EN ISO 23553-1:2014

SLOVENSKI STANDARD
01-julij-2014
1DGRPHãþD
SIST EN ISO 23553-1:2009
Varnostne in nadzorne naprave za oljne gorilnike in aparate na olje - Posebne
zahteve - 1. del: Varnostno zaporne naprave za oljne gorilnike (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)
Sicherheits-, Regel- und Steuereinrichtungen für Ölbrenner und Öl verbrennende Geräte
- Spezielle Anforderungen - Teil 1: Absperreinrichtungen für Ölbrenner (ISO 23553-
1:2014)
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
23553-1:2014)
Ta slovenski standard je istoveten z: EN ISO 23553-1:2014
ICS:
27.060.10 *RULOQLNLQDWHNRþHLQWUGR Liquid and solid fuel burners
JRULYR
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 23553-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 27.060.10 Supersedes EN ISO 23553-1:2009
English Version
Safety and control devices for oil burners and oil-burning
appliances - Particular requirements - Part 1: Automatic and
semi-automatic valves (ISO 23553-1:2014)
Dispositifs de commande et de sécurité pour brûleurs à Sicherheits-, Regel- und Steuereinrichtungen für Ölbrenner
combustible liquide et pour appareils à combustible liquide - und Öl verbrennende Geräte - Spezielle Anforderungen -
Exigences particulières - Partie 1: Robinets automatiques et Teil 1: Automatische und halbautomatische Ventile (ISO
semi-automatiques (ISO 23553-1:2014) 23553-1:2014)
This European Standard was approved by CEN on 9 April 2014.

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, 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
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23553-1:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 23553-1:2014) has been prepared by Technical Committee ISO/TC 161 “Control and
protective devices for gas and/or oil burners and appliances” in collaboration with 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 November 2014, and conflicting national standards shall be withdrawn
at the latest by November 2014.
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 ISO 23553-1:2009.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 23553-1:2014 has been approved by CEN as EN ISO 23553-1:2014 without any modification.
INTERNATIONAL ISO
STANDARD 23553-1
Second edition
2014-05-15
Safety and control devices for oil
burners and oil-burning appliances —
Particular requirements —
Part 1:
Automatic and semi-automatic valves
Dispositifs de commande et de sécurité pour brûleurs à combustible
liquide et pour appareils à combustible liquide — Exigences
particulières —
Partie 1: Robinets automatiques et semi-automatiques
Reference number
ISO 23553-1:2014(E)
©
ISO 2014
ISO 23553-1:2014(E)
© ISO 2014
All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 23553-1:2014(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 4
4 Classification . 6
4.1 Classes of control . 6
4.2 Groups of control . 6
5 Test conditions . 6
6 Construction . 7
6.1 General . 7
6.2 Construction requirements . 7
6.3 Materials . 9
6.4 Oil connections.10
6.101 Welded connections .12
6.102 Indicator .12
7 Performance .12
7.1 General .12
7.2 Leak-tightness.12
7.3 Torsion and bending .14
7.4 Rated flow rate .15
7.5 Durability .15
7.6 Functional requirements .16
7.7 Endurance .17
8 EMC/Electrical requirements .18
8.1 Protection against environmental influences .18
8.2 Variations in supply voltage .19
8.3 Short-term voltage interruptions and drops .19
8.4 Variations in supply frequency .19
8.5 Surge immunity test .19
8.6 Electrical fast transient/burst .19
8.7 Immunity to conducted disturbances .19
8.8 Immunity to radiated fields .19
8.9 Electrostatic discharge immunity test .19
8.10 Test for immunity to power-frequency magnetic field .19
8.11 Electrical equipment .19
8.101 Electrical components .22
8.102 Ring wave .23
9 Marking, installation and operating instructions .24
9.1 Marking .24
9.2 Installation and operating instructions .24
9.3 Warning notice .25
Annex A (informative) Leak-tightness test — Volumetric method .26
Annex B (informative) Leak-tightness test — Pressure-loss method .27
Annex C (normative) Conversion of pressure loss into leakage rate .28
Annex D (normative) Test for immunity to power-frequency magnetic fields.29
Annex E (normative) Specific regional requirements in European countries .30
Annex F (normative) Specific regional requirements in Canada and USA .32
ISO 23553-1:2014(E)
Annex G (normative) Specific regional requirements in Japan .35
Bibliography .36
iv © ISO 2014 – All rights reserved

ISO 23553-1:2014(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.
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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 161, Control and protective devices for gas and/or
oil burners and appliances.
This second edition cancels and replaces the first edition (ISO 23553-1:2007), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 23553-1:2007/Cor1:2009).
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: Automatic and semi-automatic valves.
It should be noted that the following significant technical changes compared to the previous edition
have been incorporated in this part of ISO 23553:
a) change of the title from shut-off valves to automatic and semi-automatic valves;
b) extension of the scope to automatic and semi-automatic valves;
c) introduction of further classifications for valves;
d) inclusion of references to the general electrical requirements of IEC 60730-1:2010;
e) integration of non electrical requirements from IEC 60730-2-19;
f) integration of electrical requirements from IEC 60730-2-19 which are unalterable for valves;
g) inclusion of the subclause 7.7.103 “Test of endurance of electrically operated valves”;
h) change of endurance cycles for valves up to DN 15;
i) extended limits of internal leakage for valves ≤ DN 50;
j) test of closing function updated.
ISO 23553-1:2014(E)
Introduction
This part of ISO 23553 is designed to be used in combination with ISO 23550. This part together with
ISO 23550 establishes the full requirements as they apply to the product covered by this part of ISO 23553.
This part of ISO 23553 adapts ISO 23550, where needed, by stating “with the following modification”,
“with the following addition”, “is replaced by the following” or “is not applicable,” in the corresponding
clause.
In order to identify specific requirements that are particular to this part of ISO 23553, that are not
already covered by ISO 23550, this document may contain clauses or subclauses that are additional to
the structure of ISO 23550. These clauses are numbered starting from 101 or, in the case of an Annex,
are designated AA, BB, CC etc.
In an attempt to develop a fully International Standard, it has been necessary to take into consideration
the differing requirements resulting from practical experience and installation practices in various
regions of the world and to recognize the variation in basic infrastructure associated with oil controls
and appliances, some of which are addressed in Annexes E, F and G. This part of ISO 23553 intends to
provide a basic framework of requirements that recognizes these differences.
vi © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 23553-1:2014(E)
Safety and control devices for oil burners and oil-burning
appliances — Particular requirements —
Part 1:
Automatic and semi-automatic valves
IMPORTANT — When reference is made in this part of — ISO 23553 to ISO 23550, the word “gas”
shall be replaced by “oil” as appropriate. The current base standard, ISO 23550:2011, focuses on
gas controls only. It is, however, the intention to revise the base standard in such a fashion that
both, gas and oil product standards can be used in conjunction with the base standard. Attention
is drawn especially to the following subclauses: 6.4, 7.4 and 7.5.
1 Scope
This part of ISO 23553 specifies safety, constructional and performance requirements and testing of
automatic and semi-automatic valves for oil.
It applies to automatic and semi-automatic valves which are:
— normally closed;
— used in combustion plants to interrupt the oil flow with or without delay on closing;
— for use with oil types (e.g. middle distillate fuel oil, crude oil, heavy fuel oil or kerosene) without
gasoline;
NOTE 1 For other oil types (e.g. oil emulsions), additional test methods can be agreed between the manufacturer
and the test authority.
NOTE 2 Oil types from petroleum refining processes are classified ISO-F-D in ISO 8216-99 and 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 automatic and semi-automatic valves, i.e. those parts which are necessary
for the closing function;
— for use on burners or in appliances using oil;
— directly or indirectly operated, electrically or by mechanical or hydraulic means;
— fitted with or without closed-position indicator switches.
This part of ISO 23553 covers type testing only.
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 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
ISO 272, Fasteners — Hexagon products — Widths across flats
ISO 1179-1, Connections for general use and fluid power — Ports and stud ends with ISO 228-1 threads with
elastomeric or metal-to-metal sealing — Part 1: Threaded ports
ISO 23553-1:2014(E)
ISO 1179-2, Connections for general use and fluid power — Ports and stud ends with ISO 228-1 threads with
elastomeric or metal-to-metal sealing — Part 2: Heavy-duty (S series) and light-duty (L series) stud ends
with elastomeric sealing (type E)
ISO 1179-3, Connections for general use and fluid power — Ports and stud ends with ISO 228-1 threads with
elastomeric or metal-to-metal sealing — Part 3: Light-duty (L series) stud ends with sealing by O-ring with
retaining ring (types G and H)
ISO 1179-4, Connections for general use and fluid power — Ports and stud ends with ISO 228-1 threads with
elastomeric or metal-to-metal sealing — Part 4: Stud ends for general use only with metal-to-metal sealing
(type B)
ISO 3601-5, Fluid power systems — O-rings — Part 5: Specification of elastomeric materials for industrial
applications
ISO 6149-1, Connections for hydraulic fluid power and general use — Ports and stud ends with ISO 261
metric threads and O-ring sealing — Part 1: Ports with truncated housing for O-ring seal
ISO 6149-3, Connections for hydraulic fluid power and general use — Ports and stud ends with ISO 261
metric threads and O-ring sealing — Part 3: Dimensions, design, test methods and requirements for light-
duty (L series) stud ends
ISO/TR 7620, Rubber materials — Chemical resistance
ISO 8216-99, Petroleum products — Fuels (class F) — Classification — Part 99: General
ISO 8434-1, Metallic tube connections for fluid power and general use — Part 1: 24 degree cone connectors
ISO 8434-2, Metallic tube connections for fluid power and general use — Part 2: 37 degree flared connectors
ISO 8434-3, Metallic tube connections for fluid power and general use — Part 3: O-ring face seal connectors
ISO 8434-6, Metallic tube connections for fluid power and general use — Part 6: 60 degree cone connectors
with or without O-ring
ISO 9974-1, Connections for general use and fluid power — Ports and stud ends with ISO 261 threads with
elastomeric or metal-to-metal sealing — Part 1: Threaded ports
ISO 9974-3, Connections for general use and fluid power — Ports and stud ends with ISO 261 threads with
elastomeric or metal-to-metal sealing — Part 3: Stud ends with metal-to-metal sealing (type B)
ISO 23550:2011, Safety and control devices for gas burners and gas-burning appliances — General
requirements
ISO 23553, Safety and control devices for oil burners and oil-burning appliances — Particular requirements
ISO 23936-1, Petroleum, petrochemical and natural gas industries — Non-metallic materials in contact
with media related to oil and gas production — Part 1: Thermoplastics
ISO 23936-2, Petroleum, petrochemical and natural gas industries — Non-metallic materials in contact
with media related to oil and gas production — Part 2: Elastomers
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 60730-1:2010, 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
2 © ISO 2014 – All rights reserved

ISO 23553-1:2014(E)
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 2: Cast iron flanges
EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories PN
designated — Part 3: Copper alloy flanges
EN 1092-4, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 4: Aluminium alloy flanges
EN 1254-1, Copper and copper alloys — Plumbing fittings — Part 1: Fittings with ends for capillary soldering
or capillary brazing to copper tubes
EN 1254-2, Copper and copper alloys — Plumbing fittings — Part 2: Fittings with compression ends for use
with copper tubes
EN 1254-3, Copper and copper alloys — Plumbing fittings — Part 3: Fittings with compression ends for use
with plastics pipes
EN 1254-5, Copper and copper alloys — Plumbing fittings — Part 5: Fittings with short ends for capillary
brazing to copper tubes
EN 10226-1, Pipe threads where pressure tight joints are made on the threads — Part 1: Taper external
threads and parallel internal threads; Dimensions, tolerances and designation
EN 10226-2, Pipe threads where pressure tight joints are made on the threads — Part 2: Taper external
threads and taper internal threads - Dimensions, tolerances and designation
EN 10241, Steel threaded pipe fittings
EN 10242, Threaded pipe fitting in malleable cast iron
EN 10284, Malleable cast iron fittings with compression ends for polyethylene (PE) piping systems
EN 10305-1, Steel tubes for precision applications — Technical delivery conditions — Part 1: Seamless cold
drawn tubes
EN 10305-2, Steel tubes for precision applications — Technical delivery conditions — Part 2: Welded cold
drawn tubes
EN 10305-3, Steel tubes for precision applications — Technical delivery conditions — Part 3: Welded cold
sized tubes
EN 10305-4, Steel tubes for precision applications — Technical delivery conditions — Part 4: Seamless cold
drawn tubes for hydraulic and pneumatic power systems
EN 10305-6, Steel tubes for precision applications — Technical delivery conditions — Part 6: Welded cold
drawn tubes for hydraulic and pneumatic power systems
EN 12516 (all parts), Industrial valves — Shell design strength
EN 12627, Industrial valves — Butt welding ends for steels valves
EN 12760, Valves — Socket welding ends for steel valves
prEN 10344, Malleable cast iron fittings with compression ends for steel pipes
prEN 12514-4:2009, Parts for supply systems for consuming units with liquid fuels — Part 4: Safety
requirements and tests — Pipings and parts within pipelines
ANSI/ASME B 1.1, Unified inch screw threads (UN and UNR thread form)
ISO 23553-1:2014(E)
ANSI/ASME B1.20.1, Pipe threads, general purpose (inch)
ANSI/ASME B 16.1, Cast iron pipe flanges and flanged fittings, class 25, 125, 250 and 800
ANSI/ASME B 16.5, Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard
ANSI/SAE J 512, Automotive tube fittings
ANSI/SAE J 514, Hydraulic tube fittings
ASTM D 396, Standard Specification for Fuel Oils
NEMA 250, Enclosures for Electrical Equipment (1 000 V Maximum)
UL 50, Standard for Safety Enclosures for Electrical Equipment, Non-Environmental Considerations
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 23550:2011 and the following
apply.
3.101
valves
3.101.1
valve
device consisting essentially of a valve body, closure member, and actuator that controls the oil flow
Note 1 to entry: The actuator may be actuated by electrical or mechanical means.
Note 2 to entry: The actuation may be done by fuel pressure, electrical, hydraulic or pneumatic energy.
3.101.2
normally closed valve
nc
valve which is in closed position when no actuating energy is applied
3.101.3
automatic valve
normally closed valve that closes on removal of the actuating energy
3.101.4
semi-automatic valve
normally closed valve that is actuated manually and returns to the closed position upon removal of the
actuating energy
3.101.5
safety shut-off valve
normally closed valve, automatic or semi-automatic, that prevents the oil flow when de-energized
3.102
response times
3.102.1
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
Note 1 to entry: For illustration refer to Figure 1.
4 © ISO 2014 – All rights reserved

ISO 23553-1:2014(E)
Key
c
1 delay time signal for opening
d
2 opening time start of period of change in position
a e
open end of period of change in position
b
closed
Figure 1 — Response time of closure member during opening
3.102.2
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
Note 1 to entry: For illustration refer to Figure 2.
Key
c
1 delay time signal for closing
d
2 closing time start of period of change in position
a e
open end of period of change in position
b
closed
Figure 2 — Response time of closure member during closing
3.103
opening force
force which effects the opening of the automatic valve
3.104
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 oil pressure
ISO 23553-1:2014(E)
3.105
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 oil pressure
Note 1 to entry: Adapted from ISO 23551-1:2012, 3.109.
3.106
opening (closing) characteristics
curve representing the movement of the closure member against time on opening (closing)
3.107
actuator
part effecting the movement of the closure member
Note 1 to entry: Also media could effect the movement.
3.108
auxiliary medium
medium used for actuating the moving parts of the system (pneumatic or hydraulic)
3.109
auxiliary medium pressure
pressure exerted by the auxiliary medium during actuation of the moving parts
3.110
commercial / industrial valve
C/I Valve
a normally closed automatic or semi-automatic shut-off valve
3.111
control valve
valve which controls the hydraulic or pneumatic means supplied to the actuating mechanism
[SOURCE: ISO 23551-1:2012, 3.115]
4 Classification
4.1 Classes of control
Shall be according to ISO 23550:2011, 4.1.
4.2 Groups of control
Shall be according to ISO 23550:2011, 4.2 with the following modification:
Group 1 is not applicable.
5 Test conditions
Shall be according to ISO 23550:2011, Clause 5 with the following modification:
Controls which can be converted for use with another oil by exchanging components are additionally
tested with the conversion components.
6 © ISO 2014 – All rights reserved

ISO 23553-1:2014(E)
6 Construction
6.1 General
Shall be according to ISO 23550:2011, 6.1.
6.2 Construction requirements
6.2.1 Appearance
Shall be according to ISO 23550:2011, 6.2.1.
6.2.2 Holes
ISO 23550:2011, 6.2.2 shall be replaced by the following:
Holes for screws, pins, etc., which are used for the assembly of parts or used to install the valve shall not
penetrate oil passageways.
Holes necessary in manufacture which connect oil passageways to the atmosphere but which do
not affect the function of the valve shall be permanently sealed by metallic means. Suitable jointing
compounds may additionally be used.
6.2.3 Breather holes
ISO 23550:2011, 6.2.3 is replaced by 6.2.104.
6.2.4 Screwed fastenings
Shall be according to ISO 23550:2011, 6.2.4.
NOTE Specific regional requirements are given in Annex F.
6.2.5 Jointing
Shall be according to ISO 23550:2011, 6.2.5.
6.2.6 Moving parts
Shall be according to ISO 23550:2011, 6.2.6
6.2.7 Sealing caps
Shall be according to ISO 23550:2011, 6.2.7.
6.2.8 Dismantling and reassembling for servicing and/or adjustment
Shall be according to ISO 23550:2011, 6.2.8 with the following addition:
6.2.8.101 General
Adjustment means shall be secured by means providing protection against access by uninstructed
persons or shall be declared as requiring such protection in the application.
NOTE For example, these means may:
a) be sealed with a material suitable for the temperature range of the valve such that tampering is
apparent; or
ISO 23553-1:2014(E)
b) be accessible only with the use of special purpose tools; or
c) be accompanied by instructions requiring the equipment manufacturer to mount the valve such that
the adjustment means is inaccessible.
6.2.8.102 Test of adjustment means
Compliance is checked by inspection. Where sealing is used, inspection is done before and after the
endurance tests.
6.2.8.103 Maintaining of adjustments
Suitable means for maintaining all adjustments shall be provided.
NOTE Lock nuts or adjusting nuts held by springs or compression are acceptable unless their adjustment can
be accidentally disturbed.
6.2.8.104 Field adjustments
Necessary field adjustments shall be capped or otherwise protected in such a manner as to resist
tampering or accidental change.
6.2.8.105 Dismantling
If a valve can be partially or completely disassembled without the use of special tools, construction shall
be such that either:
a) parts of the valve cannot be readily reassembled improperly in a manner which could result in an
unsafe condition, or
b) threaded fasteners are covered with a sealing means to discourage disassembly. The sealing means
shall be suitable for exposure to the minimum and maximum ambient temperatures declared for
the valve.
This subclause does not apply to parts of a valve intended for field replacement or servicing.
6.2.9 Auxiliary channels
Shall be according to ISO 23550:2011, 6.2.9.
6.2.101 Resistance against pressure
Oil valves shall be designed for pressures of 1,5 times the maximum working pressure. The mechanical
strength for devices above PN 16 or above DN 80 shall be proven.
Manually adjustable packing glands are not permitted.
6.2.102 Non-metallic sealing materials
Non-metallic sealing materials (thermoplastics, elastomers, thermosetting plastics, fibre-reinforced
plastics, etc.) in contact with the oil shall be resistant against those oil types they are in use with and
heat-resistant for the maximum oil temperature as declared by the manufacturer.
NOTE For the selection and evaluation of non-metallic materials ISO 3601-5, ISO 23936-1, ISO 23936-2 or
ISO/TR 7620 can be used.
6.2.103 Connections
The connections shall be designed in such a way that the valves can be installed in the oil lines by
welding, brazing, with flanges using suitable gasket, union joints, compression fittings, or by threads.
8 © ISO 2014 – All rights reserved

ISO 23553-1:2014(E)
6.2.104 Flexible diaphragm, bellows, or similar construction
Valves which utilize a flexible diaphragm, bellows, or similar construction as the only oil seal against
atmospheric pressure, shall have the atmospheric side enclosed in a casing to limit external leakage in
the event of diaphragm or bellows rupture or have provision for connection of pipe or tubing to carry
away the occurring leakage.
Compliance is checked by rupturing the diaphragm or bellows and measuring the leakage according to
7.2.1.101. During this test the connection ports for pipes or tubing shall be blocked.
Leakage through an unthreaded vent opening is included. Leakage through a vent opening which has
provision for connection of pipe or tubing is not included.
If the valve employs provisions for pipe or tubing as measure to protect the environment from leakage
occurring because of a damaged flexible diaphragm, bellows or similar, the installation of suitable pipe
or tubing shall be declared by the manufacturer.
6.3 Materials
6.3.1 General material requirements
Shall be according to ISO 23550:2011, 6.3.1.
6.3.2 Housing
6.3.2.1 Housing design
ISO 23550:2011, 6.3.2.1 is not applicable.
6.3.2.2 Test for leakage of housing after removal of non-metallic parts
ISO 23550:2011, 6.3.2.2 is not applicable.
6.3.3 Springs
ISO 23550:2011, 6.3.3 is replaced by the following:
6.3.3.101 Components generating or transmitting the closure force
6.3.3.101.1 Closure springs
Closure springs shall be calculated and designed in such a way as to withstand oscillating loads and at
least 10 operations.
If a satisfactory calculation cannot be submitted to the test laboratory, the springs shall be subjected to
an endurance test of 2 × 10 operations under normal operating conditions.
6.3.3.101.2 Parts other than springs
With the exception of closure springs (see 6.3.3.101.1), parts generating or transmitting the closure
force, including parts 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 part and if tightness is maintained.
6.3.4 Resistance to corrosion and surface protection
Shall be according to ISO 23550:2011, 6.3.4.
ISO 23553-1:2014(E)
6.3.5 Impregnation
Shall be according to ISO 23550:2011, 6.3.5.
6.3.6 Seals for glands for moving parts
Shall be according to ISO 23550:2011, 6.3.6.
6.3.101 Actuators
6.3.101.1 Electromagnetic actuators
Electromagnetic actuators shall remain functional in the range of 85 % to 110 % of the rated voltage.
NOTE Specific regional requirements are given in Annex F and ISO 23550:2011, G.7.1.
The actuators shall be designed in such a way that, after an uninterrupted operation of more than 24 h
at a rated voltage of 100 %, and at the minimum ambient temperature declared by the manufacturer, the
force of retention (e. g. due to friction or remanence) does not prevent that the automatic closing of the
closure member shall occur at a voltage not below 15 % of the rated voltage.
This test shall be repeated for 24 h at maximum ambient temperature.
For electrically operated control valves for hydraulic or pneumatic actuators, automatic closure shall
occur at a voltage not below 15 % of the rated voltage.
6.3.101.2 Hydraulic and pneumatic actuators
Hydraulic or pneumatic actuators shall open and close the automatic valves or close the semi-automatic
valves 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 valves may be exchanged without further testing, if the replacement valves have been previously
tested as part of a type test to this part of ISO 23553.
6.3.102 Enclosures
NOTE Specific regional requirements are given in F.6.3.102.
6.3.103 Extra low voltage terminals
NOTE Specific regional requirements are given in F.6.3.103.
6.4 Oil connections
6.4.1 Making connections
Shall be according to ISO 23550:2011, 6.4.1.
NOTE For flats for spanners of hexagon products, see ISO 272.
6.4.2 Connection sizes
Shall be according to ISO 23550:2011, 6.4.2.
6.4.3 Threads
Shall be according to ISO 23550:2011, 6.4.3 with the following addition:
10 © ISO 2014 – All rights reserved

ISO 23553-1:2014(E)
The manufacturer shall specifythe method of sealing between housing and pipe and shall provide the
gasket if the connection is a thread according to ISO 228-1.
E.g. for threaded joints are:
— port according to ISO 1179-1 for stud connectors according to ISO 1179-2;
— port according to ISO 1179-1 for stud connectors according to ISO 1179-3;
— port according to ISO 1179-1 for stud connectors according to ISO 1179-4;
— port according to ISO 1179-1 for stud connectors with sealing ring according to prEN 12514-4:2009,
Annex C;
— port according to ISO 9974-1 for stud connectors according to ISO 9974-3;
— port according to ISO 6149-1 for stud connectors according to ISO 6149-3;
NOTE Specific regional requirements are given in Annex E and Annex F.
6.4.4 Union Joints
Shall be according to ISO 23550:2011, 6.4.4.
The manufacturer shall specify the method of sealing between housing and pipe and shall provide the
gasket if the connection is a thread according to ISO 228-1.
NOTE Specific regional requirements are given in Annex E and Annex F.
6.4.5 Flanges
Shall be according to ISO 23550:2011, 6.4.5 with the following addition:
C/I valves larger than DN 80 (3 inches) shall use flange connections.
NOTE Specific regional requirements are given in Annex E and in Annex F.
6.4.6 Compression fittings
ISO 23550:2011, 6.4.6 is replaced by the following:
Compression fittings shall be suitable for use with t
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