1、BRITISH STANDARD BS 5779:1979 Specification for Spray mixing taps UDC 621.646.72:621.647.3BS5779:1979 This British Standard, having been prepared under the directionof the Building ServicesStandards Committee,was published underthe authorityof the Executive Boardand comesintoeffect on 31October1979
2、BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference SEB/2 Draft for comment 78/11892 DC ISBN 0 580 10881 3 Cooperating organizations The Building Services Standards Committee, under whose direction this British Standard was prepared, consists of represen
3、tatives from the following Government departments and scientific and industrial organizations: The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of
4、District Councils Department of Health and Social Security Bath Manufacturers Co-ordinating Committee Domestic Solid Fuel Appliances Approval British Gas Corporation* Scheme British Ironfounders Association Environmental Health Officers Association British Plastics Federation* Greater London Council
5、 British Precast Concrete Federation Ltd.* Heating and Ventilating Contractors Builders Merchants Federation* Association* Building Services Research and Information Institute of Plumbing Association Institution of Gas Engineers* Chartered Institution of Building Services* Institution of Public Heal
6、th Engineers* Clay Pipe Development Association Limited Institution of Structural Engineers Consumer Standards Advisory Committee Institution of Water Engineers and Scientists* of BSI National Brassfoundry Association* Convention of Scottish Local Authorities National Federation of Building Trades C
7、opper Development Association* Employers Council of British Ceramic Sanitaryware National Water Council* Manufacturers* Royal Institute of British Architects Department of the Environment Building Royal Society of Health Research Establishment Scottish Development Department Department of the Enviro
8、nment Housing Trades Union Congress and Construction Water Companies Association* Department of the Environment (PSA)* Department of the Environment Water Engineering Division including Water Data Unit* Association of Gas Equipment Manufacturers Institution of Municipal Engineers and Contractors Ins
9、titution of Production Engineers Association of Manufacturers of Domestic National Association of Plumbing, Heating and Electrical Appliances Mechanical Services Contractors BNF Metals Technology Centre Plastics Bath Manufacturers Association British Bath Manufacturers Association South London Conso
10、rtium British Valve Manufacturers Association Thames Water Authority Metropolitan Copper Tube Fittings Manufacturers Water Division Association Water Research Centre Department of Prices and Consumer Protection Metrology Quality Assurance and Standards Division Amendments issued since publication Am
11、d. No. Date of issue CommentsBS5779:1979 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii Section 1. General 1 Scope 1 2 References 1 3 Definitions 1 4 Materials 1 5 Marking 2 Section 2. Dimensions, design and construction 6 General 2 7 Nominal size 2 8 Inlets 2 9
12、 Spray outlet 2 10 Flow restrictor 2 Section 3. Type testing 11 General 2 12 Rate of flow test 4 13 Test for divergence of the spray 4 14 Sensitivity of control of single control type spray mixing taps 4 15 Devices to prevent cross tracking intercommunication of supply systems 5 16 Blended water tem
13、perature extremes 5 Appendix A Notes on the installation of spray mixing taps 7 Appendix B Types of spray mixing taps with reference to relevant clauses 7 Appendix C Information to be supplied by the purchaser 7 Appendix D Method of setting manually adjustable restrictors 7 Appendix E Method of meas
14、uring the rate of flow through spray mixing taps fitted with manually adjustable flow restrictors 9 Appendix F Method of measuring the rate of flow through spray mixing taps fitted with self-adjusting restrictors 10 Appendix G Method of measuring the divergence of the spray 11 Appendix H Method for
15、the determination of sensitivity of control 12 Appendix J Method for the determination of resistance to cross tracking 12 Appendix K Method of measuring the achievable blend of water temperature extremes 13 Figure 1 Installation and dimensional features of spray mixing taps 3 Figure 2 Sectional diag
16、ram of spray, spray outlet and annular gauge 4 Figure 3 Typical sensitivity curve for single control type spray mixing taps 5 Figure 4 Blended water temperature extremes 6 Figure 5 Details of pressure take-off tee 10 Figure 6 Blended water temperature test apparatus 11 Table 1 Dimensions of pressure
17、 take-off tee 10 Publications referred to Inside back coverBS5779:1979 ii BSI 12-1999 Foreword This standard, prepared under the direction of the Building Services Standards Committee, is linked with BS1010-1 and BS1010-2, BS1415-1, BS5388 and BS5412 b) the number of this British Standard, i.e.BS577
18、9; c) the character “H” on the hot water inlet and the character “C” on the cold water inlet. Alternatively, the inlets may be colour coded: red for hot water and blue for cold water. 1) Additional markings are not precluded, e.g.BS1010-1 and BS1010-2, BS 1415-1, BS5412 or BS5413. Section 2. Dimensi
19、ons, design and construction 6 General The design and construction of spray mixing taps of either wall type (vertical mounting) or pillar type (horizontal mounting) shall be as specified in BS1010-1 or BS1010-2 or BS5412 b) 10 mm outside diameter copper tube; c) 12 mm outside diameter copper tube; d
20、) G); e) G“. 9 Spray outlet The spray mixing tap shall be provided with a spray outlet capable of causing the water to assume the shape of a diverging spray. The cone shall not diverge to an extent greater than that shown inFigure 2 when the mixing valve is fully opened. Every waterway in the spray
21、outlet shall be capable of accepting a 1mm nominal diameter probe manufactured from steel complying with the requirements of BS1407. The spray outlet device shall be capable of being removed for cleaning, but only by the use of a special tool. 10 Flow restrictor A flow restrictor shall be provided i
22、n the spray mixing tap. The flow restrictor shall be either manually adjustable or of the self-adjusting type and shall satisfy the flow requirements specified in clause12, andAppendix D. The manually adjustable type flow restrictor shall be in such a form that it can be adjusted or changed without
23、removing the spray mixing tap from the wash basin or wall, but cannot be so adjusted without the use of a special tool. Section 3. Type testing 11 General Spray mixing taps shall be capable of passing the tests specified in BS5412 b) twin (or dual) control spray mixing tap (see3.3); c) single contro
24、l, twin (or dual) function, spray mixing tap (see3.4); need not comply with the requirements of the endurance test in 10.1 of BS5412 b) not less than10% and not more than90% shall enter the inner annulus; c) the remainder shall enter the centre cylinder. The inner annulus shall be evenly divided int
25、o four sections each with its own separate take-off point. Each of the four inner annulus take-off points shall collect between15% and30% of the water flowing into the inner annulus. This specific flow requirement shall not apply to spray mixing taps with self-adjusting restrictors. 14 Sensitivity o
26、f control of single control type spray mixing taps This clause applies to single control type spray mixing taps only, i.e.excluding combination spray mixing taps. Under the test conditions described inAppendix H (see alsoFigure 3) the range of regulation shall be such that a1 C temperature variation
27、 of the mixed water, in the mixed water temperature zone of38 C to43 C, shall be obtained, either a) by a minimum linear movement of1.5mm at the end of the lever; or b) by a minimum angular movement of2 of the control handle. The test shall be conducted with hot and cold inlet supply pressures set e
28、qually at0.27 bar 2)and with blended water set at a flow rate of between0.03litre/s and 0.06litre/s, and with cold water temperature at10 C and hot water temperature at70 C. If the incoming cold water temperature is different from the10 C specified, this difference shall be added to, or subtracted f
29、rom, the blend temperature range (38 C to 43 C) as well as the hot water temperature of70 C. (See alsoFigure 3 andK.3.1.) NOTE 1Walls of annular gauge to be not more than1mm thick. NOTE 2Drawing is diagrammatic only. Figure 2 Sectional diagram of spray, spray outlet and annular gauge 2) 1 bar = 10 5N/m 2= 100 kPa.
