ISO 24649:2022

Agricultural irrigation equipment - Manually and hydraulically operated plastics valves

This document specifies the general requirements and test methods for manually operated and hydraulically operated plastics valves intended for use in agricultural irrigation systems. It is applicable to manually operated and hydraulically operated plastics valves (as indicated in Table A.2) of nominal sizes DN 8 (1/4") to DN 200 (8").

Matériel agricole d'irrigation — Vannes en matière plastique à commande manuelle par des actionneurs hydrauliques

General Information

• Status: Published
• Publication Date: 10-Feb-2022
• ICS: 65.060.35 - Irrigation and drainage equipment
• Technical Committee: ISO/TC 23/SC 18 - Irrigation and drainage equipment and systems
• Drafting Committee: ISO/TC 23/SC 18/WG 7 - Valves
• Current Stage: 6060 - International Standard published
• Start Date: 11-Feb-2022
• Due Date: 25-Nov-2022
• Completion Date: 11-Feb-2022

Relations

• Amended By: ISO 24649:2022/Amd 1:2023 - Agricultural irrigation equipment - Manually and hydraulically operated plastics valves - Amendment 1
• Effective Date: 06-Jun-2022
• Revises: ISO 9911:2006 - Agricultural irrigation equipment - Manually operated small plastics valves
• Effective Date: 26-Nov-2021

Overview

ISO 24649:2022 - "Agricultural irrigation equipment - Manually and hydraulically operated plastics valves" - specifies general requirements and test methods for plastic valves used in agricultural irrigation systems. It applies to manually and hydraulically operated plastics valves of nominal sizes DN 8 (1/4") to DN 200 (8") and covers construction, materials, performance testing and marking. The standard replaces and updates previous guidance to include hydraulically operated valves in addition to manually operated types.

Key technical topics and requirements

• Scope and intended use
  • Valves for irrigation piping networks using water up to 60 °C; compatible with fertilizers and commonly used irrigation chemicals (including treated sewage water).
• Materials and construction
  • Valve bodies must be opaque and plastics UV resistant; workmanship must be free from defects (no holes, bubbles, flash).
  • Spare parts availability during the guarantee period is required; manufacturers must provide information on chemical resistance on request.
• Dimensions and connections
  • Face-to-face dimensions for flanged valves referenced to ISO 5752; flanged connections per ISO 7005‑1 or ISO 9624. Threaded ends should comply with ISO 7‑1 or be supplied with adaptors.
• Sealing elements and elastomers
  • Disc facing ring and O‑ring requirements: hardness testing per ISO 48‑2; O‑ring hardness 60–80 Shore A ±5; compression set limits ≤ 20 % (ISO 815‑1 test conditions noted).
  • Ageing limits for disc facing rings: change in hardness between −5 and +8 Shore A after accelerated ageing (ISO 188).
• Mechanical and functional tests
  • Test methods include operating and closing torque, resistance to increased torque, pressure loss, hydrostatic shell testing, seat and stem sealing, performance at increased hydraulic pressure, and endurance testing. Standard test conditions commonly use water at 23 ± 5 °C.
• Marking and sampling
  • Requirements for marking, type tests and acceptance tests (sampling per ISO 2859‑1) are included to support conformity and quality control.

Practical applications - who uses ISO 24649:2022

• Valve manufacturers - design, material selection, production control and warranty/spare-parts policies.
• Test laboratories and QA teams - perform required mechanical and sealing tests, hydrostatic testing and endurance assessments.
• Irrigation system designers and contractors - specify compliant valves for pipelines and automated systems.
• Procurement and certification bodies - assess conformity, acceptance testing and marking for supply contracts.
• Maintenance teams - reference for spare-part interchangeability and service limits.

Related standards

• ISO 5752 (face-to-face dimensions), ISO 7005‑1 / ISO 9624 (flanged connections)
• ISO 7‑1 (pipe threads), ISO 48‑2 (rubber hardness), ISO 815‑1 (compression set), ISO 188 (accelerated ageing)
• ISO 8233 (torque test), ISO 9644 (pressure loss in irrigation valves) These referenced standards provide complementary test methods and dimensional guidance used alongside ISO 24649:2022.

Keywords: ISO 24649:2022, agricultural irrigation equipment, plastics valves, manually operated valves, hydraulically operated valves, valve test methods, irrigation system valves.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 24649
First edition
2022-02
Agricultural irrigation equipment —
Manually and hydraulically operated
plastics valves
Matériel agricole d'irrigation — Vannes en matière plastique à
commande manuelle par des actionneurs hydrauliques
Reference number
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Technical characteristics .3
4.1 General . 3
4.2 Dimensions . 3
4.3 Connections to pipeline . 3
4.4 Handwheel or handle . 4
4.5 Specific construction requirements for globe, oblique and angle valves . 4
4.5.1 Threaded valve stems . 4
4.5.2 Disc facing ring . 4
4.6 Specific construction requirements for ball valves . 4
5 Mechanical and functional tests . 5
5.1 General . 5
5.2 Operating torque . 5
5.2.1 General . 5
5.2.2 Closing torque . 5
5.2.3 Resistance to increased torque . 5
5.3 Pressure loss . 6
5.4 Resistance of valve and valve material to internal hydrostatic pressure . 6
5.5 Seat and stem sealing test . 6
5.5.1 Seat test for manually operated valves . 6
5.5.2 Seat test for hydraulically operated valves . 6
5.5.3 Stem sealing test . 7
5.6 Valve performance at increased hydraulic pressure . 7
5.7 Endurance testing . 7
6 Sampling and acceptance requirements . 8
6.1 Type-tests . 8
6.2 Acceptance tests. 8
7 Marking . . 8
Annex A (normative) Resistance of valve and valve material to hydrostatic pressure .10
Bibliography .13
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture
and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
This first edition of ISO 24649 cancels and replaces ISO 9911:2006, which has been technically revised.
The main changes are as follows:
— the scope was extended to include hydraulically operated plastics valves in addition to operated
plastics valves.
Any feedback or questions on this document should be directed to the user’s national standards body.
A complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 24649:2022(E)
Agricultural irrigation equipment — Manually and
hydraulically operated plastics valves
1 Scope
This document specifies the general requirements and test methods for manually operated and
hydraulically operated plastics valves intended for use in agricultural irrigation systems.
It is applicable to manually operated and hydraulically operated plastics valves (as indicated in
Table A.2) of nominal sizes DN 8 (1/4") to DN 200 (8").
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.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 48-2, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness between
10 IRHD and 100 IRHD
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 815-1, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient
or elevated temperatures
ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 5752, Metal valves for use in flanged pipe systems — Face-to-face and centre-to-face dimensions
ISO 7005-1, Pipe flanges — Part 1: Steel flanges for industrial and general service piping systems
ISO 8233, Thermoplastics valves — Torque — Test method
ISO 9624, Thermoplastics piping systems for fluids under pressure — Flange adapters and loose backing
flanges — Mating dimensions
ISO 9644, Agricultural irrigation equipment — Pressure losses in irrigation valves — Test method
3 Terms and definitions
For the purposes of this document, the following terms and definitions.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
body
main component of the valve which houses functioning components, provides the fluid flow
passageways and the connection ends
3.2
seat
part of the obturator (3.10) which provides the obturator sealing surface that can be an integral or a
separate component
3.3
nominal pressure
PN
numerical designation equal to the maximum working pressure specified by the manufacturer at which
a device will continuously operate
3.4
nominal size
numerical designation used to refer to the size of the device end connections which is identical to the
numerical nominal diameter of the pipe or pipes to which the device is to be connected directly
3.5
angle valve
valve with a generally cylindrical body for which the body (3.1) ends are in planes perpendicular to
each other and having a stem (3.13) the axis of which is colinear with the axis passing through the
centre of one of the body ends
3.6
ball valve
valve in which a ball can be turned to move its port, or ports, relative to the ports in the valve body
(3.1), to control the flow of water
3.7
globe valve
valve with a generally cylindrical body (3.1) in which the axes of the body ends are co-linear and in
which the axis of the stem (3.13) is perpendicular to the axes of the body ends
3.8
oblique valve
valve in which the axes of the body (3.1) ends are co-linear and in which the axis of the stem (3.13) is
oblique to the axes of the body ends
3.9
closing disc
part of an obturator (3.10) of any shape on which the disc face (3.11) is formed and to which the disc
facing ring (3.12), if used, is secured
3.10
obturator
moving member in a valve that operates to close the valve and, where applicable, contains a washer or
similar sealing device
3.11
disc face
sealing surface of the obturator (3.10) in a valve which contacts the valve seat (3.2) when the valve is in
the closed position
3.12
disc facing ring
ring, of material different from that of the closing disc (3.9), secured to the disc and used to ensure
water tightness when the valve is closed
3.13
stem
component of an obturator (3.10) on which the actuating thread is formed and by which control of the
closing component is affected
3.14
closing torque
minimum torque required to achieve full tightness of a manually operated device at nominal pressure
(3.3)
3.15
shell test
test intended to check the design strength of a valve body (3.1) under internal hydrostatic pressure
3.16
ageing
chemical change to the rubber compound created by thermal and environmental conditions ultimately
manifesting itself in a physical shift of mechanical properties
4 Technical characteristics
4.1 General
The valves are intended for installation in irrigation piping networks, using water at temperatures up
to 60 °C. They can be fitted with handwheels or add-on automatic control mechanisms.
All valve components that come in contact with water shall be suitable for use with water, fertilizers
and chemicals commonly used in irrigation, including treated sewage water.
The body material shall be opaque.
Plastics materials shall be UV resistant.
All parts of the valve shall be of good workmanship, whole and smooth, and shall contain no holes, air
bubbles, flash, projections or any other defects that could impair performance or cause injury.
All spare parts of valves shall be made available by the manufacturer within the guarantee period.
On request, the manufacturer shall supply any available information on the resistance of the valve to
corrosive attack by fertilizers and chemicals used in agriculture.
NOTE Guidance on chemical resistance can be found in ISO/TR 10358 (for plastics) and ISO/TR 7620 (for
rubbers).
Operating conditions, including pressures, are as specified by the manufacturer.
4.2 Dimensions
The face-to-face dimensions of valves for use in flanged pipe systems shall be selected from ISO 5752.
For all other types of end connections, the selection of the face-to-face dimensions shall be the
responsibility of the manufacturer.
4.3 Connections to pipeline
The flanged connection dimensions of the valve to the pipeline shall be in accordance with ISO 7005-1
or ISO 9624.
In valves with threaded ends intended for direct connection to the pipeline, the threads shall be in
accordance with ISO 7-1. However, other threads are allowed, provided that a suitable adaptor is
supplied with each threaded connection such that it complies with ISO 7-1.
...