Bsi bs en 01287 1999 (2000)

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This British Standard, having

been prepared under the

direction of the Sector

Committee for Building and Civil

Engineering, was published under

the authority of the Standards

Committee and comes into effect

on 15 September 1999

Amendments issued since publication

10964corrigendum No 1

This British Standard is the English language version of EN 1287:1999 It supersedes

BS 1415-2:1986 which is withdrawn

The UK participation in its preparation was entrusted by Technical CommitteeB/504, Water supply, to Subcommittee B/504/8, Terminal fittings, which has theresponsibility to:

Ð aid enquirers to understand the text;

Ð present to the responsible European committee any enquiries on theinterpretation, or proposals for change, and keep the UK interests informed;

Ð monitor related international and European developments and promulgatethem in the UK

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 publicationsreferred to in this document may be found in the BSI Standards Catalogue under thesection entitled ªInternational Standards Correspondence Indexº, or by using theªFindº facility of the BSI Standards Electronic Catalogue

A British Standard does not purport to include all the necessary provisions of acontract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

European Committee for StandardizationComite EuropeÂen de NormalisationEuropaÈisches Komitee fuÈr Normung

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

ICS 91.140.70

English version

Sanitary tapware Ð Low pressure thermostatic mixing valves Ð

General technical specifications

Robinetterie sanitaire Ð Mitigeurs thermostatiques

basse pression Ð SpeÂcifications techniques

geÂneÂrales

SanitaÈrarmaturen Ð Themostatische Mischer fuÈr dieAnwendung im Niederdruckbereich Ð Allgemeinetechnische Spezifikation

This European Standard was approved by CEN on 1 April 1999

CEN members are bound to comply with the CEN/CENELEC Internal Regulationswhich stipulate the conditions for giving this European Standard the status of anational standard without any alteration Up-to-date lists and bibliographicalreferences concerning such national standards may be obtained on application tothe 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 aCEN member into its own language and notified to the Central Secretariat has thesame status as the official versions

CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland andUnited Kingdom

This European Standard has been prepared by

Technical Committee CEN/TC 164, Water supply, the

Secretariat 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 October 1999,

and conflicting national standards shall be withdrawn

at the latest by October 1999

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

7.2 Exposed surface condition and quality of

8.2 Thermostatic mixing valves mounted on

9.3 Leaktightness of the thermostatic mixing

valve upstream of the obturator and of

Page9.6 Leaktightness of the manual diverter of

9.7 Leaktightness of the thermostatic mixing

10.8 Test for temperature stability with

10.9 Test for temperature stability with

11.3 Testing of mechanical performance of thethermostatic mixing valve upstream ofthe obturator Ð Obturator in the closed

11.4 Testing of mechanical performance of thethermostatic mixing valve downstream ofthe obturator Ð Obturator in the open

Table 1 Ð Conditions for the use of low pressure thermostatic mixing valves

Limits of use Recommended limits for correct operation

(0,1 to 1 bar)

0,02 MPa # P # 0,1 MPa (0,2 bar # P # 1,0 bar)

For low pressure thermostatic mixing valves complying with this table there are no acoustical requirements

Low pressure thermostatic mixing valves complying with this standard may also be used with inlet supplypressures in the range from 0,1 MPa to 0,2 MPa (1,0 bar to 2,0 bar) on condition that acoustical performance isnot a requirement of the installation

1)

Introduction

In respect of potential adverse effects on the quality of

water intended for human consumption, caused by the

product covered by this standard

1) This standard provides no information as towhether the product may be used without restriction

in any of the Member states of the EU or EFTA

2) It should be noted that, while awaiting theadoption of verifiable European criteria, existingnational regulations concerning the use and/or thecharacteristics of this product remain in force

1 Scope

This European Standard specifies requirements for

ªlow hydraulic resistanceº thermostatic mixing valves

suitable for use in low pressure water supply systems

as described in informative annex C

This European Standard specifies:

Ð the dimensional, leaktightness, mechanical andhydraulic performance and mechanical endurancecharacteristics with which low pressure thermostaticmixing valves shall comply;

Ð the procedures for testing these characteristics

It is applicable:

Ð to low pressure thermostatic mixing valvesintended for use on sanitary appliances inwashrooms (toilets, bathrooms etc.) and in kitchens;

Ð to low pressure thermostatic mixing valves usedunder the pressure and temperature conditions given

in Table 1

This standard allows for the use of low pressure

thermostatic mixing valves to supply a single outlet or

a small number of outlets in a ªdomesticº application

(e.g one valve, controlling a shower, bath, basin,

bidet) It excludes valves specifically designed for

supplying a large number of outlets (e.g for

institutional use)

NOTE Thermostatic mixing valves intended for use at flow

pressures in excess of those in Table 1 are covered by a separate

European Standard EN 1111.

2 Normative references

This European Standard incorporates by dated orundated references provisions from other publications.These normative references are cited at the

appropriate places in the text and the publications arelisted hereafter For dated references, subsequentamendments to or revisions of any of thesepublications apply to the European Standard onlywhen incorporated in it by amendment or revision Forundated references the latest edition of the publicationreferred to applies

EN 31, Pedestal wash basins Ð Connecting

EN 200, Sanitary tapware Ð General technical

specifications for single taps and mixer taps (Nominal size 1/2) PN 10: Minimum flow pressure

of 0,05 MPa (0,5 bar).

EN 232, Baths Ð Connecting dimensions.

EN 246, Sanitary tapware Ð General specifications

for flow rate regulators.

EN 248, Sanitary taps Ð General technical

specifications for electrodeposited nickel chrome coatings.

EN 695, Kitchen sinks Ð Connecting dimensions.

EN 1111, Sanitary tapware Ð Thermostatic mixing

valves (PN 10) Ð General technical specification.

EN 1254-2, Copper and copper alloys Ð Plumbing

fittings Ð Part 2: Fittings with compression ends for use with copper tubes.

prEN 1717, Protection against pollution of potable

water in drinking water installations and general requirements of devices to prevent pollution by backflow.

ISO 228-1, Pipe threads where pressure-tight joints are

not made on the threads Ð Part 1: Dimensions,

tolerances and designation.

ISO 5167-1, Measurement of fluid flow by means of

pressure differential devices Ð Part 1: Orifice plates,

nozzles and Venturi tubes inserted in circular

cross-section conduits running full.

3 Definition

For the purpose of this standard the following

definition applies

3.1

low pressure thermostatic mixing valve

a valve, with one or more outlets, which mixes hot and

cold water and automatically controls the mixed water

to a user selected temperature The flow rate between

no flow and maximum flow conditions may be effected

either by the same control device or a separate flow

control device, where fitted

4 Classification

This specification covers the following types of low

pressure thermostatic mixing valves:

Type 1 Ð single control: Thermostatic mixing valves

with a single control device for regulating flow rate

and temperature;

Type 2 Ð dual control: Thermostatic mixing valves

with separate control device for regulating flow rate

and temperature;

Type 3 Ð single sequential control: Thermostatic

mixing valves with a single control which operates

through a predetermined sequence of flow and

temperature It shall have a shut-off device;

Type 4 Ð thermostatic mixing valves without flow

control device;

Type 5 Ðother: Thermostatic mixing valves with

special control devices

5 Designation

Low pressure thermostatic mixing valves covered by

this standard are designated by:

Ð their type (see clause 4);

Ð their nominal size (1/2 or 3/4) (see Table 4) with

or without diverter (see Table 2);

Ð their type of body (see Table 2);

Ð their type of nozzle (see Table 2);

Ð the sanitary appliance on which they are to be

used (see Table 2);

In the case of a thermostatic bath/shower mixing valve,the flow rate shall be designated by both flow rateseries The first for the bath outlet, the second for theshower outlet

EXAMPLESingle control thermostatic mixing valve 3/4, withdiverter, visible body single hole, fixed nozzle outlet,bath/shower, horizontal mounting, series 250, L.P

EN 1287

Table 2 Ð Designation

Low pressure thermostatic mixing valves complyingwith this standard shall be permanently and legiblymarked with:

Ð the mark or name of the manufacturer;

Ð the letters L.P (Low Pressure)

6.2 Identification

The temperature control device for the thermostaticmixing valve shall be identified:

Ð by means of a scale and/or symbols;

Ð and/or by colours (cold water blue, hot waterred)

Thermostatic mixing valves shall be legibly markedwith the colour red on the hot water inlet and thecolour blue on the cold water inlet Those withinterchangeable supplies need not be marked

7 Materials7.1 Chemical and hygienic characteristics

All materials in contact with water intended for humanconsumption shall present no health risk up to atemperature of 90 8C They shall not cause anydeterioration in water intended for humanconsumption with regard to food quality, appearance,odour or taste

Within the recommended limit given in clause 1 for

correct operation, the materials shall not be subject toany deterioration which might compromise theoperation of the thermostatic mixing valve Pressurizedparts shall withstand the limits of use set in Table 1

8 Dimensional characteristics

8.1 General comment on drawings

The design and construction of components without

defined dimensions permits various design solutions to

be adopted by the manufacturer

Special cases are covered in 8.5.

8.2 Thermostatic mixing valves mounted on

EN 695;

Ð secondly, give the various options for connectionwith the water supply

8.2.1 Single hole thermostatic mixing valve Ð

Visible body (see Table 3)

8.2.1.1 Without spray attachment [see Figure 1a)]

Figure 1a) Ð Single-hole thermostatic mixing valve without spray attachment

8.2.1.2 With spray attachment [see Figures 1b) and 1c)]

Figure 1b) Ð Single-hole thermostatic mixing valve with remote spray attachment

Figure 1c) Ð Single-hole thermostatic mixing valve with integral spray attachment

Figure 2 Ð Flexible hoses for water supply

Flexible hoses for water supply may be used with the thermostatic mixing valves shown in

Figures 1a), 1b), 1c), 5 and 6

NOTE 1 The inlet connections shown are typical examples only Other methods of connection to the supply are permissible.

NOTE 2 Flexible hoses should comply with the requirement of draft standard, Flexible hoses for water supply (WI 00164121).

Table 3 Ð Single-hole visible body thermostatic mixing valves with or without spray attachment

[see Figures 1a), 1b), 1c)] Ð Thermostatic mixing valves with remote outlet (see Figures 5 and 6)

i.e., orifice with or without flow rate regulator

orifice to the mounting surface

attachment base

valve base

contained in a circle of diameter J

valve to be fitted on to supports of thicknessbetween 1 mm and 18 mm

of 10 or 12

· Plain

· or G 3/8 male or female thread

· or G 1/2 male or female thread

or 12 mm

· or with G 3/8 male or female thread

· or G 1/2 male or female thread

32 max for wash basins, bidets and sinks

Projection of mixing valves base to rear,measured from axis of diameter J

NOTE Dimensions J, T and U are not fixed for baths and are left to the discretion of manufacturer.

8.2.2 Two holes thermostatic mixing valve with visible body mounted on horizontal surface (see Table 4

and Figure 3)

Dimensions in millimetres

Figure 3 Ð Two holes thermostatic mixing valves with visible body on horizontal surface

Table 4 Ð Two hole thermostatic mixing valves with visible body on horizontal surface

as supplied i.e with or without flow rateregulator

orifice to the mounting surface

45 min.: bath

Smallest dimension of the base

valves to be fitted on to supports ofthickness between 1 mm and 18 mm andconnection with the water supply

32 max for wash basins, bidets and sinks

Projection of thermostatic mixing valves base

to rear measured from axis of diameter A

8.2.3 Dimensions of connecting ends (see Figure 4 and Table 5)

If the connecting ends are machined to accept a supply tube (e.g., type 1 or 2) or a spigoted end type 3) thedimensions shall be as given in Table 5

Dimensions in millimetres

Figure 4 Ð Dimensions of connecting ends

Table 5 Ð Dimensions of connecting ends

chamfer and a flat

of 0,3 min at the entry

to the bore

8.2.4 Thermostatic mixing valve with remote outlet (see Table 3)

8.2.4.1 With separate spray attachment

Dimensions in millimetres

Figure 5 Ð Thermostatic mixing valves with remote spray attachment

8.2.4.2 With separate nozzle outlet

Dimensions in millimetres

Figure 6 Ð Thermostatic mixing valve with separate nozzle outlet

8.2.5 Thermostatic mixing valves remotely mounted from sanitary appliance

The design, and dimensions are left to the discretion of the manufacturer The connecting threads shall complywith ISO standards

If the air gap ± dimension E $ 25 mm ± is not complied with, a suitable backflow protection device in accordance

with prEN 1717 is required

8.3 Thermostatic mixing valves mounted on vertical surfaces

The specified dimensions of thermostatic mixing valves define the different configurations for connection to thewater supply

8.3.1 Two holes thermostatic mixing valve with visible body

8.3.1.1 With straight unions (see Figure 7)

Key

1 2

Straight union Mixing valve

Figure 7 Ð Thermostatic mixing valves with straight unions

8.3.1.2 With eccentric unions (see Figure 8)

Key

1 2

Eccentric union Mixing valve

Figure 8 Ð Thermostatic mixing valves with eccentric unions

8.3.1.3 With captive nuts (see Figure 9)

Table 6 Ð Connection dimensions (see Figures 7, 8 and 9)

1) It is permitted to serrate or knurl this thread to assist the retention of sealing tape or compounds In such cases the lower deviation tolerance on the basic major diameter indicated in ISO 228-1 may be increased to 20,35 mm.

The use of deformable washers is permitted.

8.3.2 Outlet dimension (see Figure 10 and Table 7)

Dimensions in millimetres

Figure 10 Ð Outlet dimension

Table 7 Ð Outlet dimension

Dimension Values

mm

Comments

valve can fulfil its function depending on the sanitary appliance for which it isintended

8.3.3 Thermostatic mixing valves with concealed or single-hole body

The design and dimensions are left to the discretion of the manufacturer The connecting threads shall complywith ISO 228-1

8.4 Dimensions of water outlets

8.4.1 Nozzle outlets for use with flow rate

regulators

When nozzle outlets are used with flow rate regulators:

a) conforming with EN 246 dimensions are indicated

in Tables 8 and 9;

b) not conforming with EN 246, those thermostatic

mixing valves are covered by 8.5.

In order to ensure interchangeability of flow rate

regulators, the manufacturing tolerances chosen for the

connecting threads of the outlets shall be compatible

with those of the standard connecting threads of the

flow rate regulators

8.4.1.1 With internal thread (see Figure 11 and

Figure 11 Ð Nozzle outlet for flow rate

regulator with internal thread

8.4.1.2 Nozzle outlet for flow rate regulator with

external thread (see Figure 12 and Table 9)

Table 9 Ð Dimensions for nozzle outlet

Figure 13 Ð Downward shower outlet

1 Bath

Figure 14 Ð Upward shower outlet

Table 10 Ð Shower outlet

Dimension Values

mm

Comments

shower hoses Useful threadlength

There shall be sufficient space between the wall and

the shower connection to allow tightening, release and

appropriate directional adjustment of the shower

connection

8.5 Special cases

8.5.1 Special low pressure thermostatic mixing

valves for installation on horizontal surfaces

Thermostatic mixing valves intended for special

applications e.g for installation on sanitary appliances

not conforming with European Standards or where

dimensional interchangeability is not a

requirement etc., may incorporate dimensional

Ð water can be delivered without undue splashing;

Ð the air gap dimension E $ 25 mm; if E is less

than 25 mm an additional backflow preventiondevice is necessary in accordance with prEN 1717;

Ð the manufacturer's literature including theinstallation instructions supplied with the tapwareindicates clearly that this tapware is a special case

8.5.2 Special low pressure thermostatic mixing

valves for installation on vertical surfaces

Thermostatic mixing valves with a visible bodyintended for special applications, or whereinterchangeability is not a requirement etc., mayincorporate dimensional deviations, provided:

Ð all other requirements of this standard aresatisfied;

Ð sure fixing and watertight connections to thewater supply are achieved and if connection to thepipes is by means of a thread, this shall comply withISO 228-1;

Ð the manufacturer's literature, including theinstallation instructions supplied with the tapware,indicates clearly that this tapware is a special case

9 Leaktightness characteristics9.1 General

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

This clause specifies test methods for verifying theleaktightness of thermostatic mixing valves and givesthe corresponding specifications

c) diverter with manual control (see 9.6) or automatic return (see 9.7) if provided.

Where a diverter with automatic return is regarded asperforming an anti-pollution function it shall comply

with the requirements of clause 14.

9.2.2 Apparatus

A hydraulic test circuit (Figure 15) capable ofsupplying the static and dynamic pressures requiredand of maintaining them throughout the duration ofthe test

9.3 Leaktightness of the thermostatic mixing valve upstream of the obturator and of the obturator

In the case of thermostatic mixing valves without

obturator (type 4, clause 4) the outlet orifice shall be