SIST EN ISO 13693-1:2017

Irrigation equipment - Safety devices for chemigation - Part 1: Small plastics valves for chemigation (ISO 13693-1:2013)

ISO 13693-1:2013 specifies the general requirements and test methods for small plastics-bodied valves used for chemigation, intended for operation in irrigation pipe systems which may contain fertilizers and chemicals of the type and concentration used in agriculture.
It is applicable to controllable safety devices (also known as backflow preventers) with a reduced pressure zone (RPZ), intended to prevent backflow by back-siphonage or backpressure of irrigation water into an upstream potable water distribution system, whenever the pressure in the latter is lower than that in the system located downstream.
It is applicable to such devices of nominal size up to and including DN 50 (2"), with a nominal pressure of PN10, that are capable of working without modification or adjustment at any pressure up to 1 MPa (10 bar), with any pressure variation up to 1 MPa (10 bar), and in permanent duty at temperatures up to 45 °C and for 1 h at 65 °C.

Bewässerungsausrüstung - Sicherheitseinrichtungen für Düngemittelzusätze - Teil 1: Kleine Kunststoffventile für den Düngemittelzusatz (ISO 13693-1:2013)

Dieser Teil von ISO 13693 legt die allgemeinen Anforderungen und Prüfverfahren für kleine Kunststoff¬ventile zur Verwendung in Beimischungseinrichtungen fest, die im Folgenden als "Vorrichtung" bezeichnet werden und die für den Einsatz in Bewässerungssystemen vorgesehen sind, bei denen Düngemittel und Chemikalien in für die landwirtschaftliche Anwendung üblichen Konzentrationen direkt dem Bewässerungs¬wasser zugegeben werden dürfen.
Er ist anwendbar für regelbare Sicherheitsventile (Rückschlagventile) mit Druckminderer, die den Rückfluss von Bewässerungswasser durch rückläufige Heberwirkung oder Gegendruck in angeschlossene Trinkwasserleitungssysteme verhindern sollen, falls der Druck in der Trinkwasserleitung kleiner als im Bewässerungssystem sein sollte.
Er ist auf Ventile mit Nennweiten bis einschließlich DN 50 (2 inch) mit einem Nenndruck von PN 10 anwendbar, die ohne Modifikation oder Anpassungen
-   bei jedem Druck bis zu 1 MPa (10 bar),
-   bei jeder Druckänderung bis zu 1 MPa (10 bar) und
im Dauerbetrieb bei Temperaturen bis zu 45 °C und für 1 h bei 65 °C betätigt werden können.

Matériel d'irrigation - Dispositifs de sécurité pour l'application de produits chimiques par irrigation - Partie 1: Petites vannes en matière plastique pour l'application de produits chimiques par irrigation (ISO 13693-1:2013)

L'ISO 13693-1:2013 fixe les exigences générales et les méthodes d'essai des petites vannes en matière plastique utilisées pour l'application de produits chimiques par irrigation, par la suite appelées «le dispositif», et prévues pour un fonctionnement dans des systèmes de tuyaux d'irrigation qui peuvent contenir des engrais et des produits chimiques du type et dans une concentration employés dans l'agriculture.
L'ISO 13693-1:2013 est applicable aux dispositifs de sécurité (également appelés disconnecteurs hydrauliques) contrôlables à zone de pression réduite (ZPR), destinés à empêcher les phénomènes de reflux par siphonnement inversé ou par contre-pression de l'eau d'irrigation dans un système amont de distribution d'eau potable chaque fois que la pression dans ce dernier est inférieure à celle qui règne dans le système en aval.
L'ISO 13693-1:2013 est applicable aux dispositifs concernés dont la dimension nominale est inférieure ou égale à DN 50 (2"), avec une pression nominale égale à PN 10 et qui sont capables de fonctionner sans modification ni réglage:
-      à toute pression inférieure ou égale à 1 MPa (10 bar);
-      pour toute variation de pression inférieure ou égale à 1 MPa (10 bar); et
-      en service permanent à des températures inférieures ou égales à 45 °C et pendant 1 h à 65 °C.

Namakalna oprema - Varnostne naprave za dodajanje pesticidov preko namakalnega sistema - 1. del: Mali plastični ventili za dodajanje pesticidov preko namakalnega sistema (ISO 13693-1:2013)

ISO 13693-1:2013 določa splošne zahteve in preskusne metode za male ventile za dodajanje pesticidov prek namakalnega sistema s plastičnim ohišjem za uporabo v namakalnih cevovodnih sistemih, ki lahko vsebujejo vrste in koncentracije gnojil in kemikalij, ki se uporabljajo v kmetijstvu.
Uporablja se za nadzorovane varnostne naprave (poznane tudi kot preprečevalniki povratnega toka) z območjem z zmanjšanim tlakom (RPZ), ki so namenjene za preprečevanje povratnega toka zaradi povratnega vodnega udara ali protitlaka namakalne vode v sistem za porazdelitev pitne vode proti toku, kadar koli je tlak v slednjem nižji od tlaka v sistemu na nižji stopnji toka.
Uporablja se za naprave z nazivno velikostjo največ DN 50 (2 palca) in nazivnim tlakom PN10, ki lahko obratujejo brez spremembe ali prilagoditve na katero koli vrednost tlaka do 1 MPa (10 barov), s kakršno koli spremembo tlaka največ 1 MPa (10 barov) in pri stalnem obratovanju pri temperaturah do 45 °C in za 1 h pri 65 °C.

General Information

• Status: Published
• Public Enquiry End Date: 02-Oct-2016
• Publication Date: 13-Mar-2017
• ICS: 65.060.35 - Irrigation and drainage equipment
• Technical Committee: IMKG - Machinery for agriculture and forestry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Mar-2017
• Due Date: 14-May-2017
• Completion Date: 14-Mar-2017
• Ref Project: EN ISO 13693-1:2017 - Irrigation equipment - Safety devices for chemigation - Part 1: Small plastics valves for chemigation (ISO 13693-1:2013)

Overview

EN ISO 13693-1:2017 - Irrigation equipment - Safety devices for chemigation - Part 1: Small plastics valves for chemigation (ISO 13693-1:2013) specifies general requirements and test methods for small plastic-bodied chemigation valves used in irrigation pipe systems that may contain fertilizers and agricultural chemicals. The standard covers controllable safety devices (also called backflow preventers) with a reduced pressure zone (RPZ) intended to stop backflow by back-siphonage or backpressure into an upstream potable water system. It applies to nominal sizes up to and including DN 50 (2"), nominal pressure PN10, and operation up to 1 MPa (10 bar) and temperatures up to 45 °C (continuous) and 65 °C for 1 hour.

Key topics and technical requirements

• Design principle: Devices shall provide three pressure zones - upstream, intermediate and downstream - with the intermediate zone located between two independently acting check valves and a hydraulically operated, mechanically independent relief valve.
• Pressure behavior: The upstream pressure must exceed the intermediate pressure, which must exceed the downstream pressure. The relief valve must discharge when the differential between upstream and downstream checks falls below 14 kPa (140 mbar).
• Materials: Components must be corrosion-resistant and compatible with chemicals normally used in irrigation; where contact with potable water occurs, compliance with national potable-water standards is required.
• Performance envelope: Devices must operate without modification across pressures to 1 MPa (10 bar) and with pressure variations up to that value; nominal pressure is PN10.
• Testing & characteristics: Standard includes prescribed mechanical, tightness, hydraulic, and long-term pressure endurance tests, procedures for expression of results, required markings and packaging, and instructions for inspection and replacement of internal components.
• Accessibility: Internal components must be serviceable while installed and designed to avoid incorrect reassembly; spring settings must be fixed (non-adjustable).

Applications and users

• Intended for irrigation system manufacturers, designers, installers and maintenance teams specifying or installing chemigation backflow prevention in agricultural irrigation networks.
• Relevant for suppliers of small plastics valves, quality and compliance engineers, testing laboratories and regulatory authorities concerned with protecting potable water from fertilizer/chemical contamination.
• Useful when selecting RPZ backflow preventers for drip, micro‑spray and small pipe irrigation systems (nominal sizes to DN 50).

Related standards

• ISO 9635-1 (irrigation valves - general requirements) - normative reference
• ISO 7-1 (pipe threads dimensions and designation) - normative reference
• EN ISO 13693 series: future Part 2 will address larger chemigation valve assemblies (DN 75 to DN 350)

Keywords: EN ISO 13693-1:2017, chemigation, irrigation equipment, small plastics valves, backflow preventer, reduced pressure zone (RPZ), DN 50, PN10, test methods, materials, relief valve.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2017
1DPDNDOQDRSUHPD9DUQRVWQHQDSUDYH]DGRGDMDQMHSHVWLFLGRYSUHNR
QDPDNDOQHJDVLVWHPDGHO0DOLSODVWLþQLYHQWLOL]DGRGDMDQMHSHVWLFLGRYSUHNR
QDPDNDOQHJDVLVWHPD,62
Irrigation equipment - Safety devices for chemigation - Part 1: Small plastics valves for
chemigation (ISO 13693-1:2013)
Bewässerungsausrüstung - Sicherheitseinrichtungen für Düngemittelzusätze - Teil 1:
Kleine Kunststoffventile für den Düngemittelzusatz (ISO 13693-1:2013)
Matériel d'irrigation - Dispositifs de sécurité pour l'application de produits chimiques par
irrigation - Partie 1: Petites vannes en matière plastique pour l'application de produits
chimiques par irrigation (ISO 13693-1:2013)
Ta slovenski standard je istoveten z: EN ISO 13693-1:2017
ICS:
65.060.35 Namakalna in drenažna Irrigation and drainage
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13693-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 65.060.35
English Version
Irrigation equipment - Safety devices for chemigation -
Part 1: Small plastics valves for chemigation (ISO 13693-
1:2013)
Matériel d'irrigation - Dispositifs de sécurité pour Bewässerungsausrüstung - Sicherheitseinrichtungen
l'application de produits chimiques par irrigation - für Düngemittelzusätze - Teil 1: Kleine
Partie 1: Petites vannes en matière plastique pour Kunststoffventile für den Düngemittelzusatz (ISO
l'application de produits chimiques par irrigation (ISO 13693-1:2013)
13693-1:2013)
This European Standard was approved by CEN on 8 February 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13693-1:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 13693-1:2013 has been prepared by Technical Committee ISO/TC 23 “Tractors and
machinery for agriculture and forestry” of the International Organization for Standardization (ISO) and
has been taken over as EN ISO 13693-1:2017 by Technical Committee CEN/TC 334 “Irrigation
techniques” the secretariat of which is held by UNE.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2017, and conflicting national standards
shall be withdrawn at the latest by September 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13693-1:2013 has been approved by CEN as EN ISO 13693-1:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 13693-1
First edition
2013-01-15
Irrigation equipment — Safety devices
for chemigation —
Part 1:
Small plastics valves for chemigation
Matériel d’irrigation — Dispositifs de sécurité pour l’application de
produits chimiques par irrigation —
Partie 1: Petites vannes en matière plastique pour l’application de
produits chimiques par irrigation
Reference number
ISO 13693-1:2013(E)
©
ISO 2013
ISO 13693-1:2013(E)
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 13693-1:2013(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Designation . 2
6 Materials . 2
7 Design requirements . 3
7.1 General . 3
7.2 Relief valve . 4
7.3 Pressure taps . 4
8 Characteristics and tests . 5
8.1 General test conditions . 5
8.2 Expression of the results . 6
8.3 Order of testing . 6
8.4 Mechanical characteristics. 6
8.5 Tightness tests . 9
8.6 Hydraulic characteristics .12
8.7 Long-term pressure endurance .15
9 Marking .15
10 Packaging .15
Annex A (informative) Examples of presentation of test results.17
Bibliography .23
ISO 13693-1:2013(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 13693-1 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture
and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
ISO 13693 consists of the following parts, under the general title Irrigation equipment — Safety devices
for chemigation:
— Part 1: Small plastics valves for chemigation
Chemigation valve assemblies from DN 75 to DN 350 are to form the subject of a future part 2.
iv © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 13693-1:2013(E)
Irrigation equipment — Safety devices for chemigation —
Part 1:
Small plastics valves for chemigation
1 Scope
This part of ISO 13693 specifies the general requirements and test methods for small plastics-bodied valves
used for chemigation, hereinafter referred to as “the device”, intended for operation in irrigation pipe
systems which may contain fertilizers and chemicals of the type and concentration used in agriculture.
It is applicable to controllable safety devices (also known as backflow preventers) with a reduced
pressure zone (RPZ), intended to prevent backflow by back-siphonage or backpressure of irrigation
water into an upstream potable water distribution system, whenever the pressure in the latter is lower
than that in the system located downstream.
It is applicable to such devices of nominal size up to and including DN 50 (2”), with a nominal pressure
of PN10, that are capable of working without modification or adjustment
— at any pressure up to 1 MPa (10 bar),
— with any pressure variation up to 1 MPa (10 bar), and
— in permanent duty at temperatures up to 45 °C and for 1 h at 65 °C.
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.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 9635-1, Agricultural irrigation equipment — Irrigation valves — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9635-1 and the following apply.
3.1
controllable safety device with a reduced pressure zone
controllable safety device with RPZ
device containing two independently-acting check valves (3.7) together with a hydraulically operated,
mechanically independent pressure relief valve located between the check valves
3.2
backflow
flow against the intended direction of flow
3.3
back-siphonage
backflow (3.2) due to a reduction in system pressure, which causes a sub-atmospheric pressure at a site
in the system
ISO 13693-1:2013(E)
3.4
backpressure
elevation above the supply pressure of the pressure downstream in a piping system which could cause
a reversal of the flow from its intended direction
3.5
nominal pressure
PN
maximum static water pressure, immediately upstream of a small plastics valve used for chemigation
(3.6), at which the valve is required to operate
3.6
chemigation
application of any chemical through an irrigation system
3.7
check valve
valve which automatically opens by fluid flow in a defined direction and which automatically closes to
prevent fluid flow in the reverse direction
4 Classification
The nominal and connection sizes of the device shall be in accordance with Table 1.
Table 1 — Connection sizes of threaded and flanged devices
Nominal size DN, mm 8 10 15 20 25 32 40 50
Nominal diameter of threaded connections
1/4 3/8 1/2 3/4 1 1¼ 1½ 2
(in accordance with ISO 7-1), inches
Nominal diameter of flanged connections, mm — — — — — — 40 50
5 Designation
The device shall be designated as follows:
a) type;
b) nominal size (DN) (see Table 1);
c) nominal pressure (PN);
d) connection type;
e) type of plastics material (generic);
f) reference to this part of ISO 13693.
6 Materials
The manufacturer shall state, in the technical and sales literature on the device, the types of materials
from which the device is made.
The device shall be corrosion-resistant.
The materials from which the device is manufactured shall be compatible with chemicals normally used
in irrigation systems.
2 © ISO 2013 – All rights reserved

ISO 13693-1:2013(E)
Where the device may come into contact with potable water, the device and the materials from which it
is manufactured shall comply with national standards for potable water.
7 Design requirements
7.1 General
The design characteristics (see Figure 1) of the device shall be as follows:
a) three pressure zones — upstream, intermediate and downstream — such that the pressure, P , in
the upstream zone is greater than the pressure, P , in the intermediate zone, which is greater than
i
the pressure, P , in the downstream zone, under static (no flow) and flow conditions;
b) P − P > 14 kPa (140 mbar);
1 i
c) intermediate pressure zone connected to the atmosphere, when P − P ≤ 14 kPa (140 mbar);
1 i
d) intermediate pressure zone disconnected from the atmosphere, when P ≤ 14 kPa (140 mbar);
e) minimum set discharge flow (backflow rate);
f) allows verification, in every zone, of disconnection and sealing of the protection devices (obturators,
discharge valves).
Key
1 upstream pressure (P ) zone
2 intermediate pressure (P ) zone
i
3 downstream pressure (P ) zone
4 upstream check valve
5 downstream check valve
6 relief valve
7 pressure tap orifice
8 funnel
a
Upstream.
b
Downstream.
Figure 1 — Design principle
The internal components of the device shall be accessible for inspection, repair or replacement. These
operations shall be possible even when the device is installed. The components shall be able to be
replaced without removing the device, without ambiguity (impossibility of reversal or interchange of
obturators, diaphragms, springs, etc.). A visible mark is not sufficient.
The settings of the springs shall be fixed and not adjustable.
Only the water pressure of the supply network shall be able to operate the control of the internal
components of the device.
ISO 13693-1:2013(E)
Possible additional control devices (electric, pneumatic, etc.) shall not adversely affect the backflow
protection function.
The device shall be installed horizontally, except where the manufacturer states that it can also be
installed in the vertical position. The tests shall be carried out in the prescribed position.
7.2 Relief valve
When the differential pressure between the upstream and downstream check valves is less than 14 kPa
(140 mbar), the relief valve shall be open to ensure positive safety (draining the intermediate pressure
zone to the atmosphere).
The internal vertical distance, h (in the disconnected position), between the highest point of the seat of
the relief valve and the lowest point of the seat of the upstream check valve (see Figure 2) shall be
— h ≥ 5 mm, for DN ≤ 15, and
— h ≥ 10 mm, for 15 < DN ≤ 50.
a
Upstream.
b
Downstream.
Figure 2 — Relief valve
In all installation positions indicated by the manufacturer, no water retention shall be permitted within
the intermediate pressure zone.
2 2
The cross-section of the passage orifices shall be ≥45 mm with DN > 15, or 12,5 mm with DN ≤ 15; no
dimension for the calculation of the cross-section shall be less than 4 mm.
A device fitted with a funnel shall evacuate at the full relief flow rate defined in Table 6.
The funnel to the drain shall be
— directly incorporated into the device,
— factory fitted, or
— supplied with the device.
The structure of the relief orifice of
...