ISO 12809:2020 作物保護装置—往復容積式ポンプと遠心ポンプ—試験方法 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 6, Equipment for crop protection.

This second edition cancels and replaces the first edition (ISO 12809:2011), which has been technically revised.

The main changes compared to the previous edition are as follows.

• The definitions for the following terms have been modified:
  • 3.1 reciprocating positive displacement pump;
  • 3.2 centrifugal pump;
  • 3.12 air vent line.

• In Clause 4, text has been added to better specify the test on pump installed on the sprayer.

• In Clause 5, more specification about the test liquid has been provided.

• In 7.2, Figure 2 and related text have been added to better specify how to manage test with centrifugal pumps.

• The following subclauses have been improved:

  • 7.3
  • 7.3.1
  • 7.3.2
  • 7.3.3
  • 7.3.3.1
  • 7.3.3.2
  • 7.3.3.3

• A new Annex B has been added.

1 Scope

This document specifies test methods and the environmental conditions for evaluating the performance of reciprocating positive displacement pumps and centrifugal pumps designed for crop protection equipment.

This document is applicable when defining the performance of stand-alone pumps or pumps that are installed on a sprayer.

Some of the tests indicated in this document are suited only for specific pump types.

It is not applicable to pesticide metering pumps for injection systems.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5681 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses: