ISO 9644:2018 PDF
Agricultural irrigation equipment — Pressure losses in irrigation valves — Test method
Agricultural irrigation equipment — Pressure losses in irrigation valves — Test method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 19
- Дата публикации:
- 16 августа 2018 г.
- Издание:
- ISO IS 9644 edition 3 version 1
- ICS:
- 65.060.35
This document applies to manually-activated valves only. This document specifies a test method for determining the pressure loss in agricultural irrigation valves under steady-state conditions when water flows through them. The scope and accuracy of the valve performance specifications presented will assist agricultural irrigation system designers in comparing pressure losses through various types of valves. The measurement of pressure losses provides a means for determining the relationship between pressure loss and flow rate through the valve. This document also describes the method of reporting pertinent test data. No attempt is made to define product use, design or applications. The test method is suitable for valves with equal inlet and outlet nominal sizes.
Abstract
Overview
ISO 9644:2018 specifies a standardized test method for measuring pressure losses in agricultural irrigation valves under steady-state water flow. Applicable to manually-activated valves with equal inlet and outlet nominal sizes, the standard defines the test installation, measurement requirements, calculation of valve performance coefficients, and the format for reporting test data. Its purpose is to help irrigation system designers, manufacturers and test laboratories compare pressure loss characteristics across valve types.
Key topics and technical requirements
- Scope: Manually‑activated irrigation valves; steady‑state flow; equal inlet/outlet nominal sizes.
- Test installation: Upstream and downstream piping must match valve connection diameter and include specified straight lengths and pressure‑tap locations. A downstream throttling valve controls flow.
- Measuring equipment & accuracy: Permissible deviations - flow ±2%, pressure ±2%, temperature ±1 °C. Flow meter location, pressure differential device and temperature sensors are specified.
- Pressure taps: Two taps for DN
Технические детали
- Технический комитет
- ISO/TC 23/SC 18 - Irrigation and drainage equipment and systems
- SKU
- ISO 9644:2018
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