ISO 7714:2018

Name: ISO 7714:2018 — Agricultural irrigation equipment — Volumetric valves — General requirements and test methods
SKU: ISO 7714:2018
Price: 25 EUR
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Agricultural irrigation equipment — Volumetric valves — General requirements and test methods

Название (английский):

ISO 7714:2018

Agricultural irrigation equipment — Volumetric valves — General requirements and test methods

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 7 мая 2018 г.
Издание:: ISO IS 7714 edition 5 version 1
ICS:: 65.060.35

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Описание (английский):

This document specifies general requirements and test methods for volumetric valves able to automatically deliver preset quantities of water. It is applicable to valves actuated by pipeline pressure and flow alone, and which do not need any other, external, source of energy. NOTE Volumetric valves are typically required to operate correctly with different qualities of irrigation water at a variety of flow rates and at temperatures between 5 °C and 50 °C.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 7714:2018 - "Agricultural irrigation equipment - Volumetric valves - General requirements and test methods" is the international standard that defines the general requirements, classification and test methods for volumetric valves used in agricultural irrigation. The document covers valves that automatically deliver preset quantities of water and are actuated solely by pipeline pressure and flow (no external energy source). It is the fifth edition (2018) and supersedes ISO 7714:2008. The standard notes typical operating conditions, for example performance across a variety of irrigation water qualities and temperatures between 5 °C and 50 °C.

Key topics and technical requirements

Definitions and classification: Clear terms for volumetric, serial (single‑outlet, skip‑over, dual‑outlet) and non‑serial volumetric valves.

Accuracy classes:

Class 1 - cumulative volume counter accuracy ±2%
Class 2 - cumulative volume counter accuracy ±4%
Class 3 - preset volume mechanism without cumulative counter

Flow and pressure parameters: Definitions and requirements for minimum flow (qV1), permanent flow (qV3) and overload flow (qV4), and range of working pressures (minimum and maximum working pressure).

Markings: Mandatory permanent markings (manufacturer, serial number, flow direction, nominal pressure, accuracy class, qV3 and qV3/qV1 ratio, serial connection points).

Metrological requirements: Valves used for water measurement must comply with metrological characteristics such as those in ISO 16399:2014.

Mechanical, functional and accuracy tests: Pattern approval, thermal preconditioning, hydrostatic pressure resistance, manual opening/closing, accuracy across flow rates, pressure loss tests and endurance tests.

Materials and durability: Interchangeability of parts, resistance to agricultural chemicals, UV protection for non‑metallic parts and suitability for expected water qualities (Annex A: water quality / granulometry).

Practical applications and users

ISO 7714:2018 is essential for:

Manufacturers of irrigation volumetric valves (design, testing, marking and documentation).

Test laboratories and certification bodies conducting pattern approval and endurance testing.

Irrigation system designers and consultants specifying valves for drip, sprinkler and other irrigation installations.

Procurement and quality managers in agriculture and landscaping specifying compliance and acceptance criteria.

Regulators and metrology authorities when volumetric valves are used for measured water delivery.

Related standards

ISO 16399:2014 - Meters for irrigation water (metrological characteristics)

ISO 9644 - Pressure losses in irrigation valves - Test method

ISO 7‑1 - Pipe threads where pressure‑tight joints are made on the threads

Keywords: ISO 7714:2018, volumetric valves, agricultural irrigation equipment, test methods, metrological requirements, accuracy classes, flow rates, endurance tests.

ISO 7714:2018

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

ISO 16399:2014

Meters for irrigation water

ISO 9644:2008

Agricultural irrigation equipment — Pressure losses in irrigation valves — Test method

ISO 710-7:1984

Graphical symbols for use on detailed maps, plans and geological cross-sections — Part 7: Tectonic symbols