SIST EN 17450-3:2025

Fixed firefighting systems - Components for water mist systems - Part 3: Requirements and test methods for check valves

This document specifies the requirements and describes the test methods for check valves for water mist firefighting systems.
Check valves allow the passage in the direction of flow and they prevent flow in the reverse direction.
This document is applicable to check valves installed in the pipework of water mist firefighting systems.

Ortsfeste Brandbekämpfungsanlagen - Bauteile für Wassernebelsysteme – Teil 3: Anforderungen und Prüfverfahren für Rückschlagventile

Dieses Dokument legt die Anforderungen fest und beschreibt die Prüfverfahren für Rückschlagventile für Wassernebel-Brandbekämpfungsanlagen.
Rückschlagventile lassen den Durchfluss in Durchflussrichtung zu und verhindern den Durchfluss in der umgekehrten Richtung.
Dieses Dokument ist anwendbar für Rückschlagventile, die im Rohrleitungssystem von Wassernebel-Brand¬bekämpfungsanlagen eingebaut sind.

Installations fixes de lutte contre l’incendie - Composants pour systèmes à brouillard d’eau - Partie 3 : Exigences et méthodes d’essai pour les clapets anti-retour

Le présent document spécifie les exigences et décrit les méthodes d’essai relatives aux clapets anti-retour pour les installations de lutte contre l’incendie à brouillard d’eau.
Les clapets anti-retour permettent le passage dans le sens de l’écoulement et empêchent l’écoulement dans le sens inverse.
Le présent document est applicable aux clapets anti-retour installés dans les canalisations des installations de lutte contre l’incendie à brouillard d’eau.

Vgrajeni gasilni sistemi - Sestavni deli za sisteme s pršečo vodo - 3. del: Zahteve in preskusne metode za kontrolne ventile

Ta dokument določa zahteve in opisuje preskusne metode za kontrolne ventile gasilnih sistemov s pršečo vodo. Kontrolni ventili omogočajo prehod v smeri pretoka in preprečujejo pretok v obratni smeri. Ta dokument se uporablja za kontrolne ventile, nameščene v cevovodih gasilnih sistemov s pršečo vodo.

General Information

• Status: Published
• Public Enquiry End Date: 18-Sep-2024
• Publication Date: 13-May-2025
• ICS: 13.220.10 - Fire-fighting
• Technical Committee: POZ - Požarna varnost
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 17-Apr-2025
• Due Date: 22-Jun-2025
• Completion Date: 14-May-2025
• Ref Project: EN 17450-3:2025 - Fixed firefighting systems - Components for water mist systems - Part 3: Requirements and test methods for check valves

Overview

SIST EN 17450-3:2025 is a European standard developed by CEN that defines the requirements and test methods for check valves used in fixed firefighting water mist systems. Check valves are critical components that allow fluid to flow in one direction while preventing backflow in the reverse direction, ensuring the proper function and safety of water mist fire suppression installations. This standard applies specifically to check valves installed within the pipework of water mist firefighting systems.

By adhering to SIST EN 17450-3:2025, manufacturers and installers ensure that check valves meet strict performance criteria for durability, safety, and reliability in high-pressure firefighting environments.

Key Topics

• Design Requirements
  Materials used must be resistant to the water and environment they contact. Dimensions and threaded connections shall conform to international or applicable national standards. Manufacturer data and instructions are mandatory for installation and maintenance.

• Performance Criteria

  • Internal Pressure Resistance: Must withstand pressures up to 1.5 times the working pressure without deterioration.
  • Strength and Leak Resistance: Valves must endure strength tests and show leak rates not exceeding specified limits.
  • Functional Reliability: Check valves must fully open or close according to pressure requirements and maintain function after water cycling (3,000 cycles), corrosion exposure, and vibration testing.
  • Corrosion and Vibration Resistance: Valves must resist degradation from salt spray corrosion testing and operational vibrations without failure.

• Test Methods
  Details cover how to conduct internal pressure, strength, leak resistance, water cycling, functional operation, corrosion, and vibration tests. Water is the test medium under controlled temperature and pressures.

• Marking and Documentation
  Each valve must be permanently marked with key information such as manufacturer identification, model, working pressure, nominal size, mounting position, and flow direction. Comprehensive documentation covering installation, operation, maintenance, and compliance testing is required.

Applications

SIST EN 17450-3:2025 is essential for ensuring the reliability of check valves in water mist firefighting systems, which are widely used in residential, commercial, industrial, and transportation facilities for fire protection. The standard assists manufacturers in producing compliant components and helps system designers and installers select suitable check valves that guarantee effective fire suppression system performance.

Typical application benefits include:

• Preventing backflow that could damage system components or cause malfunction.
• Ensuring durability and continuous operation under harsh conditions, such as cycling pressures, corrosive environments, and vibrations.
• Enhancing safety and compliance within fixed fire protection installations.
• Facilitating regulatory approval and certification of water mist system components across Europe.

Related Standards

SIST EN 17450-3:2025 is part of a series on fixed firefighting water mist systems by CEN Technical Committee 191:

• EN 17450-1: Requirements and test methods for strainer and filter components (under preparation)
• EN 17450-2: Requirements and test methods for nozzles (under preparation)
• EN 17450-4: Requirements and test methods for control deluge valves and actuators (planned)
• EN 17450-5: Requirements and test methods for pressure switches (planned)

It also references established standards such as EN ISO 9227 for corrosion testing (neutral salt spray tests), which supports the evaluation of valve resistance against environmental degradation.

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By following SIST EN 17450-3:2025, stakeholders in fixed firefighting water mist systems ensure that check valves deliver the safety, performance, and durability vital to modern fire suppression strategies, helping to protect lives and property effectively.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2025
Vgrajeni gasilni sistemi - Sestavni deli za sisteme s pršečo vodo - 3. del: Zahteve
in preskusne metode za kontrolne ventile
Fixed firefighting systems - Components for water mist systems - Part 3: Requirements
and test methods for check valves
Ortsfeste Brandbekämpfungsanlagen - Bauteile für Wassernebelsysteme – Teil 3:
Anforderungen und Prüfverfahren für Rückschlagventile
Installations fixes de lutte contre l’incendie - Composants pour systèmes à brouillard
d’eau - Partie 3 : Exigences et méthodes d’essai pour les clapets anti-retour
Ta slovenski standard je istoveten z: EN 17450-3:2025
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17450-3
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2025
EUROPÄISCHE NORM
ICS 13.220.20
English Version
Fixed firefighting systems - Components for water mist
systems - Part 3: Requirements and test methods for check
valves
Installations fixes de lutte contre l'incendie - Ortsfeste Brandbekämpfungsanlagen - Bauteile für
Composants pour systèmes à brouillard d'eau - Partie 3 Wassernebelsysteme - Teil 3: Anforderungen und
: Exigences et méthodes d'essai pour les clapets anti- Prüfverfahren für Rückschlagventile
retour
This European Standard was approved by CEN on 2 March 2025.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17450-3:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 4
4.1 General design . 4
4.2 Internal pressure . 5
4.3 Strength . 5
4.4 Leak resistance . 5
4.5 Resistance to water cycling . 5
4.6 Function . 5
4.7 Resistance against corrosion . 5
4.8 Vibration resistance . 5
4.9 Documentation . 5
4.9.1 Installation, operation, testing and maintenance documentation . 5
4.9.2 Testing authority documentation . 5
4.9.3 Design documentation . 6
5 Test methods . 6
5.1 Test conditions . 6
5.2 Compliance . 6
5.3 Internal pressure test . 6
5.4 Strength test . 6
5.5 Leak resistance test . 7
5.6 Water cycling test . 7
5.7 Function . 7
5.8 Corrosion tests . 7
5.9 Vibration resistance . 7
6 Marking . 8
Bibliography . 9

European foreword
This document (EN 17450-3:2025) has been prepared by Technical Committee CEN/TC 191 “Fixed
firefighting systems”, the secretariat of which is held by BSI.
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 October 2025, and conflicting national standards shall
be withdrawn at the latest by October 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
EN 17450, Fixed firefighting systems — Water mist systems, consists of the following parts:
— Part 1: Product characteristics and test methods for strainer and filter components
— Part 2: Product characteristics and test methods for nozzles
— Part 3: Product characteristics and test methods for check valves
— Part 4: Product characteristics and test methods for control deluge valves and actuators
— Part 5: Product characteristics and test methods for pressure switches
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Under preparation.
Document planned
1 Scope
This document specifies the requirements and describes the test methods for check valves for water mist
firefighting systems.
Check valves allow the passage in the direction of flow and they prevent flow in t
...