SIST EN ISO 23553-1:2009

Safety and control devices for oil burners and oil-burning appliances - Particular requirements - Part 1: Shut-off devices for oil burners (ISO 23553-1:2007, including Cor 1:2009)

This part of ISO 23553 specifies safety, constructional and performance requirements, and testing of safety shut-off devices, for liquid fuels. This part of ISO 23553 covers type testing only. It applies to safety shut-off devices which: - are designed as e.g. automatic valves or fast-closing devices; - are used in combustion plants to interrupt the flow of liquid fuels with or without delay on closing and with or without delay on opening; - are for use with fuel oils; NOTE For other liquid fuels, additional test methods can be agreed between the manufacturer and the test authority. - form part of a device having other function(s), such as oil pumps. In this case the test methods apply to those parts or components of the device forming the safety shut-off device, i.e. those parts which are necessary for the closing function; - have declared maximum working pressures up to and including 5 000 kPa, for use on burners or in appliances using liquid fuels; - are directly or indirectly operated electrically or by mechanical or hydraulic means; - are fitted with or without closed-position indicator switches. The methods of test given in this part of ISO 23553 are intended for product type testing.

Sicherheits-, Regel- und Steuereinrichtungen für Ölbrenner und Öl verbrennende Geräte - Spezielle Anforderungen - Teil 1: Absperreinrichtungen für Ölbrenner (ISO 23553-1:2007, einschließlich Cor 1:2009)

Dieser Teil der ISO 23533 legt die Anforderungen an die Sicherheit, konstruktive Ausführung und Leistung
sowie die Prüfung von Sicherheitsabsperreinrichtungen für flüssige Brennstoffe fest.
Dieser Teil der ISO 23533 behandelt nur die Typprüfung.
Er gilt für Sicherheitsabsperreinrichtungen, die
- z. B. als automatische Ventile oder als Schnellschlussvorrichtungen konstruiert sind,
- in Feuerungsanlagen eingesetzt werden und den Durchfluss flüssiger Brennstoffe beim Schließen und
Öffnen verzögert oder unverzögert absperren bzw. frei geben,
- bei Heizölen verwendet werden,
ANMERKUNG Bei anderen flüssigen Brennstoffen können zwischen dem Hersteller und der Prüfbehörde
zusätzliche Prüfverfahren vereinbart werden.
- Bestandteile eines Gerätes mit anderen Funktionen sind, wie beispielsweise Ölpumpen. In diesem Fall
gelten die Prüfverfahren für die Teile oder Bauteile der Einrichtung, die die Sicherheitsabsperreinrichtung
bilden, d. h. für diejenigen Teile, die für die Schließfunktion erforderlich sind,
- zulässige Nenn-Betriebsdrücke bis einschließlich 5 000 kPa aufweisen und für den Einsatz in Brennern
oder Einrichtungen vorgesehen sind, die flüssige Brennstoffe verwenden,
- direkt oder indirekt elektrisch betätigt oder durch mechanische oder hydraulische Mittel betätigt werden,
- mit Meldeschaltern ausgestattet sind oder nicht.
Die in diesem Teil der ISO 23553 angegebenen Prüfverfahren sind für die Typprüfung des Produktes
vorgesehen.

Dispositifs de commande et de sécurité pour brûleurs à fioul et pour appareils à fioul - Exigences particulières - Partie 1: Dispositifs de coupure pour brûleurs à fioul (ISO 23553-1:2007, Cor 1:2009 inclus)

L'ISO 23523-1:2009 spécifie les exigences relatives à la sécurité, à la conception et aux performances et les essais applicables aux dispositifs de coupure de sécurité destinés à des appareils fonctionnant avec des combustibles liquides.
Elle ne couvre que les essais de type.
L'ISO 23523-1:2009 s'applique aux dispositifs de coupure de sécurité qui:
sont conçus pour fonctionner par exemple comme des vannes automatiques ou des dispositifs à fermeture rapide;
sont utilisés dans des installations de combustion dans le but d'interrompre l'écoulement de combustibles liquides avec ou sans retard sur la fermeture et avec ou sans retard sur l'ouverture;
sont utilisés pour des appareils fonctionnant au fioul;
font partie d'un dispositif ayant d'autres fonctions, par exemple des pompes à huile — dans ce cas, les méthodes d'essai s'appliquent aux parties ou aux composants du dispositif qui constituent le dispositif de coupure de sécurité, c'est-à-dire les parties qui sont nécessaires à la fonction de fermeture;
présentent des pressions de service maximales déclarées allant jusqu'à 5 000 kPa inclus, à utiliser avec des brûleurs ou dans des applications utilisant des combustibles liquides;
sont actionnés directement ou indirectement par un moyen électrique, mécanique ou hydraulique;
sont équipés ou non de commutateurs à indicateurs de position fermée.
Les méthodes d'essai données dans l'ISO 23523-1:2009 sont destinées aux essais de type d'un produit.

Varnostne in nadzorne naprave za oljne gorilnike in aparate na olje - Posebne zahteve - 1. del: Varnostno zaporne naprave za oljne gorilnike (ISO 23553-1:2007, vključno s popravkom Cor 1:2009)

General Information

• Status: Withdrawn
• Public Enquiry End Date: 19-Feb-2009
• Publication Date: 18-Nov-2009
• Withdrawal Date: 29-May-2014
• ICS: 27.060.10 - Liquid and solid fuel burners
• Technical Committee: OGS - Heating for buildings
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 30-May-2014
• Due Date: 22-Jun-2014
• Completion Date: 30-May-2014
• Ref Project: EN ISO 23553-1:2009 - Safety and control devices for oil burners and oil-burning appliances - Particular requirements - Part 1: Shut-off devices for oil burners (ISO 23553-1:2007, including Cor 1:2009)

Relations

• Replaces: SIST EN 264:2000 - Safety shut-off devices for combustion plants using liquid fuels - Safety requirements and testing
• Effective Date: 01-Dec-2009
• Replaced By: SIST EN ISO 23553-1:2014 - Safety and control devices for oil burners and oil-burning appliances - Particular requirements - Part 1: Shut-off devices for oil burners (ISO 23553-1:2014)
• Effective Date: 01-Jul-2014

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 23553-1:2009
01-december-2009
1DGRPHãþD
SIST EN 264:2000
9DUQRVWQHLQQDG]RUQHQDSUDYH]DROMQHJRULOQLNHLQDSDUDWHQDROMH3RVHEQH
]DKWHYHGHO9DUQRVWQR]DSRUQHQDSUDYH]DROMQHJRULOQLNH,62
YNOMXþQRVSRSUDYNRP&RU
Safety and control devices for oil burners and oil-burning appliances - Particular
requirements - Part 1: Shut-off devices for oil burners (ISO 23553-1:2007, including Cor
1:2009)
Sicherheits-, Regel- und Steuereinrichtungen für Ölbrenner und Öl verbrennende Geräte
- Spezielle Anforderungen - Teil 1: Absperreinrichtungen für Ölbrenner (ISO 23553-
1:2007, einschließlich Cor 1:2009)
Dispositifs de commande et de sécurité pour brûleurs à fioul et pour appareils à fioul -
Exigences particulières - Partie 1: Dispositifs de coupure pour brûleurs à fioul (ISO
23553-1:2007, Cor 1:2009 inclus)
Ta slovenski standard je istoveten z: EN ISO 23553-1:2009
ICS:
27.060.10 *RULOQLNLQDWHNRþHLQWUGR Liquid and solid fuel burners
JRULYR
SIST EN ISO 23553-1:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 23553-1:2009

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SIST EN ISO 23553-1:2009
EUROPEAN STANDARD
EN ISO 23553-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2009
ICS 27.060.10 Supersedes EN 264:1991
English Version
Safety and control devices for oil burners and oil-burning
appliances - Particular requirements - Part 1: Shut-off devices
for oil burners (ISO 23553-1:2007, including Cor 1:2009)
Dispositifs de commande et de sécurité pour brûleurs à Sicherheits-, Regel- und Steuereinrichtungen für Ölbrenner
fioul et pour appareils à fioul - Exigences particulières - und Öl verbrennende Geräte - Spezielle Anforderungen -
Partie 1: Dispositifs de coupure pour brûleurs à fioul (ISO Teil 1: Absperreinrichtungen für Ölbrenner (ISO 23553-
23553-1:2007, Cor 1:2009 inclus) 1:2007, einschließlich Cor 1:2009)
This European Standard was approved by CEN on 28 May 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23553-1:2009: E
worldwide for CEN national Members.

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SIST EN ISO 23553-1:2009
EN ISO 23553-1:2009 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 23553-1:2009
EN ISO 23553-1:2009 (E)
Foreword
The text of ISO 23553-1:2007, including Cor 1:2009 has been prepared by Technical Committee ISO/TC 161
“Control and safety devices for non-industrial gas-fired appliances and systems - STAND- BY” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 23553-1:2009 by
Technical Committee CEN/TC 47 “Atomizing oil burners and their components - Function - Safety - Testing”
the secretariat of which is held by DIN.
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 December 2009, and conflicting national standards shall be withdrawn
at the latest by December 2009.
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.
This document supersedes EN 264:1991.
According to edition EN 264:1991 the following fundamental changes are given:
a) EN ISO 23553-1 is entirely revised and structured as a part 2 standard referring of the ISO 23550 which
holds the general requirements;
b) all normative references have been updated and reallocated to ISO and IEC standards;
c) new requirements such as for electrical functions, for EMC as well as for materials added;
d) additional tests have been added, e.g. EMC, electrical behaviour, endurance tests;
e) marking, installation and operating instructions modified;
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 23553-1:2007, including Cor 1:2009 has been approved by CEN as a EN ISO 23553-1:2009
without any modification.


3

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SIST EN ISO 23553-1:2009

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SIST EN ISO 23553-1:2009

INTERNATIONAL ISO
STANDARD 23553-1
First edition
2007-09-15

Safety and control devices for oil burners
and oil-burning appliances — Particular
requirements —
Part 1:
Shut-off devices for oil burners
Dispositifs de commande et de sécurité pour brûleurs à fioul et pour
appareils à fioul — Exigences particulières —
Partie 1: Dispositifs de coupure pour brûleurs à fioul




Reference number
ISO 23553-1:2007(E)
©
ISO 2007

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
PDF disclaimer
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©  ISO 2007
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.
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Published in Switzerland

ii © ISO 2007 – All rights reserved

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Classification. 6
4.1 Classes of shut-off device . 6
4.2 Control groups . 6
5 Test conditions . 6
6 Construction. 6
6.1 General. 6
6.2 Construction requirements. 7
6.3 Materials . 8
6.4 Oil connections . 10
6.5 EMC and electrical requirements . 11
7 Performance . 12
7.1 General. 12
7.2 Leak-tightness. 12
7.3 Torsion and bending . 13
7.4 Flow capacity . 14
7.5 Durability . 14
7.6 Functional requirements. 15
7.7 Endurance . 15
8 EMC test. 15
9 Marking, installation and operating instructions . 16
9.1 Marking . 16
9.2 Installation and operating instructions . 17
Annex A (normative) Regional specific requirements for Japan . 18
Bibliography . 20

© ISO 2007 – All rights reserved iii

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(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 23553-1 was prepared by Technical Committee ISO/TC 161, Control and protective devices for gas and
oil burners and gas and oil burning appliances.
ISO 23553 consists of the following parts, under the general title Safety and control devices for oil burners and
oil-burning appliances — Particular requirements:
⎯ Part 1: Shut-off devices for oil burners

iv © ISO 2007 – All rights reserved

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SIST EN ISO 23553-1:2009
INTERNATIONAL STANDARD ISO 23553-1:2007(E)

Safety and control devices for oil burners and oil-burning
appliances — Particular requirements —
Part 1:
Shut-off devices for oil burners
1 Scope
This part of ISO 23553 specifies safety, constructional and performance requirements, and testing of safety
shut-off devices, for liquid fuels.
This part of ISO 23553 covers type testing only.
It applies to safety shut-off devices which:
⎯ are designed as e.g. automatic valves or fast-closing devices;
⎯ are used in combustion plants to interrupt the flow of liquid fuels with or without delay on closing and with
or without delay on opening;
⎯ are for use with fuel oils;
NOTE For other liquid fuels, additional test methods can be agreed between the manufacturer and the test
authority.
⎯ form part of a device having other function(s), such as oil pumps. In this case the test methods apply to
those parts or components of the device forming the safety shut-off device, i.e. those parts which are
necessary for the closing function;
⎯ have declared maximum working pressures up to and including 5 000 kPa, for use on burners or in
appliances using liquid fuels;
⎯ are directly or indirectly operated electrically or by mechanical or hydraulic means;
⎯ are fitted with or without closed-position indicator switches.
The methods of test given in this part of ISO 23553 are intended for product type testing.
2 Normative references
The following referenced documents are indispensable for the application 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 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
© ISO 2007 – All rights reserved 1

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
ISO 1817:2005, Rubber, vulcanized — Determination of the effect of liquids
ISO 7005-1, Pipe flanges — Part 1: Steel flanges for industrial and general service piping systems
ISO 7005-2, Metallic flanges — Part 2: Cast iron flanges
ISO 7005-3, Metallic flanges — Part 3: Copper alloy and composite flanges
ISO 23550:2004, Safety and control devices for gas burners and gas-burning appliances — General
requirements
ISO 23551-1:2006, Safety and control devices for gas burners and gas-burning appliances — Particular
requirements — Part 1: Automatic valves
IEC 60529:2001, Degrees of protection provided by enclosures (IP Code)
IEC 60534-1, Industrial-process control valves — Part 1: Control valve terminology and general
considerations
IEC 60534-2-3, Industrial-process control valves — Part 2-3: Flow capacity — Test procedures
IEC 60730-1:1999, Automatic electrical controls for household and similar use — Part 1: General
requirements
EN 1057, Copper and copper alloys — Seamless, round copper tubes for water and gas in sanitary and
heating applications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
safety shut-off device
device for shutting off the fuel flow in order to avoid dangerous operating conditions in a plant
3.2
closure member
movable part of the control which shuts off the oil flow
3.3
breather hole
orifice which allows atmospheric pressure to be maintained within a compartment of variable volume
3.4
external leak-tightness
leak-tightness of a oil-carrying compartment with respect to the atmosphere
3.5
internal leak-tightness
leak-tightness of the closure member (in the closed position) sealing an oil-carrying compartment with respect
to another compartment or to the outlet of the control
3.6
inlet pressure
pressure at the inlet of the safety shut-off device
2 © ISO 2007 – All rights reserved

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
3.7
outlet pressure
pressure at the outlet of the safety shut-off device
3.8
maximum working pressure
maximum operating pressure
highest inlet pressure declared by the manufacturer at which the safety shut-off devices may be operated
3.9
minimum working pressure
lowest inlet pressure declared by the manufacturer at which the safety shut-off devices may be operated
3.10
flow rate
volume flowing through the safety shut-off devices per unit time
3.11
rated flow rate
air flow rate at a specified pressure difference declared by the manufacturer, corrected to standard conditions
3.12
maximum ambient temperature
highest temperature of the surrounding air declared by the manufacturer at which the control may be operated
3.13
minimum ambient temperature
lowest temperature of the surrounding air declared by the manufacturer at which the control may be operated
3.14
mounting position
position declared by the manufacturer for mounting the safety shut-off devices
3.15
nominal size
DN
numerical designation of size, for reference purposes, loosely related to manufacturing dimensions, common
to all components in a piping system
NOTE The abbreviation DN stands for diamètre nominal, in French.
3.16
nominal pressure
PN
numerical designation of pressure for reference purposes, related to the maximum working pressure, common
to all components in a piping system
NOTE The abbreviation PN stands for pression nominale, in French.
3.17
differential pressure
difference between the inlet and outlet pressures
3.18
fast-closing device
safety shut-off device with a predetermined time for the closing process
3.19
response times
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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
3.19.1
opening time
time from the beginning until the end of the change in position of the closure member from the closed to the
open position
See Figure 1.
NOTE See also 3.13 of ISO 23551-1:2006.

Key
1 delay time
2 opening time
a
open
b
closed
c
signal for opening
d
start of period of change in position
e
end of period of change in position
Figure 1 — Response time of closure member during opening
3.19.2
closing time
time from the beginning until the end of the change in position of the closure member from the open to the
closed position
See Figure 2.
NOTE See also 3.14 of ISO 23551-1:2006.

Key
1 delay time
2 closing time
a
open
b
closed
c
signal for closing
d
start of period of change in position
e
end of period of change in position
Figure 2 — Response time of closure member during closing
4 © ISO 2007 – All rights reserved

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
3.19.3
delay time
〈opening〉 interval between the signal to open and the point at which the closure member no longer maintains
the required tightness according to 7.2.1.2
See Figure 1.
NOTE See also 3.15 of ISO 23551-1:2006.
3.19.4
delay time
〈closure〉 the interval between the signal to close and the start of change in position of the closure member
See Figure 2.
3.20
opening force
force which effects the opening of the safety shut-off device
3.21
closing force
force which effects the closing of the closure member in the case of failure or interruption of the externally
applied actuating energy, such as spring force, independent of any force provided by fuel oil pressure
3.22
frictional force
largest force required to move the actuating mechanism and the closure member from the open position to the
closed position with the closing force removed, independent of any force provided by fuel oil pressure
NOTE Adapted from 3.10 of ISO 23551-1:2006.
3.23
opening [closing] characteristics
curve representing the movement of the closure member against time on opening [closing]
3.24
actuator
part effecting the movement of the closure member
EXAMPLE Valve disc.
3.25
auxiliary medium
medium used for actuating the moving parts of the system (pneumatic or hydraulic)
3.26
auxiliary medium pressure
pressure exerted by the auxiliary medium during actuation of the moving parts
3.27
direct-flow valve
valve in which the medium, in the valve seat, flows in the direction of the closure member for shutting off the
flow
© ISO 2007 – All rights reserved 5

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
4 Classification
4.1 Classes of shut-off device
4.1.1 According to the method of operation
The following three types are in this class:
a) safety shut-off device which is opened by hand, held open by auxiliary energy and closed by interruption
or failure of the auxiliary energy;
b) safety shut-off device according to a), which may, however, also be closed by hand;
c) safety shut-off device which is opened and held open by auxiliary energy and closed by interruption or
failure of the auxiliary energy.
4.1.2 According to the installation
The following two types are in this class:
a) for indoor use;
b) for outdoor use.
4.2 Control groups
Controls are grouped according to the bending stress which is specified for testing (see 7.3).
a) Group 1 controls
Controls for use in an appliance or installation where they are not subjected to bending stresses imposed
by installation pipework (e.g. safety shut-off device being a part of the pump).
b) Group 2 controls
Controls for use in any situation, either internal or external to the appliance, typically without support.
NOTE Controls which meet the requirements of a Group 2 control also meet the requirements of a Group 1 control.
5 Test conditions
Tests shall be carried out at an ambient temperature of (20 ± 5) °C, unless otherwise specified.
Tests shall be carried out in the mounting position declared by the manufacturer. If there are several mounting
positions, tests shall be carried out in the least favourable position.
If no specific methods of test are given, conformity with these requirements shall be verified by inspection
and/or measurement.
6 Construction
6.1 General
Safety shut-off devices shall be designed, manufactured and assembled so that the various functions operate
correctly when installed and used according to the manufacturer’s instructions.
6 © ISO 2007 – All rights reserved

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
All pressurized parts of a control shall withstand the mechanical and thermal stresses to which they are
subjected without any deformation affecting safety.
When reference is made in this part of ISO 23553 to ISO 23550, the word “gas” shall be replaced by “oil”.
6.2 Construction requirements
6.2.1 Appearance
The requirements in subclause 6.2.1 of ISO 23550:2004 apply.
6.2.2 Holes
The requirements in subclause 6.2.2 of ISO 23550:2004 apply.
6.2.3 Breather holes
The requirements in subclause 6.2.3 of ISO 23550:2004 do not apply.
6.2.4 Screwed fastenings
The requirements in subclause 6.2.4 of ISO 23550:2004 apply.
6.2.5 Jointing
The requirements in subclause 6.2.5 of ISO 23550:2004 apply.
6.2.6 Moving parts
The requirements in subclause 6.2.6 of ISO 23550:2004 apply.
6.2.7 Sealing caps
The requirements in subclause 6.2.7 of ISO 23550:2004 do not apply.
6.2.8 Dismantling and reassembling for servicing and/or adjustment
Parts which are intended to be dismantled for servicing or adjustment shall be capable of being dismantled
and reassembled using commonly available tools. They shall be constructed or marked in such a way that
incorrect assembly is impossible when following the manufacturer’s instructions.
Closure parts, including those of measuring and testing points, which can be dismantled for servicing or
adjustment, shall be constructed such that leak-tightness is achieved by mechanical means (e.g. metal-to-
metal joints, O-rings) without using jointing compounds such as liquids, pastes or tapes.
6.2.9 Auxiliary channels
Blockage of auxiliary channels and orifices shall not adversely affect the operation of the control, otherwise
they shall be protected against blockage by suitable means.
6.2.10 Resistance against pressure
The components of safety shut-off devices for fuel oil shall be designed for pressures of 1,5 times the system
design pressure, while the safety shut-off device is in the open position, and where the operating pressure has
been adjusted to the maximum permissible value.
The mechanical strength for devices above PN 16 or above DN 80 shall be proven.
© ISO 2007 – All rights reserved 7

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SIST EN ISO 23553-1:2009
ISO 23553-1:2007(E)
6.2.11 Manually adjustable packing glands
Manually adjustable packing glands are not permitted.
6.2.12 Non-metallic sealing materials
Non-metallic sealing materials in contact with the fuel shall be heat-resistant within the temperature range
indicated by the manufacturer and at least from 0 °C to 60 °C.
6.2.13 Connections
The connections shall be designed in such a way that the safety shut-off devices can be installed in the fuel
lines by welding, brazing, with flanges using suitable gaskets, or by threads.
Threaded connections shall be designed in such a way that a tight joint can be achieved without the use of
hemp or sealing tape.
6.3 Materials
6.3.1 General material requirements
The quality of materials, the dimensions used and the method of assembling the various parts shall be such
that construction and performance characteristics are safe. Performance characteristics shall not alter
significantly over a reasonable lifetime when installed and used according to the manufacturer’s instructions.
Under these circumstances, all components shall withstand any mechanical, chemical and thermal conditions
to which they may be subjected during service.
6.3.2 Housing
6.3.2.1 Housing design
Parts of the housing which directly or indirectly separate an oil-carrying compartment from atmosphere shall
either
⎯ be made from metallic materials, or
⎯ on removal or fracture of non-metallic parts (other than O-rings, gaskets, seals and the sealing part of
3 –1
diaphragms), air leakage rate at the maximum working pressure shall be no greater than 30 dm ⋅ h .
6.3.2.2 Test for leakage of housing after removal of non-metallic parts
Remove all non-metallic parts of the housing which separate the oil-carrying compartment from the
atmosphere (excluding O-rings, seals, gaskets and the sealing part of diaphragms). Any breather holes shall
be blocked. Pressurize the inlet and outlet(s) of the control to the maximum working pressure and measure
the leakage rate.
3 –1
Air leakage rate at the maximum working pressure shall be no greater than 30 dm ⋅ h .
6.3.3 Components generating or transmitting the closure force
6.3.3.1 Closure springs
Closure springs shall be calculated and designed in such a way as to withstand oscillating loads and at least
6
10 operations.
If a satisfactory calculation cannot be submitted to the test laboratory, the springs shall be subjected to an
6
endurance test of 2 × 10 operations under normal operating conditions.
8 © ISO 2007 – All rights reserved

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Varnostne in nadzorne naprave za oljne gorilnike in aparate na olje - Posebne zahteve - 1. del: Varnostno zaporne naprave za oljne gorilnike (ISO 23553-1:2007)Dispositifs de commande et de sécurité pour brûleurs à fioul et pour appareils à fioul - Exigences particulières - Partie 1: Dispositifs de coupure pour brûleurs à fioul (ISO 23553-1:2007)Safety and control devices for oil burners and oil-burning appliances - Particular requirements - Part 1: Shut-off devices for oil burners (ISO 23553-1:2007)27.060.10JRULYRLiquid and solid fuel burnersICS:Ta slovenski standard je istoveten z:prEN ISO 23553-1kSIST prEN ISO 23553-1:2009en01-januar-2009kSIST prEN ISO 23553-1:2009SLOVENSKI
STANDARD



kSIST prEN ISO 23553-1:2009



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMFINAL DRAFTprEN ISO 23553-1November 2008ICS 27.060.10Will supersede EN 264:1991
English VersionSafety and control devices for oil burners and oil-burningappliances - Particular requirements - Part 1: Shut-off devicesfor oil burners (ISO 23553-1:2007)Dispositifs de commande et de sécurité pour brûleurs àfioul et pour appareils à fioul - Exigences particulières -Partie 1: Dispositifs de coupure pour brûleurs à fioul (ISO23553-1:2007)This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the TechnicalCommittee CEN/TC 47.If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations whichstipulate the conditions for giving this European Standard the status of a national standard without any alteration.This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other languagemade by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has thesame status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice andshall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. prEN ISO 23553-1:2008: EkSIST prEN ISO 23553-1:2009



prEN ISO 23553-1:2008 (E) 2 Contents Page Foreword.3
kSIST prEN ISO 23553-1:2009



prEN ISO 23553-1:2008 (E) 3 Foreword The text of ISO 23553-1:2007 has been prepared by Technical Committee ISO/TC 161 “Control and safety devices for non-industrial gas-fired appliances and systems - STAND- BY” of the International Organization for Standardization (ISO) and has been taken over as prEN ISO 23553-1:2008 by Technical Committee CEN/TC 47 “Atomizing oil burners and their components - Function - Safety - Testing” the secretariat of which is held by DIN. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN 264:1991. Endorsement notice The text of ISO 23553-1:2007 has been approved by CEN as a prEN ISO 23553-1:2008 without any modification.
kSIST prEN ISO 23553-1:2009



kSIST prEN ISO 23553-1:2009



Reference numberISO 23553-1:2007(E)© ISO 2007
INTERNATIONAL STANDARD ISO23553-1First edition2007-09-15Safety and control devices for oil burners and oil-burning appliances — Particular requirements — Part 1: Shut-off devices for oil burners Dispositifs de commande et de sécurité pour brûleurs à fioul et pour appareils à fioul — Exigences particulières — Partie 1: Dispositifs de coupure pour brûleurs à fioul
kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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ISO 2007 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.
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www.iso.org Published in Switzerland
ii © ISO 2007 – All rights reserved
kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) © ISO 2007 – All rights reserved iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.2 4 Classification.6 4.1 Classes of shut-off device.6 4.2 Control groups.6 5 Test conditions.6 6 Construction.6 6.1 General.6 6.2 Construction requirements.7 6.3 Materials.8 6.4 Oil connections.10 6.5 EMC and electrical requirements.11 7 Performance.12 7.1 General.12 7.2 Leak-tightness.12 7.3 Torsion and bending.13 7.4 Flow capacity.14 7.5 Durability.14 7.6 Functional requirements.15 7.7 Endurance.15 8 EMC test.15 9 Marking, installation and operating instructions.16 9.1 Marking.16 9.2 Installation and operating instructions.17 Annex A (normative)
Regional specific requirements for Japan.18 Bibliography.20
kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) iv © ISO 2007 – All rights reserved 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 23553-1 was prepared by Technical Committee ISO/TC 161, Control and protective devices for gas and oil burners and gas and oil burning appliances. ISO 23553 consists of the following parts, under the general title Safety and control devices for oil burners and oil-burning appliances — Particular requirements: ⎯ Part 1: Shut-off devices for oil burners
kSIST prEN ISO 23553-1:2009



INTERNATIONAL STANDARD ISO 23553-1:2007(E) © ISO 2007 – All rights reserved 1Safety and control devices for oil burners and oil-burning appliances — Particular requirements — Part 1: Shut-off devices for oil burners 1 Scope This part of ISO 23553 specifies safety, constructional and performance requirements, and testing of safety shut-off devices, for liquid fuels. This part of ISO 23553 covers type testing only. It applies to safety shut-off devices which: ⎯ are designed as e.g. automatic valves or fast-closing devices; ⎯ are used in combustion plants to interrupt the flow of liquid fuels with or without delay on closing and with or without delay on opening; ⎯ are for use with fuel oils; NOTE For other liquid fuels, additional test methods can be agreed between the manufacturer and the test authority. ⎯ form part of a device having other function(s), such as oil pumps. In this case the test methods apply to those parts or components of the device forming the safety shut-off device, i.e. those parts which are necessary for the closing function; ⎯ have declared maximum working pressures up to and including 5 000 kPa, for use on burners or in appliances using liquid fuels; ⎯ are directly or indirectly operated electrically or by mechanical or hydraulic means; ⎯ are fitted with or without closed-position indicator switches. The methods of test given in this part of ISO 23553 are intended for product type testing. 2 Normative references The following referenced documents are indispensable for the application 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 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) 2 © ISO 2007 – All rights reserved ISO 1817:2005, Rubber, vulcanized — Determination of the effect of liquids ISO 7005-1, Pipe flanges — Part 1: Steel flanges for industrial and general service piping systems ISO 7005-2, Metallic flanges — Part 2: Cast iron flanges ISO 7005-3, Metallic flanges — Part 3: Copper alloy and composite flanges ISO 23550:2004, Safety and control devices for gas burners and gas-burning appliances — General requirements ISO 23551-1:2006, Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 1: Automatic valves IEC 60529:2001, Degrees of protection provided by enclosures (IP Code) IEC 60534-1, Industrial-process control valves — Part 1: Control valve terminology and general considerations IEC 60534-2-3, Industrial-process control valves — Part 2-3: Flow capacity — Test procedures IEC 60730-1:1999, Automatic electrical controls for household and similar use — Part 1: General requirements EN 1057, Copper and copper alloys — Seamless, round copper tubes for water and gas in sanitary and heating applications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 safety shut-off device device for shutting off the fuel flow in order to avoid dangerous operating conditions in a plant 3.2 closure member movable part of the control which shuts off the oil flow 3.3 breather hole orifice which allows atmospheric pressure to be maintained within a compartment of variable volume 3.4 external leak-tightness leak-tightness of a oil-carrying compartment with respect to the atmosphere 3.5 internal leak-tightness leak-tightness of the closure member (in the closed position) sealing an oil-carrying compartment with respect to another compartment or to the outlet of the control 3.6 inlet pressure pressure at the inlet of the safety shut-off device kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) © ISO 2007 – All rights reserved 33.7 outlet pressure pressure at the outlet of the safety shut-off device 3.8 maximum working pressure maximum operating pressure highest inlet pressure declared by the manufacturer at which the safety shut-off devices may be operated 3.9 minimum working pressure lowest inlet pressure declared by the manufacturer at which the safety shut-off devices may be operated 3.10 flow rate volume flowing through the safety shut-off devices per unit time 3.11 rated flow rate air flow rate at a specified pressure difference declared by the manufacturer, corrected to standard conditions 3.12 maximum ambient temperature highest temperature of the surrounding air declared by the manufacturer at which the control may be operated 3.13 minimum ambient temperature lowest temperature of the surrounding air declared by the manufacturer at which the control may be operated 3.14 mounting position position declared by the manufacturer for mounting the safety shut-off devices 3.15 nominal size DN numerical designation of size, for reference purposes, loosely related to manufacturing dimensions, common to all components in a piping system NOTE The abbreviation DN stands for diamètre nominal, in French. 3.16 nominal pressure PN numerical designation of pressure for reference purposes, related to the maximum working pressure, common to all components in a piping system NOTE The abbreviation PN stands for pression nominale, in French. 3.17 differential pressure difference between the inlet and outlet pressures 3.18 fast-closing device safety shut-off device with a predetermined time for the closing process 3.19 response times kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) 4 © ISO 2007 – All rights reserved 3.19.1 opening time time from the beginning until the end of the change in position of the closure member from the closed to the open position See Figure 1. NOTE See also 3.13 of ISO 23551-1:2006.
Key 1 delay time 2 opening time a open b closed c signal for opening d start of period of change in position e end of period of change in position Figure 1 — Response time of closure member during opening 3.19.2 closing time time from the beginning until the end of the change in position of the closure member from the open to the closed position See Figure 2. NOTE See also 3.14 of ISO 23551-1:2006.
Key 1 delay time 2 closing time a open b closed c signal for closing d start of period of change in position e end of period of change in position Figure 2 — Response time of closure member during closing kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) © ISO 2007 – All rights reserved 53.19.3 delay time 〈opening〉 interval between the signal to open and the point at which the closure member no longer maintains the required tightness according to 7.2.1.2 See Figure 1. NOTE See also 3.15 of ISO 23551-1:2006. 3.19.4 delay time 〈closure〉 the interval between the signal to close and the start of change in position of the closure member See Figure 2. 3.20 opening force force which effects the opening of the safety shut-off device 3.21 closing force force which effects the closing of the closure member in the case of failure or interruption of the externally applied actuating energy, such as spring force, independent of any force provided by fuel oil pressure 3.22 frictional force largest force required to move the actuating mechanism and the closure member from the open position to the closed position with the closing force removed, independent of any force provided by fuel oil pressure NOTE Adapted from 3.10 of ISO 23551-1:2006. 3.23 opening [closing] characteristics curve representing the movement of the closure member against time on opening [closing] 3.24 actuator part effecting the movement of the closure member EXAMPLE Valve disc. 3.25 auxiliary medium medium used for actuating the moving parts of the system (pneumatic or hydraulic) 3.26 auxiliary medium pressure pressure exerted by the auxiliary medium during actuation of the moving parts 3.27 direct-flow valve valve in which the medium, in the valve seat, flows in the direction of the closure member for shutting off the flow kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) 6 © ISO 2007 – All rights reserved 4 Classification 4.1 Classes of shut-off device 4.1.1 According to the method of operation The following three types are in this class: a) safety shut-off device which is opened by hand, held open by auxiliary energy and closed by interruption or failure of the auxiliary energy; b) safety shut-off device according to a), which may, however, also be closed by hand; c) safety shut-off device which is opened and held open by auxiliary energy and closed by interruption or failure of the auxiliary energy. 4.1.2 According to the installation The following two types are in this class: a) for indoor use; b) for outdoor use. 4.2 Control groups Controls are grouped according to the bending stress which is specified for testing (see 7.3). a) Group 1 controls Controls for use in an appliance or installation where they are not subjected to bending stresses imposed by installation pipework (e.g. safety shut-off device being a part of the pump). b) Group 2 controls Controls for use in any situation, either internal or external to the appliance, typically without support. NOTE Controls which meet the requirements of a Group 2 control also meet the requirements of a Group 1 control. 5 Test conditions Tests shall be carried out at an ambient temperature of (20 ± 5) °C, unless otherwise specified. Tests shall be carried out in the mounting position declared by the manufacturer. If there are several mounting positions, tests shall be carried out in the least favourable position. If no specific methods of test are given, conformity with these requirements shall be verified by inspection and/or measurement. 6 Construction 6.1 General Safety shut-off devices shall be designed, manufactured and assembled so that the various functions operate correctly when installed and used according to the manufacturer’s instructions. kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) © ISO 2007 – All rights reserved 7All pressurized parts of a control shall withstand the mechanical and thermal stresses to which they are subjected without any deformation affecting safety. When reference is made in this part of ISO 23553 to ISO 23550, the word “gas” shall be replaced by “oil”. 6.2 Construction requirements 6.2.1 Appearance The requirements in subclause 6.2.1 of ISO 23550:2004 apply. 6.2.2 Holes The requirements in subclause 6.2.2 of ISO 23550:2004 apply. 6.2.3 Breather holes The requirements in subclause 6.2.3 of ISO 23550:2004 do not apply. 6.2.4 Screwed fastenings The requirements in subclause 6.2.4 of ISO 23550:2004 apply. 6.2.5 Jointing The requirements in subclause 6.2.5 of ISO 23550:2004 apply. 6.2.6 Moving parts The requirements in subclause 6.2.6 of ISO 23550:2004 apply. 6.2.7 Sealing caps The requirements in subclause 6.2.7 of ISO 23550:2004 do not apply. 6.2.8 Dismantling and reassembling for servicing and/or adjustment Parts which are intended to be dismantled for servicing or adjustment shall be capable of being dismantled and reassembled using commonly available tools. They shall be constructed or marked in such a way that incorrect assembly is impossible when following the manufacturer’s instructions. Closure parts, including those of measuring and testing points, which can be dismantled for servicing or adjustment, shall be constructed such that leak-tightness is achieved by mechanical means (e.g. metal-to-metal joints, O-rings) without using jointing compounds such as liquids, pastes or tapes. 6.2.9 Auxiliary channels Blockage of auxiliary channels and orifices shall not adversely affect the operation of the control, otherwise they shall be protected against blockage by suitable means. 6.2.10 Resistance against pressure The components of safety shut-off devices for fuel oil shall be designed for pressures of 1,5 times the system design pressure, while the safety shut-off device is in the open position, and where the operating pressure has been adjusted to the maximum permissible value. The mechanical strength for devices above PN 16 or above DN 80 shall be proven. kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) 8 © ISO 2007 – All rights reserved 6.2.11 Manually adjustable packing glands Manually adjustable packing glands are not permitted. 6.2.12 Non-metallic sealing materials Non-metallic sealing materials in contact with the fuel shall be heat-resistant within the temperature range indicated by the manufacturer and at least from 0 °C to 60 °C. 6.2.13 Connections The connections shall be designed in such a way that the safety shut-off devices can be installed in the fuel lines by welding, brazing, with flanges using suitable gaskets, or by threads. Threaded connections shall be designed in such a way that a tight joint can be achieved without the use of hemp or sealing tape. 6.3 Materials 6.3.1 General material requirements The quality of materials, the dimensions used and the method of assembling the various parts shall be such that construction and performance characteristics are safe. Performance characteristics shall not alter significantly over a reasonable lifetime when installed and used according to the manufacturer’s instructions. Under these circumstances, all components shall withstand any mechanical, chemical and thermal conditions to which they may be subjected during service. 6.3.2 Housing 6.3.2.1 Housing design Parts of the housing which directly or indirectly separate an oil-carrying compartment from atmosphere shall either ⎯ be made from metallic materials, or ⎯ on removal or fracture of non-metallic parts (other than O-rings, gaskets, seals and the sealing part of diaphragms), air leakage rate at the maximum working pressure shall be no greater than 30 dm3 ⋅ h–1. 6.3.2.2 Test for leakage of housing after removal of non-metallic parts Remove all non-metallic parts of the housing which separate the oil-carrying compartment from the atmosphere (excluding O-rings, seals, gaskets and the sealing part of diaphragms). Any breather holes shall be blocked. Pressurize the inlet and outlet(s) of the control to the maximum working pressure and measure the leakage rate. Air leakage rate at the maximum working pressure shall be no greater than 30 dm3 ⋅ h–1. 6.3.3 Components generating or transmitting the closure force 6.3.3.1 Closure springs Closure springs shall be calculated and designed in such a way as to withstand oscillating loads and at least 106 operations. If a satisfactory calculation cannot be submitted to the test laboratory, the springs shall be subjected to an endurance test of 2 × 106 operations under normal operating conditions. kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) © ISO 2007 – All rights reserved 96.3.3.2 Components other than springs With the exception of closure springs (see 6.3.3.1), components generating or transmitting the closure force, including components of the actuator, shall be designed such that the breaking load is five times the maximum possible operating load. Deviations from this requirement are acceptable if the function is not rendered unsafe upon fracture of the component and if tightness is maintained. 6.3.4 Resistance to corrosion and surface protection The requirements in subclause 6.3.4 of ISO 23550:2004 do not apply. 6.3.5 Impregnation If impregnation is part of the manufacturing process for parts which effect the tightness of the safety shut-off device, it shall be carried out using an appropriate procedure (e.g. vacuum or internal pressure, using appropriate sealing materials). 6.3.6 Seals for glands for moving parts Seals for moving parts which pass through the body to atmosphere and seals for closure members shall be made only of solid, mechanically stable materials which do not deform permanently. Sealing paste shall not be used. Manually adjustable packing glands shall not be used for sealing moving parts. Bellows shall not be used as the sole sealing element against atmosphere. NOTE An adjustable gland set by the manufacturer and protected against further adjustment is considered to be non-adjustable. 6.3.7 Actuators 6.3.7.1 Electromagnetic actuators Electromagnetic actuators shall remain functional in the range of 85 % to 110 % of the rated voltage. The actuators shall be designed in such a way that, after an uninterrupted operation of more than 350 h at a rated voltage of 100 %, and at the maximum permissible ambient temperature, the force of retention (e.g. due to friction or remanence) does not prevent that a) the automatic closing of the closure member shall occur at a voltage not below 30 % of the rated voltage, or b) for direct-flow valves, the automatic closing of the closure member shall occur at a voltage not below 15 % of the rated voltage if, in addition a force of at least 0,4 N per mm length of the sealing edge up to a nominal size DN 4 and over DN 4 a force of at least (20 + 5 d) × 10−2 N per mm edge length is ensured (where d is the diameter of the valve seat). For electrically operated control valves (pilot valves), automatic closure shall occur at a voltage not below 15 % of the rated voltage. 6.3.7.2 Pneumatic actuators Pneumatic actuators shall open and close the safety shut-off devices correctly at the highest operating pressure while at the lowest permissible auxiliary medium pressure. The necessary control pipes or nozzles shall be chosen such that their function is guaranteed. Control devices for pneumatic actuators, e.g. electromagnetic valves, shall be treated as part of the fast-closing device according to this part of ISO 23553. Control valves may be exchanged without further testing, if the replacement valves have been previously approved as part of a type test to this part of ISO 23553. kSIST prEN ISO 23553-1:2009



ISO 23553-1:2007(E) 10 © ISO 2007 – All rights reserved 6.3.7.3 Hydraulic actuators Hydraulic actuators shall be in accordance with 6.3.7.2, as applicable. 6.4 Oil connections 6.4.1 Making connections The control housing shall be designed to accept commonly available tools in makin
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