BS 7942:2011
$198.66
Thermostatic mixing valves for use in care establishments. Requirements and test methods
| Published By | Publication Date | Number of Pages |
| BSI | 2011 | 60 |
This British Standard specifies performance and material requirements and gives test methods for three types of TMV, of nominal size up to and including DN25, for use in care establishments. The TMVs covered by this standard are those which are suitable for the hot and cold water supply pressures and temperatures given in Table 1, and those which are suitable for the applications given in Table 2.
Annex A to Annex E give the apparatus and test methods for the durability of TMVs, Annex F to Annex M and Annex O to Annex S give the apparatus and test methods for the performance of TMVs. Annex N gives an assessment of transient values, Annex T gives a summary of thermal performance requirements and Annex U and Annex V give recommendations for commissioning and in-service tests.
Table 1 TMV general use conditions
Table 2 Mixed-water temperature
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | Table 1 TMV general use conditions |
| 8 | Table 2 Mixed-water temperature |
| 11 | Figure 1 Specimen test sequences |
| 15 | Table 3 Test pressures for manual diverters |
| 16 | Figure 2 Hydraulic resistance for low pressure diverters with automatic return Table 4 Test pressures and hydraulic resistances for diverters with automatic return |
| 19 | Table 5 Flow rates |
| 20 | Table 6 Mixed-water temperature settings for determination of flow rate and sensitivity |
| 21 | Table 7 Initial settings for thermal performance tests |
| 22 | Table 8 Permitted duration of transient mixed-water temperature rise |
| 24 | Table 9 Leakage flow of cold water Table 10 Changes in water supply pressure and permitted temperature change |
| 25 | Table 11 Changes in water supply temperature and permitted temperature change Table 12 Reduced flow rates and permitted temperature change |
| 26 | Table 13 Designation codes |
| 28 | Figure A.1 Test rig for durability test on thermostat |
| 30 | Figure A.2 Pressure take-off tee Table A.1 �Dimensions of pressure take-off tees Dimensions in millimetres |
| 32 | Table B.1 Pressure of water supply for durability tests |
| 35 | Table E.1 Settings for thermostat durability test |
| 37 | Figure F.1 Test rig for performance tests |
| 48 | Figure N.1 Example of transient temperature variation |
| 53 | Table S.1 Maximum margins of failure |
| 54 | Table T.1 Summary of thermal performance requirements for each sample |
| 56 | Table U.1 Recommended maximum continuous temperature during site tests |
