Sanitary tapware
BS EN 1287:1999 pdf free.Sanitary tapware – Low pressure thermostatic mixing valves一General technical specifications.
For the purpose of this standard the following definition applies.
3.1low 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 speification covers the following types of low pressure thermostatic mixing valves:
Type 1一 single control: Thermostatic mixing valves
with a single control device for regulating flow rate
and temperature;
Type2 一 dual control: Thermostatic mixing valves with separate control device for regulating flow rate and temperature;
Type 3一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 一 thermostatic mixing valves without flow control device;
Type 5 一 other: Thermostatic mixing valves with special control devices.
5 Designation
Low pressure thermostatic mixing valves covered by this standard are designated by:
一their type (see clause 4);
一their nominal size (1/2 or 3/4) (see Table 4) with or without diverter (see Table 2);
一 their type of body (see Table 2);
一their type of nozzle (see Table 2);
一the sanitary appliance on which they are to be used (see Table 2);
一 the method of mounting (see Table 2);
一their flow rate series (see Table 12);
一the letters LP (Low Pressure);
一reference to this standard EN 1287.
In the case of a thermostatic bath/shower mixing valve,the flow rate shall be designated by both flow rate series. The first for the bath outlet, the second for the shower outlet.
EXAMPLE Single control thermostatic mixing valve 3/4, with diverter, visible body single hole, fixed nozzle outlet, bath/shower, horizontal mounting, series 250, LP EN 1287.
6 Marking — Identification
6.1 Marking
Low pressure thermostatic mixing valves complying
with this standard shall be permanently and legibly
marked with:
— the mark or name of the manufacturer;
— the letters LP. (Low Pressure). 6.2 Identification
The temIxraIure control device for the thermostatic mixing valve shall be identified:
— by means of a scale and/or syinbols
— and/or by colours (cold waler blue, hot water
red).
Thermostatic mixing valves shall be legibly marked with the colour red on the hot water inlet and the colour blue on the cold water mid Those with interchangeable supplies need not be marked.
7 Materials
7.1 Chemical and hygienic characteristics All materiaLs in contact with water intended for human consumption shall present no health risk up to a temperature of 90 CC They shall not cause any deterioration in water rntende(l for human consumption with regard to food quality, appearance, odour or taste.
Within the reconunended limit given in clause 1 for correct operation, the materials shall not be subject to any deterioration which might compromise the operation of the Iherniostatic mixing valve. Pressurized parts shall withstand the Limits of use set in Table 1. Material with inadequate cornsion resistance shall be given additional protection.
7.2 Exposed surface condition and quality of coating
risible chromium plated surfaces and Ni—Cr coatings shall comply with the requirements of EN 248.
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 horizontal surfaces
The standardized dimensions of thermostatic mixing valves:
一firstly, guarantee their mounting and interchangeability on sanitary appliances complying with EN31, EN 32, EN 35, EN 36, EN 111, EN 232 and EN 695;
一secondly, give the various options for connection with the water supply.
8.2.1 Single hole thermostatic mixing valve一Visible body (see Table 3)
8.2.1.1 Without spray attachment [see Figure 1a)]
8.3 Thermostatic mixing valves mounted on vertical surfaces
The specifed dimensions of thermostatic mixing valves define the different configurations for connection to the water supply.
8.3.1 Thwo holes thermostatic mixing valve with visible body
8.3.1.1 With straight umions (see Figure 7)
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 comply with 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 Table 8)
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 deviations, provided:
– all other requirements of this standard are satisfied;
– sure fixing to the mounting surface is provided with all fixing holes covered and watertight connections to the supplies achieved;
— water can be delivered without undue splashing;
— the air gap dimension E 25 mm; if £ is less
than 25 mm an additional backflow prevention
device is necessary in accordance with prEN 1717;
— the manufacturer’s literature including the
installation instructions supplied with the tapware
in(Iicates clearly that this tapware is a special case.
8.5.2 Special lou pressure thermostatic mixing t’alres for installation on rertical surfaces
Themiostatic mixing valves with a visible body intended for special applications, or where interchangeability is not a requirement etc., may incorporate dimensional deviations, provided:
— all other requirements of this standard are satisfied;
— sure fixing and watertight connections to the water supply are achieved and if connection to the pipes is by means of a thread, this shall comply with
ISO 228-1;
— the manufacturer’s literature, including the installation instructions supplied with the tapware, in(lieates clearly that this tapware is a special case.
9 Leaktightness characteristics
9.1 General
The tests (kscnbe(l are type test.s (lalwratoiy tests) arid not quality control tests earned out (luring mant ifacture.
This clause sI)ecifles test niethods for venfying the leaktightness of thermostatic mixing valves and gives the correspon(hng sl)eeiflcations.BS EN 1287 pdf free download.Sanitary tapware