Bsi bs en 12541 2002 (2003)

BRITISH STANDARD BS EN 12541 2002 Sanitary tapware — Pressure flushing valves and automatic closing urinal valves PN 10 The European Standard EN 12541 2002 has the status of a British Standard ICS 91[.]

Sanitary tapware —

Pressure flushing

valves and automatic

closing urinal valves

This British Standard was

published under the authority

of the Standards Policy and

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 the

Amendments issued since publication

EUROPÄISCHE NORM

ICS 91.140.70

English version

Sanitary tapware - Pressure flushing valves and automatic

closing urinal valves PN 10

Robinetterie sanitaire - Robinets de chasse d'eau et d'urinoirs à fermeture hydraulique automatique PN 10

Sanitärarmaturen - WC- und Urinaldruckspüler mit

selbsttätigem Abschluss PN 10

This European Standard was approved by CEN on 23 October 2002.

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 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 Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2002 CEN All rights of exploitation in any form and by any means reserved Ref No EN 12541:2002 E

page

Foreword 4

1 Scope 5

2 Normative references 5

3 Terms and definitions 6

4 Classification and Designation 7

4.1 Classification of flushing valves 7

4.2 Classification of urinal valves 7

4.3 Designation 8

5 Marking 8

6 Materials 8

6.1 Chemical and hygienic requirements 8

6.2 Condition of exposed surfaces and quality of coating 8

7 Dimensional characteristics 8

7.1 WC flushing valve 9

7.2 Urinal valves 10

8 Leaktightness characteristics 12

8.1 General 12

8.2 Leaktightness tests 13

8.3 Leaktightness tests - Summary table 14

9 Pressure resistance characteristics 14

9.1 General 14

9.2 Mechanical behaviour tests 14

9.3 Mechanical behaviour tests - Summary table 16

10 Hydraulic and flow characteristics of WC flushing valves 16

10.1 General 16

10.2 Test method for WC flushing valves 16

10.3 Outline of flow rate-time-volume-impact force test and requirements 22

10.4 Summary of requirements 26

10.5 Measurement of water hammer 26

11 Principle and verification of atmospheric pipe interrupters of WC flushing valves 27

11.1 General 27

11.2 Atmospheric pipe interrupter composition 27

11.3 Installation conditions 28

11.4 Verification of absence of water splashes 29

11.5 Verification of operation at vacuum 29

12 Hydraulic or flow characteristics of urinal valves 30

12.1 General 30

12.2 Test method for urinal valves 30

12.3 Requirements 31

13 Operating force 31

14 Mechanical endurance characteristics 31

14.1 General 31

14.2 WC flushing valves 31

14.3 Urinal valves 32

15 Acoustic characteristics 32

15.1 General 32

15.2 Procedure 33

15.3 Requirements 33

This document (EN 12541:2002) has been prepared by Technical Committee CEN/TC 164, "Water supply", thesecretariat of which is held by AFNOR

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 June 2003, and conflicting national standards shall be withdrawn at the latest byJune 2003

As for possible unfavourable effects of the product to which this standard applies on the quality of water for humanconsumption :

1) no information is provided by this standard on possible use restrictions of the product in any of themember states of the EU or the EFTA ;

2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing nationalregulation concerning the use and/or characteristics of this product remain in force

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom

1 Scope

This draft European standard applies to flushing valves for WCs and valves for urinals, with automatic hydraulicclosure, intended for :

 WC pans EN 997 ;

 single flush urinals prEN 13407 ;

 siphon acting urinals prEN 13407

It does not apply to no-contact detection valves

It is intended to specify :

 marking and identification, physico-chemical, dimensional, leaktightness, pressure behaviour, hydraulic,mechanical endurance and acoustic characteristics of flushing valves for WCs and urinals with automaticclosure ;

 test methods used to verify these characteristics ;

 and to determine requirements for the atmospheric interrupter which shall be an integral part of the WCflushing valve

It applies in the following pressure and temperature conditions :

Table 1 — Conditions of use for tapware

Urinals

WC DN 15

WC DN 20

0,1 MPa ≤ P ≤ 0,4 MPa(1 bar ≤ P ≤ 4 bar)

WC DN 25

0,08 MPa ≤ P ≤ 0,25 MPa(0,8 bar ≤ P ≤ 2,5 bar)

Dynamic Pressure range recommended for a good

working

WC DN 32

0,08 MPa ≤ P ≤ 0,2 MPa(0,8 bar ≤ P ≤ 2 bar)

Maximum static pressure 1 MPa (10 bar)

Water temperature ≤ 25 °C

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision For undated references the latest edition of thepublication referred to applies (including amendments)

EN 248, Sanitary tapware — General specification for electrodeposited nickel chromium coatings of Ni-Cr

EN 997, WC pans with integral trap

prEN 13407:1998, Wall-hung urinals - Functional requirements and test methods

EN ISO 3822-1, Acoustics — Laboratory tests on noise emission from appliances and equipment used in watersupply installations — Part 1 : Method of measurement (ISO 3822-1:1999)

EN ISO 3822-4, Acoustics — Laboratory tests on noise emission from appliances and equipment used in watersupply installations — Part 4 : Mounting and operating conditions for special appliances (ISO 3822-4:1997)

ISO 49, Malleable cast iron fittings threaded to ISO 7-1

ISO 65, Carbon steel tubes suitable for screwing in accordance with ISO 7-1

ISO 228-1:2000, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions,tolerances and designation

3 Terms and definitions

For the purposes of this European Standard, the following terms and definitions apply

3.1

automatic closing valves

tapware whose opening is operated by a mechanical action on the control device, and whose closure happensautomatically after a period of adjustable or non-adjustable duration

stop valves for flushing valve

this is used to stop water flow upstream of the flushing valve It may be integrated into the flushing valve, orseparate from it

3.2.2

flow control equipment

manual or automatic equipment controlling the flush flow and which is an integral part of the flushing valve or of thestop valve If it is part of the stop valve, this latter shall not be linked to the flushing valve by a ISO 228 thread

3.2.3

volume control equipment

this is used to control the volume of water delivered by a flushing valve

3.3 Urinal valves

3.3.1

single flush urinal valves

these are intended for flushing single flush urinals (see prEN 13407:1998, 3.6 and 3.7)

3.2.2

siphon action urinal valves

these are intended for flushing siphon acting urinals (see prEN 13407:1998, 3.4)

stop valves for urinal valves

this is used to stop water supply It may be integrated in the urinal valve and may be used to control the flow

3.4 Key to Abbreviations

Table 2 — Abbreviations

DESIGNATION ABBREV UNIT DEFINITION

Nominal size DN mm Defines the hydraulic and dimensional values of the

valveFlow rate Q l/s Volume of water supplied in the unit of timeOperating time T s Time elapsing between the start of activation and the

return to 0 of the flow rateVolume of water V l Volume of water supplied during the operating timeStatic pressure Ps MPa (bar) Pressure upstream of valve in absence of flowDynamic pressure Pd MPa (bar) Pressure upstream of valve during flowWater hammer ∆P MPa (bar) Overpressure occurring upstream of valve at time of

closureImpact force F N Force produced by jet at outlet of flushing pipe

4 Classification and Designation

4.1 Classification of flushing valves

Flushing valves are classified according to their volume class

4.1.1 6 litre and 6 to 9 litre valves

If a valve is intended to deliver 6 litres of water, or is adjustable from 6 to 9 litres of water, the valve belongs to

"Class 6"

4.1.2 9 litre valve

If the valve is intended to deliver 9 litres of water, the valve belongs to "Class 9"

4.2 Classification of urinal valves

Urinal valves are classified according to their “volume class”

If a valve is intended to deliver 6 litres of water, the valve belongs to "Class 6"

4.3 Designation

An automatic closing flushing or urinal valve is designated by :

 the type of appliance for which it is intended (WC, siphon action urinal, single flush urinals…) ;

 volume class (e.g class 6 or class 9) ;

 type of control (push-button, remote control ) ;

 mounting method (top-entry, side-entry, flush ) ;

 its nominal DN size ;

 its connecting dimension ;

 the presence of an incorporated stop valve ;

 the acoustic group (if classified)

EXAMPLE flushing valve / for WC / Class 6 / push-button / top-entry / DN 20 / G3/4 B with incorporated stop valve /Group 1

5 Marking

Tapware complying with this standard shall be marked indelibly and permanently on the appliance with the mark orname of the manufacturer and the acoustic group

6 Materials

6.1 Chemical and hygienic requirements

All materials in contact with water intended for human consumption shall present no danger to health up to atemperature of 25°C

They shall cause no deterioration in water intended for human consumption either with regard to nutritional quality,appearance, smell or taste

Within the limits recommended in Clause 1 for correct operation, the materials shall not undergo any deterioration,which might compromise the operation of the valve

Pressurised parts shall withstand the limits of use set in Table 1

Materials with inadequate corrosion resistance shall be given adequate protection against it

6.2 Condition of exposed surfaces and quality of coating

Exposed chromium plated surfaces shall comply with the specifications of EN 248

7.1 WC flushing valve

Table 3 — Threads and outlet pipe (see Figure 1 and Figure 2)

A Male thread (ISO 228-1:2000) G1/2B G3/4B G1B G1 1/4B

D Female thread (ISO 228-1:2000) G1/2 G1/2 G3/4 G1

G (+0/-0,5) mm Diameter of pipe connection sleeve 20 26 26 or 30 30

H (+0,2/+0,5) mm Diameter of valve outlet for connection to

pipe by compression joint

22 28 28 or 32 32

Table 4 — Permitted thread lengths (see Figure 1 and Figure 2)

Dimension Comment G1/2B G1/2 G3/4B G3/4 G1B G1 G1 1/4B

7.1.1 Side-entry WC flushing valves

Figure 1 — Side entry WC flushing valves (see Table 3 and Table 4)

7.1.2 Top-entry WC flushing valves

Figure 2 — Top entry WC flushing valves (see Table 3 and Table 4)

7.2 Urinal valves

Table 5 — Threads (see Figure 3 and Figure 4)

Aa Male thread (ISO228-1:2000) G1/2B G3/4B

Da Female thread (ISO 228-1:2000) G1/2 G1/2

a If the urinal connecting pipe is supplied with the valve, dimensions A and D are not mandatory at the outlet

7.2.1 Top entry urinal valve

Figure 3 — Top-entry urinal valve (see Table 5)

7.2.2 Side-entry urinal valves

Figure 4 — Side -entry urinal valve (see Table 5)

NOTE Where the outlet and inlet are different, the nominal size is that of the inlet and the outlet diameter will be shown(e.g : top-entry urinal valve G1/2 male with female outlet G3/4H)

If flow rate adjustment is incorporated in the stop valve, it is the mounted unit, which shall be tested

8.2 Leaktightness tests

8.2.1 Test methods

8.2.1.1 Principle

The test principle consists of verifying under cold water pressure :

a) the leaktightness of the stop valve ;

b) the leaktightness of the tapware (body, head-body unit, etc.)

 Connect tapware to test circuit ;

 apply a static water pressure of (1,6 ± 0,05) MPa ((16 ± 0,5) bar) for (60 ± 5) s ;

 apply a static water pressure of (0,1 ± 0,01) MPa ((1 ± 0,1) bar) for (60 ± 5) s

8.2.2.2 Requirements

a) Verify the leaktightness of stop valve There shall be no leakage at the stop valve for the duration of the test ;b) verify the leaktightness upstream of the seat There shall be no leakage or seepage through the walls of thevalve for the duration of the test

8.2.3 Leaktightness of tapware downstream of the seat

This test only applies to urinal valves

8.2.3.1 Procedure

 Connect tapware to test circuit ;

 open the stop valve with the outlet of the urinal valve closed and generally facing downwards ;

 apply a static water pressure of (0,4 ± 0,02) MPa ((4 ± 0,2 bar) for (60 ± 5) s ;

 apply a static water pressure of (0,02 ± 0,005) MPa ((0,2 ± 0,05) bar) for (60 ± 5) s

8.2.3.2 Requirements

There shall be no leakage or seepage through the walls for the duration of the test

8.3 Leaktightness tests - Summary table

Table 6 — Summary of leaktightness tests

Leaktightness of: Position of

stop valve

Outlet opening

Pressure Duration Requirements

Closed Open (0,1 ± 0,01) MPa

(1 ± 0,1) bar

60 ± 5 sStop valve

Closed Open (1,6 ± 0,05) MPa

(16 ± 0,5) bar

60 ± 5 s

Upstream ofseat

Closed Open (1,6 ± 0,05) MPa

60 ± 5 sTapware Unit

b c

Opena Closed

(0,020 ± 0,005) MPa(0,2 ± 0,05) bar

60 ± 5 s

No leakage

a In the case of tapware with a system to prevent locking in permanent flow position, carry out the test with the stop valve immobilised mechanically.

b In the case of hydraulic opening valves, the test at 0,02 MPa (0,2 bar) is not mandatory.

c Only for urinal valves

9 Pressure resistance characteristics

The principle of the test consists in detecting any deformation, which may occur in the tapware owing to the action

of cold water at a high pressure

The test is carried out upstream and downstream of the tapware stop valve

In the case of WC valves, the pressure is only applied upstream of the stop valve

NOTE Those valves, which were submitted to tests as 9.2.2 shall not be used for other tests

9.2.1.2 Equipment

The equipment used will be the same as that described in 8.2.1.2

9.2.2 Mechanical behaviour upstream of the seat with the stop valve in the closed position

9.2.2.1 Procedure

Apply a static water pressure of (2,5 ± 0,05) MPa ((25 ± 0,5) bar) for 60 ± 5 s

9.2.2.2 Requirements

There shall be no permanent deformation in the part of the tapware upstream of the seat

Seepage around the fittings is tolerated

9.2.3 Mechanical behaviour downstream of the seat with the stop valve in the open position

This test only applies to urinal valves

9.2.3.1 Procedure

Apply a dynamic water pressure of (0,4 ± 0,02) MPa ((4 ± 0,2) bar) for a period of 60 s with the pressure measured

at the tapware inlet connection

The test is carried out on the tapware as fitted

9.2.3.2 Requirements

There shall be no permanent deformation of the part of the tapware downstream of the urinal valve seat

9.3 Mechanical behaviour tests - Summary table

Table 7 — Summary of mechanical behaviour tests under pressure

Cold water test

Behaviour under pressure of Position of

stop valve

Outletopening

Test conditions Requirements

Pressure DurationUpstream of

seat

Closed Open (Static pressure)

(2,5 ± 0,05) MPa(25 ± 0,5) bar

60 ± 5 s No permanent

deformationupstreamTapware unit

Downstream ofseata

Open Open (Dynamic pressure)

(0,4 ± 0,02) MPa(4 ± 0,2) bar)

60 ± 5 s No permanent

deformationdownstream

a Only for urinals

10 Hydraulic and flow characteristics of WC flushing valves

10.1 General

The tests described below are type tests (laboratory tests) and not quality control tests carried out duringmanufacture

This clause specifies a test method for measuring, for a given pressure :

 the flow rate ;

 the period of flow ;

 the volume of water supplied ;

 the impact force ;

 the value ∆P of the water hammer on closing, and gives the corresponding specifications

10.2 Test method for WC flushing valves

10.2.1 Principle

In order to verify the characteristics defined in 10.1, the curve of flow rate is interpreted as a function of time based

on the readings taken during the tests in 10.3 (Figure 8)

10.2.2 Test apparatus

The test apparatus is made up of 3 parts :

10.2.2.1 A hydraulic circuit

See Figure 6 - Circuit N° 1

10.2.2.1.1 Verification of the test hydraulic circuit

The hydraulic test circuit shall be capable of supplying the valve to be tested in all the test configurations

Verification of the flow rate capacity

By replacing flushing valve “class 9” with a DN25 ball valve with full way through, adjust the DN25 valve so that theinstallation has a flow rate of at least 1,5 l/s at (0,4 +0/-0,01) MPa ((4 +0/-0,1) bar)

After 30 seconds, in dynamic mode, the pressure shall not drop below 0,38 MPa (3.8 bar), nor exceed 0,4 MPa,(4 bar)

Verification of pressure rise

The valve is then closed slowly > 1sec and the static pressure established shall not be greater than 0,6 MPa (6bar)

Verification of rate of increase of flow rate

This is a question of verifying that the installation is capable of supplying a certain flow rate within a certain time, inorder to carry out the test described in 10.3.2 :

The test shall be carried out with a record of the flow rate, the pressure and where necessary the position of valveN° 2

Replace the flushing valve with a DN25 valve N° 1 so the flow rate can be adjusted, and a DN25 spherical valveN° 2 (see Figure 5)

Open valve N° 2 wide and adjust valve N° 1 so that the flow rate in the latter is a steady 1,5 l/s at 1.2 bar

Close valve N° 2 slowly >1sec

Allow the static pressure to stabilise

Open valve N° 2 in less than 50 ms

Verify that the flow rate is established at 1,5 l/s in less than 1 s and does not fall below this value for 10 s