.2 The procedures set forth in these methods are for spray
user of this standard to establish appropriate safety and health
nozzles of the hydraulic energy type in which the spray
practices and determine the applicability of regulatory limita-
material is forced through an orifice under pressure, providing
tions prior to use.
fluid break-up into droplets.
2. Terminology 3.3 Droplet producing nozzles that operate by means other
than hydraulic energy are not applicable to these methods.
2.1 Definitions of Terms Specific to This Standard:
2.1.1 The types of hydraulic spray nozzles considered are
4. Apparatus
categorized according to spray characteristics, as follows:
4.1 This section covers equipment used in testing hydraulic
2.1.1.1 flat-fan “tapered edge” type spray nozzle—this
spray nozzles. The equipment and apparatus listed are suffi-
nozzle provides a range of atomization sizes throughout the
cient for use in all methods described herein.
pattern area. Its edges are tapered to permit the overlapping of
4.2 Fundamental equipment common to all of the test
spray patterns from adjacent nozzles, thereby providing rela-
methods are as follows:
tively uniform overall distribution. These nozzles are popular
4.2.1 Water Reservoir or Retaining Vessel—A water reser-
on field-type crop sprayers where uniform coverage is desired
voir or vessel sufficiently large to provide smooth continuous
across the swath.
flow to the nozzle(s) throughout the duration of a particular
2.1.1.2 flat fan “even edge” type spray nozzle—this nozzle
test.
provides relatively uniform atomization size as compared to
4.2.2 Pump or Source of Water Pressure— A pump or
the “tapered edge” type nozzle and uniform distribution
source of water pressure sufficient to maintain the required test
throughout the spray pattern. There is no requirement for
pressure with less than 62 % deviation from the nominal
overlap of adjacent spray patterns when using this nozzle. It is
pressure.
used primarily to spray uniform strips or bands in fields.
4.2.3 Pressure Gage:
2.1.1.3 flooding or deflector-fan type spray nozzle—this
4.2.3.1 A pressure gage with an accuracy of 62 % at the
nozzle produces a low impact spray with a wide-angle flat
actual working pressure. It should have a maximum pressure
pattern having uniform distribution when low pressures are
reading on the dial face such that the test pressure can be as
used. It is used primarily on field-type sprayers when broad
near the midrange of the gage as possible.
coverage at lower pressures is desired.
4.2.3.2 The pressure gage should be calibrated prior to use
at each of the required test pressures by using a Certified Dead
Weight Gage calibrator or a suitable manometer capable of
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These methods are under the jurisdiction of ASTM Committee E35 on
gage calibration.
Pesticides, and are the direct responsibility of Subcommittee E35.22 on Pesticide
4.2.4 Pressure Regulator,
Formulations and Application Systems.
4.2.5 Control Valves,
Current edition approved April 10, 2001. Published July 2001. Originally
published as E 641 – 78. Last previous edition E 641 – 00. 4.2.6 Inline Strainer,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E641
4.2.7 Pipi
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