Bsi bs en 12259 2 1999 (2006)

4 Wet alarm valve assembly construction and performance5 Retard chamber construction and performance 6 Marking 7 Instructions for fitting and operation 8 Evaluation of conformity Annex A

12259-2:1999

Incorporating Amendments Nos 1, 2 and Corrigendum

No 1

Fixed firefighting systems — Components for sprinkler and water spray systems —

Part 2: Wet alarm valve assemblies

The European Standard EN 12259-2:1999, with the incorporation of Amendments A1:2001 and A2:2005, has the status of a British Standard

ICS 13.220.20

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -This British Standard, having

been prepared under the

direction of the Health and

Environment Sector Policy and

Strategy Committee, was

published under the authority

of the Standards Policy and

This British Standard is the official English language version of

EN 12259-2:1999, including amendments A1:2001 and A2:2005

The start and finish of text introduced or altered by amendment is indicated in the text by tags !" Tags indicating changes to CEN text carry the number

of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !"

This European Standard is the subject to transitional arrangements agreed under a Commission mandate which is intended to lead to CE marking in support of the Construction Products Directive In order to allow for any changes in national regulations, the Member States have agreed a transition period

This period (date of applicability) started with an announcement in the Official Journal of the European Communities(OJ) on 1 January 2002 The transition period will end on 1 January 2003

The UK participation in its preparation was entrusted by Technical Committee FSH/18, Fixed firefighting systems, to Subcommittee FSH/18/2, Sprinklers, which has the responsibility to:

A list of organizations represented on this subcommittee can be obtained on request to its secretary

Cross-references

The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or

by using the “Search” facility of the BSI Electronic Catalogue or of British

— aid enquirers to understand the text;

— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep

Sidelining in this document indicates the most recent changes by amendment

Amendments issued since publication

13884

Copyright British Standards Institution

Fixed firefighting systems — Components for sprinkler and water spray systems —

Part 2: Wet alarm valve assemblies (includes amendments A1:2001 and A2:2005)

Installations fixes de lutte contre l’incendie —

Composants des systèmes d’extinction du type

sprinkler et à pulvérisation d’eau —

Partie 2: Systèmes de soupape d’alarme hydraulique

(inclut les amendements A1:2001 et A2:2005)

Ortsfeste Löschanlagen — Bauteile für Sprinkler-undSprühwasseranlagen —

Teil 2: Naßalarmventil mit Zubehör(enthält Änderungen A1:2001 und A2:2005)

This European Standard was approved by CEN on 2 October 1997 Amendment A1:2001 was approved by CEN

on 20 January 2001 and amendment A2:2005 was approved by CEN on 19 October 2005

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

Central Secretariat 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 theCentral Secretariat has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

CEN

European Committee for StandardizationComité Européen de NormalisationEuropäisches Komitee für Normung

Central Secretariat: rue de Stassart, 36 B-1050 Brussels

© 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national

4 Wet alarm valve assembly construction and performance

5 Retard chamber construction and performance

6 Marking

7 Instructions for fitting and operation

8 Evaluation of conformity

Annex A (normative) Fire exposure test for body and cover

Annex B (normative) Strength test for body and cover

Annex C (normative) Performance tests

Annex D (normative) Fatigue test for springs and diaphragms

Annex E (normative) Endurance tests

Annex F (normative) Resistance to ageing test for non-metallic components

(excluding gaskets and seals)

Annex G (normative) Resistance to adhesion test for sealing assembly elements

Annex H (normative) Determination of pressure loss due to hydraulic friction loss

Annex I (normative) Leakage resistance test

Annex J (normative) Strength test for retard chambers

Annex K (informative) Typical testing schedule and example of test specimen numbers

for wet alarm valve assemblies and retard chambers (only for conventional design)

Annex L (informative) Recommendations for type approval testing

Annex M (informative) Attestation of conformity

Annex ZA (informative) Clauses of this European Standard addressing the

provisions of the EU Construction Products Directive

Bibliography

Annex N (normative) Salt mist corrosion test

© BSI 2006

366681314

151517

19192222

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This European Standard 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 December 1999, and conflicting national standards shall be withdrawn at the

latest by December 1999

This European Standard has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s)

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,

Switzerland and the United Kingdom

It forms one part of EN 12259, covering components for automatic sprinkler systems and is included in a series

of European Standards planned to cover:

a) automatic sprinkler systems (EN 12259);

b) gas extinguishing systems (EN 12094 and EN ISO 14520);

c) powder systems (prEN 12416);

d) explosion protection systems (EN 26184);

e) foam systems1);f) halon systems1);g) hydrant and hose reel systems (EN 671);

h) smoke and heat control systems (EN 12101);

i) water spray systems1)

EN 12259 has the general title Fixed firefighting systems — Components for sprinkler and water spray systems

and will be subdivided as follows:

Part 1: Sprinklers;

Part 2: Wet alarm valve assemblies;

Part 3: Dry alarm valve assemblies;

Part 4: Water motor alarms;

Part 5: Water flow detectors;

Part 6: Pipe couplings;

Part 7: Pipe hangers;

Part 8: Pressure switches;

Part 9: Deluge alarm valve assemblies;

Part 10: Multiple controls;

Part 11: Medium and high velocity water sprayers;

Part 12: Pump sets

Users should note that standards undergo revision from time to time and that any reference made herein to any

other European or International Standard implies its latest edition, unless otherwise stated

This standard is to be entrusted for use to qualified and experienced organizations

EN 12259-2:1999

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -Foreword to amendment 1

This amendment EN 12259-2:1999/A1:2001 to the EN 12259-2:1999 has been prepared by Technical

Committee CEN/TC 191, Fixed fire fighting systems, the Secretariat of which is held by BSI

This document is currently submitted to the Unique Acceptance Procedure

This amendment to the European Standard EN 12259-2:1999 has been prepared under a mandate given to CEN

by the European Commission and the European Free Trade Association, and supports essential requirements of

EU Directive(s)

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard

It forms one part of EN 12259, covering components for automatic sprinkler systems and is included in a series

of European Standards planned to cover:

a) automatic sprinkler systems (EN 12259 & EN 12845)1;b) gaseous extinguishing systems (EN 12094)1;

c) powder systems (EN 12416)1);d) explosion protection systems (EN 26184);

e) foam systems (EN 13565);

f) hydrant and hose reel systems (EN 671);

g) smoke and heat control systems (EN 12101)1;h) water spray systems1

EN 12259 has the general title, Fixed fire fighting systems — Components for sprinkler and water spray

systems, and will subdivided as follows:

Part 1: Sprinklers;

Part 2: Wet alarm valve assemblies;

Part 3: Dry alarm valve assemblies;

Part 4: Water motor alarms;

Part 5: Water flow detectors;

Part 6: Pipe couplings;

Part 7: Pipe hangers;

Part 8: Pressure switches;

Part 9: Deluge alarm valve assemblies;

Part 10: Multiple controls;

Part 11: Medium and high velocity water sprayers;

Part 12: Sprinkler pump sets

© BSI 2006

Copyright British Standards Institution

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -Foreword to amendment 2

This European Standard (EN 12259-2:1999/A2:2005) has been prepared by Technical Committee

CEN/TC 191 “Fixed firefighting systems”, the secretariat of which is held by BSI

This Amendment to the European Standard EN 12259-2:1999 shall be given the status of a national standard,

either by publication of an identical text or by endorsement, at the latest by May 2006, and conflicting national standards shall be withdrawn at the latest by August 2007

This European Standard has been prepared under a mandate given to CEN by the European Commission and

the European Free Trade Association, and supports essential requirements of EU Directive(s)

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European

Standard

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland

and United Kingdom

EN 12259-2:1999

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -1 Scope

This standard specifies requirements for constructions and performance of wet alarm valve assemblies and retard

chambers used in automatic sprinkler systems Auxiliary components and attachments to wet alarm valve

assemblies and retard chambers are not covered by this standard

NOTE All pressure data in this European standard are given as gauge pressure in bar 2)

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications These

normative references are cited at the appropriate places in the text and the publications are listed hereafter For

dated references, subsequent amendments to or revisions of any of these publications apply to this European

Standard only when incorporated in it by amendment or revision For undated references the latest edition of the

publication referred to applies

ISO 898-1:1988, Mechanical properties of fasteners — Part 1: Bolts, screws and studs.

ISO 898-2:1992, Mechanical properties of fasteners — Part 2: Nuts with specified proof load values.

differential pressure ratio

ratio of service pressure to installation pressure at the trip point (see 3.18)

rated working pressure

maximum service pressure (see 3.15) at which the wet alarm valve or retard chamber is intended to operate

3.8

ready condition

state of the wet alarm valve in a sprinkler installation filled with water from a water supply of stable pressure,

when there is no water flow from any outlet downstream from the sealing assembly

3.9

reinforced elastomeric element

element of a clapper, clapper assembly or seat seals made of an elastomeric compound with one or more other

components that increase the tensile strength of the combination to at least twice that of the elastomeric material

difference in times between the passage of water through the wet alarm valve port and the actuation of the alarm

device, measured with and without the retard chamber

3.12

sealing assembly

main movable sealing element of the wet alarm valve (such as a clapper)

3.13

sealing assembly seat ring

main fixed sealing element of the wet alarm valve

point at which the wet alarm valve operates admitting water into the sprinkler installation measured in terms of

the installation and service pressures

EN 12259-2:1999

waste of water

discharge of any water from the alarm port of the wet alarm valve which is in the ready condition

3.20

water motor alarm

hydraulically actuated alarm device (see 3.1) fitted to the wet alarm valve to provide a local audible alarm when

the sprinkler installation operates

3.21

wet alarm valve

valve to permit flow of water into a wet sprinkler installation but prevent reverse flow of water

4 Wet alarm valve assembly construction and performance

4.1 Nominal size

The nominal size shall be expressed as the nominal diameter of the inlet and outlet connections, i.e the pipe size

for which the connections are intended The nominal size shall be DN50, DN65, DN80, DN100, DN125,

DN150, DN200 or DN250

NOTE The diameter of the waterway through the sealing assembly seat ring may be less than the nominal size.

4.2 Connections to the assembly

The dimensions of all connections shall be specified by the wet alarm valve assembly supplier

4.3 Rated working pressure

The rated working pressure shall not be less than 12 bar

NOTE Inlet and outlet connections may be machined for lower working pressure, to match installation equipment of a lower working

pressure.

4.4 Body and cover

4.4.1 Materials

4.4.2 Configuration

It shall not be possible to assemble the wet alarm valve cover plate (if fitted) in a position which so affects the

operation of the valve that it does not conform to this standard, in particular regarding the indication of flow

direction, [see 6.2 d)].

!4.4.1.1 The body and any cover shall be made of cast iron, bronze, brass, monel metal, stainless steel,

titanium or other materials with equivalent physical and mechanical properties

4.4.1.2 Cover fasteners shall be made of steel, stainless steel, titanium or other materials with equivalent

physical and mechanical properties

4.4.1.3 If non-metallic materials (other than for gaskets, pipe seals and unexposed plastic bushings and inserts),

or metals with a melting point of less than 800 °C (other than for gaskets, pipe seals and unexposed plastic

bushings and inserts), form part of the wet alarm valve body or cover, the sealing assembly shall open freely

and fully when tested in accordance with Annex A and the assembled wet alarm valve shall conform to the

requirements of 4.12."

© BSI 2006

Copyright British Standards Institution

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -4.4.3 Strength

4.4.3.1 The assembled wet alarm valve with the sealing assembly open shall withstand, without rupture, an

internal hydrostatic pressure of four times the rated working pressure, when tested in accordance with annex B

4.5 Drain

4.6 Sealing assembly

4.6.1 Access for maintenance

Means shall be provided for access to working parts and allow removal of the sealing assembly

NOTE 1 Whatever method is adopted it should permit ready maintenance by one person with a minimum of down-time.

NOTE 2 The design of any element which may normally be disassembled during servicing should be such that it cannot be reassembled

wrongly without an external visual indication when the wet alarm valve is returned to service.

NOTE 3 With the exception of the valve seat, all parts intended for field replacement should be capable of being disassembled and

reassembled with tools normally employed by the trade.

4.6.2 Closing

The closing action of the wet alarm valve shall be assisted by gravity in all intended mounting positions, that is

the sealing assembly shall fall towards the seat when water flow ceases when tested in accordance with C.1.

NOTE Springs may be used to ensure full and proper seating.

4.6.3 Fatigue resistance of springs and diaphragms

Springs and diaphragms shall not fracture or rupture during 50 000 cycles of normal operation when tested in

accordance with annex D

4.6.4 Resistance to damage of sealing assembly

The sealing assembly shall bear against a definite stop in the open position There shall be no sign of damage to

the sealing elements of the wet alarm valve or any permanent twist, bend or fracture of any parts after testing in

accordance with E.1 and E.2

4.6.5 Materials for seat rings and bearing surfaces

!4.4.3.2 The normal design load of any fastener, excluding the force required to compress the gasket, shall

not exceed the minimum tensile strength specified in ISO 898-1 and ISO 898-2 or other appropriate European

Standards for materials not covered by ISO 898, when the wet alarm valve is pressurised to four times the rated

working pressure The area of the application of pressure shall be calculated as follows:

a) if a full-face gasket is used, the area of force application is that extending out to a line defined by the inner edge of the bolts;

b) if a toroidal sealing ring or ring gasket is used, the area of force application is that extending out to the centre line of the toroidal sealing ring or ring gasket

The wet alarm valve shall be provided with a connection to drain water from the valve body downstream of

the sealing assembly when the valve is installed in any position specified or recommended by the supplier The

minimum nominal size shall be 20 mm."

!4.6.5.1 Seat rings shall be made of bronze, brass, monel metal, stainless steel, titanium or materials having

at least equivalent physical, mechanical and corrosion resistant properties."

EN 12259-2:1999

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -4.7 Non-metallic elements (excluding gaskets and seals)

4.8 Sealing assembly elements

4.8.1 In the ready condition there shall be no waste of water when the wet alarm valve assembly is tested in

accordance with C.1

NOTE Valve sealing surfaces should withstand ordinary wear and tear, rough usage, compression stresses, and damage due to pipe scale or

foreign matter carried by the water.

4.8.2 A seal made of elastomer or other resilient materials shall not adhere to the mating surface when tested in

accordance with annex G

4.9 Clearances

NOTE 1 Clearances are necessary between moving parts and between moving and stationary parts so that corrosion or deposits of foreign

matter within an assembly will not render the wet alarm valve sluggish in action or inoperative.

NOTE 2 If an internal or external compensator is provided it should be such that deposits or sediment will not readily accumulate to an

extent sufficient to interfere with its proper operation, and there should be sufficient play between the working parts to allow proper seating

of the main and any auxiliary valves.

4.9.1 The radial clearance [see Figure 1a)] between the sealing assembly and the inside walls of the body, in

every position except the wide open position, shall not be less than 12 mm if the body is cast iron, or 6 mm if

body and sealing assembly are of non-ferrous metal, stainless steel, or a combination of those

4.9.2 The diametrical clearance [see Figure 1b)], shall be not less than 3 mm between the inner edges of the seat

ring and the metal parts of a sealing assembly when in the closed position

4.9.3 Any space in which the sealing assembly may trap debris below the valve seat shall be not less than 3 mm

deep

4.9.4 The diametrical clearance [see Figure 1b)] between any pins and their bearings shall be not less than

0,125 mm

4.9.5 The axial clearance (L2 - L1) [see Figure 1c)] between any clapper hinge and the adjacent wet alarm valve

body bearing surfaces shall be not less than 0,25 mm

4.9.6 Any reciprocating guide components in the main valve body, operation of which is essential to allow a wet

alarm valve to open, shall have a minimum diametrical clearance of not less than 0,7 mm in that portion over

which the moving component enters the fixed component and of not less than 0,05 mm in that portion of the

moving component continuously in contact with the fixed component in the ready condition

4.6.5.2 The bearing surfaces of any contacting parts, which rotate or slide relative to each other, shall be

made of bronze, brass, monel metal, stainless steel, titanium or non-metallic materials This may be achieved by

bushings or inserts

After ageing in accordance with Annex F, there shall be no cracking of any non-metallic elements and a wet

alarm valve shall meet the performance and leak resistance requirements of 4.10.1 and 4.12 when tested in

accordance with C.1 and Annex J Non-metallic bearing surfaces of any contacting parts which rotate or slide

relative to each other shall also meet the performance requirements of 4.13.2 when tested in accordance

with E.2."

!4.9.7 Any sealing assembly bushings or hinge pin bearings shall project a sufficient axial distance to

maintain dimension A [see Figure 1 c)] at not less than 1,5 mm if the adjacent parts are not of bronze, brass,

monel metal, stainless steel, titanium or corrosion protected metal Where corrosion protected metal parts are

used, the parts shall show no visible of deterioration of the coating such as blistering, delamination, flaking or

increased resistance to movement when tested in accordance with Annex N."

© BSI 2006

!

Copyright British Standards Institution

a) Radial clearance = R2 - R1 b) Diametrical clearance = D2 - D1

c) Total axial clearance = l2 - l1; clearance,

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -4.10 Performance

4.10.1 Alarm and sensitivity characteristics

When tested in accordance with C.1 before and after hydrostatic pressure testing in accordance with C.2 the wet

alarm valve assembly shall conform to the following

a) The valve shall not signal an alarm when discharge takes place downstream from the wet alarm valve, atflows up to 10 l/min with a service pressure of 1,4 bar to rated working pressure

NOTE It can signal an alarm when continuous discharge takes place downstream from the valve at flows above 10 l/min at all service

pressures.

b) The valve shall signal an alarm when continuous discharge takes place downstream from the wet alarmvalve at flows of 80 l/min to 300 l/min at service pressures from 1,4 bar to rated working pressure Wetalarm valves without retard chambers shall initiate continuous operation of mechanical and electricalalarm devices within 15 s from the time that the downstream valve is opened Wet alarm valves withretard chambers shall initiate continuous operation of mechanical and electrical alarm devices between

5 s and 90 s after the wet alarm valve opens as indicated by water flow from the drain

c) The valve shall stop water flow to alarm devices on cessation of water flow from the wet alarm valveinstallation downstream of the wet alarm valve

d) The valve shall transmit successive alarms without requiring manual resetting

e) The valve shall provide a pressure of not less than 0,5 bar at pressure gauge 4 (see Figure C.1) corrected

to the level of the alarm port, or at the outlet of the retard chamber, if provided, at a service pressure of1,4 bar, while actuating relevant water motor alarms and electric alarm devices

f) The piping between the wet alarm valve or any alarm shut-off valve and the water motor alarm shalldrain automatically after each operation

4.10.2 Resistance to reverse flow and deformation

The wet alarm valve assembly shall withstand, without leakage, permanent distortion or structural failure, an

internal hydrostatic pressure of twice the rated working pressure applied at the downstream end with the sealing

assembly closed and the upstream end vented, when tested in accordance with C.2

4.10.3 Operation

The wet alarm valve shall operate correctly, without adjustment or damage, at service pressures within the range

from 1,4 bar to the rated working pressure, when tested in accordance with C.1 The wet alarm valve shall reset

automatically after each operation

4.10.4 Differential pressure ratio

The ratio of service pressure to installation pressure shall not exceed 1,16:1 for service pressures from 1,4 bar to

the rated working pressure as measured at the trip point prior to pressure equalization upstream and downstream

of the sealing assembly when tested in accordance with C.3

4.11 Pressure loss due to hydraulic friction

The pressure loss across the wet alarm valve shall not be more than 0,4 bar when tested in accordance with

annex H

NOTE If the pressure loss is more than 0,2 bar the wet alarm valve is marked with the pressure loss [see 6.2i)], because there are

restrictions in the application of such valves.

© BSI 2006

Copyright British Standards Institution

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -4.12 Leak resistance

There shall be no leakage, permanent distortion or rupture of a wet alarm valve at an internal hydrostatic

pressure of twice the rated working pressure applied to the upstream and the downstream end with the sealingassembly closed and the alarm port opened when tested in accordance with annex J

4.13 Endurance

4.13.1 The wet alarm valve and its moving parts shall show no sign of distortion, cracks, delamination,

loosening, displacement, or other failure when tested in accordance with E.1

4.13.2 The wet alarm valve and its moving parts shall show no sign of distortion, cracks, delamination,

loosening, displacement, or other failure when tested through 1 000 operation cycles in accordance with E.2

5 Retard chamber construction and performance

5.1 Rated working pressure

The rated working pressure shall not be less than 12 bar

NOTE The strainer should be of a corrosion resistant material.

5.4 Support

The retard chamber shall include means for its support If piping is to be used for this support, the pipe size to beused and the maximum length of pipe so used shall be stated on the instruction charts provided with the retardchamber

!A connection of a nominal size not less than 20 mm shall be provided in the retard chamber for the

connection of alarm devices."

EN 12259-2:1999

`,`,`,,``,,`,```,,,``,``,,``-`-`,,`,,`,`,,` -5.7 Access for maintenance

Means shall be provided for access to working parts

NOTE 1 Whatever method is adopted it should permit ready maintenance by one person with a minimum of down-time.

NOTE 2 The design of any element which may normally be disassembled during servicing should be such that it cannot be reassembled

wrongly.

NOTE 3 All parts intended for field replacement should be capable of being disassembled and reassembled with tools normally employed

by the trade.

5.8 Elements

5.8.1 Springs and diaphragms

Springs and diaphragms shall not fracture or rupture during 50 000 cycles of normal operation when tested in

accordance with annex D

5.8.2 Non-metallic elements (excluding gaskets and seals)

After ageing in accordance with annex F, there shall be no cracking of any non-metallic components and the

retard chamber shall meet the requirements of 4.10.1 when tested in accordance with C.1 and shall meet the

strength requirements of 5.2 when tested in accordance with annex K.

6 Marking

6.1 General

a) either cast or stamped directly on the wet alarm valve or retard chamber; or b) on a metal label with raised or depressed characters (for example by etching, casting, or stamping), that is mechanically attached (for example by rivets or screws) to the body of the wet alarm valve or retard chamber; cast labels shall be of non-ferrous metal

The minimum dimensions of the marked characters shall be as specified in Table 1

Table 1 — Minimum dimensions of marked characters

Type of marking Minimum character height,

except for 6.2 g) a

mm

Minimum depression or projection of characters

mm

a The minimum character height for item g), serial number or year of manufacture, shall be 3 mm

6.2 Wet alarm valves

Wet alarm valves shall be marked with the following:

a) name or trade mark of the supplier;

b) distinctive model number, catalogue designation or equivalent marking;

c) name of device, i.e “wet alarm valve”;

d) indication of flow direction;

e) nominal size of valve;

f) rated working pressure in bar;

g) serial number, or a year which shall be one of the following:

1) the actual year of manufacture; or2) for wet alarm valves manufactured in the last three months of a calendar year, the following yeardate; or

3) for wet alarm valves manufactured in the first six months of a calendar year, the previous year date;h) mounting position if limited to vertical or horizontal position;

i) pressure loss due to hydraulic friction if more than 0,2 bar (see 4.11);

j) factory of origin, if manufacture is at two or more factories;

k) the number of this European Standard i.e EN 12259-2

6.3 Retard chambers

Retard chambers shall be marked with the following:

a) name or trademark of the supplier;

b) distinctive model number, catalogue designation or equivalent marking;

c) name of device, i.e “retard chamber”;

d) rated working pressure in bar;

e) indication of flow direction;

f) factory of origin, if manufacture is at two or more factories;

g) the number of this European Standard i.e EN 12259-2

7 Instructions for fitting and operation

Instructions for fitting and operation shall be supplied with each wet alarm valve and each retard chamber Theseshall include an illustration showing the recommended method of fitting and the trim function, assembly viewsand to explain operation, and recommendations for care and maintenance

8 Evaluation of conformity

8.1 General

The compliance of a wet alarm valve assembly with the requirements of this standard shall be demonstrated by:

— initial type testing;

— factory production control by the manufacturer

8.2 Initial type testing

Initial type testing shall be performed on first application of this standard Tests previously performed in

accordance with the provisions of this standard (same product, same characteristic, test method, samplingmethod and system of attestation of conformity) may be taken into account In addition, initial type testing shall

be performed at the beginning of the production type or at the beginning of a new method of production (wherethere may affect the stated properties)

EN 12259-2:1999

8.3 Factory production control (FPC)

The supplier shall establish, document and maintain an FPC system to ensure that the products placed on the

market conform with the stated performance characteristics

The FPC system shall consist of procedures, regular inspections and test and/or assessments and the use of the

results to control raw and other incoming materials or components, equipment, the production process and the

product It shall be sufficiently detailed to ensure that the conformity of the product is apparent, ensuring

detection of irregularities at the earliest possible stage

An FPC system conforming with requirements of the relevant parts(s) of EN ISO 9000, and made specific to the

requirements of this standard, shall be considered to satisfy the above requirements

The results of inspections, tests or assessments requiring action shall be recorded, as shall any action taken The

action to be taken when control values or criteria are not met shall be recorded

The production control procedure shall be recorded in a manual, which shall be made available when requested

The supplier shall carry out and record the results of production tests as part of the production control

These records shall be available if requested

© BSI 2006

Copyright British Standards Institution