ISO 9635-4:2014 農業用灌漑設備—灌漑バルブ—パート4：エアバルブ | ページ 2

Foreword

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The committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.

This second edition cancels and replaces the first edition (ISO 9635-4:2006) which has been technically revised.

ISO 9635 consists of the following parts, under the general title Agricultural irrigation equipment — Irrigation valves:

• Part 1: General requirements
• Part 2: Isolating valves
• Part 3: Check valves
• Part 4: Air valves
• Part 5: Control valves

1 Scope

This part of ISO 9635 specifies construction and performance requirements and test methods for air valves, intended for operation in irrigation systems with water at temperatures not exceeding 60 °C, which can contain fertilizers and other chemicals of the types and concentrations used in agriculture.

It is applicable to hydraulically operated air irrigation valves of DN 15 diameter or greater, designed to be directly operated, i.e. the force is applied to the obturator by the float, either directly or via a mechanical linkage. The valves can be operated by a force applied through an adjustable pilot valve.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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 9635-1:2014 and the following apply.

Bibliography