ASTM E641-01(2006)
(Test Method)Standard Methods for Testing Hydraulic Spray Nozzles Used in Agriculture
Standard Methods for Testing Hydraulic Spray Nozzles Used in Agriculture
SIGNIFICANCE AND USE
The purpose of these methods is to provide uniform testing procedures for evaluating the performance criteria of hydraulic spray nozzles used for agricultural purposes.
The procedures set forth in these methods are for spray nozzles of the hydraulic energy type in which the spray material is forced through an orifice under pressure, providing fluid break-up into droplets.
Droplet producing nozzles that operate by means other than hydraulic energy are not applicable to these methods.
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.
This standard does not purport to address the safety concerns 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(Reapproved 2006)
Standard Methods for Testing
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Hydraulic Spray Nozzles Used in Agriculture
This standard is issued under the fixed designation E641; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope used. It is used primarily on field-type sprayers when broad
coverage at lower pressures is desired.
1.1 These methods cover procedures for testing hydraulic
2.1.1.4 hollow cone and full cone nozzle—the hollow cone
spraynozzlesusedinagriculture.Themethodshereincoverthe
nozzle normally provides uniform distribution throughout a
following performance parameters: nozzle flow rate, nozzle
hollow cone pattern area. The full cone nozzle, provides
spray angle, liquid distribution, spray droplet size, and nozzle
uniform distribution throughout its full cone pattern. Both
wearability.
typesareusedextensivelyforsprayingoffruitsandvegetables,
1.2 These methods are applicable to hydraulic spray nozzles
some row crops with pesticides, and aerial applications.
which produce the following spray patterns: flat-fan, hollow
cone, and full cone.
3. Significance and Use
1.3 This standard does not purport to address the safety
3.1 The purpose of these methods is to provide uniform
concerns associated with its use. It is the responsibility of the
testing procedures for evaluating the performance criteria of
user of this standard to establish appropriate safety and health
hydraulic spray nozzles used for agricultural purposes.
practices and determine the applicability of regulatory limita-
3.2 The procedures set forth in these methods are for spray
tions prior to use.
nozzles of the hydraulic energy type in which the spray
material is forced through an orifice under pressure, providing
2. Terminology
fluid break-up into droplets.
2.1 Definitions of Terms Specific to This Standard:
3.3 Droplet producing nozzles that operate by means other
2.1.1 The types of hydraulic spray nozzles considered are
than hydraulic energy are not applicable to these methods.
categorized according to spray characteristics, as follows:
2.1.1.1 flat-fan “tapered edge” type spray nozzle—this
4. Apparatus
nozzle provides a range of atomization sizes throughout the
4.1 This section covers equipment used in testing hydraulic
pattern area. Its edges are tapered to permit the overlapping of
spray nozzles. The equipment and apparatus listed are suffi-
spray patterns from adjacent nozzles, thereby providing rela-
cient for use in all methods described herein.
tively uniform overall distribution. These nozzles are popular
on field-type crop sprayers where uniform coverage is desired 4.2 Fundamental equipment common to all of the test
across the swath. methods are as follows:
2.1.1.2 flat fan “even edge” type spray nozzle—this nozzle 4.2.1 Water Reservoir or Retaining Vessel—A water reser-
provides relatively uniform atomization size as compared to voir or vessel sufficiently large to provide smooth continuous
the “tapered edge” type nozzle and uniform distribution flow to the nozzle(s) throughout the duration of a particular
throughout the spray pattern. There is no requirement for test.
overlap of adjacent spray patterns when using this nozzle. It is 4.2.2 Pump or Source of Water Pressure—Apump or source
used primarily to spray uniform strips or bands in fields. of water pressure sufficient to maintain the required test
2.1.1.3 flooding or deflector-fan type spray nozzle—this pressure with less than 62 % deviation from the nominal
nozzle produces a low impact spray with a wide-angle flat pressure.
pattern having uniform distribution when low pressures are 4.2.3 Pressure Gage:
4.2.3.1 A pressure gage with an accuracy of 62 % at the
actual working pressure. It should have a maximum pressure
reading on the dial face such that the test pressure can be as
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These methods are under the jurisdiction of ASTM Committee E35 on
near the midrange of the gage as possible.
Pesticides, Antimicrobials, and Alternative Control Agents and are the direct
responsibility of Subcommittee E35.22 on Pesticide Formulations and Delivery
4.2.3.2 The pressure gage should be calibrated prior to use
Systems.
at each of the required test pressures by using a Certified Dead
Current edition approved Nov. 1, 2006. Published November 2006. Originally
Weight Gage calibrator or a suitable manometer capable of
approved in 1978. Last previous edition approved in 2001 as E641 – 01. DOI:
10.1520/E0641-01R06. gage calibration.
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