BS 7942:2000

Committees responsible
      Foreword
      Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Materials in contact with water
5 Types
6 Description of the test sequence
7 Leaktightness
8 Durability
9 Performance
10 Designation
11 Marking
12 Installation and operating instructions
Annex A (informative) Recommendations on commissioning
                      and in-service tests
Annex B (normative) Apparatus for durability test ontat
Annex C (normative) Apparatus for performance tests
Annex D (normative) Additional testing after failure
Annex E (informative) Summary of thermal performance
                      requirements
Annex F (informative) Assessment of transient values
Annex G (informative) Frequency of in-service tests
Annex H (normative) Determination of thermometer response
                    time
Bibliography
Figure 1 - Schematic of test sequence
Figure 2 - Hydraulic resistance for low pressure diverters
           with automatic return
Figure B.1 - Test rig for durability test on thermostat
Figure B.2 - Pressure take-off tee
Figure C.1 - Test rig for performance tests
Figure F.1 - Example of transient temperature variation
Table 1 - Conditions for normal use
Table 2 - Mixed water temperature
Table 3 - Test pressures for manual diverters
Table 4 - Test pressures and flow resistances for diverters
          with automatic return
Table 5 - Supply pressure for durability tests
Table 6 - Settings for thermostat durability test
Table 7 - Flow rates
Table 8 - Mixed water temperature settings for determination
          of flow rate and sensitivity
Table 9 - Initial settings for thermal performance tests
Table 10 - Permitted duration of transient mixed water
           temperature rise
Table 11 - Leakage flow of cold water
Table 12 - Changes in water supply pressure and permitted
           temperature change
Table 13 - Changes in water supply temperature and permitted
           temperature change
Table 14 - Reduced flow rates and permitted temperature
           change
Table 15 - Designation codes
Table A.1 - Guide to a maximum continuous temperature during
            site tests
Table B.1 - Dimensions of pressure take-off tees
Table D.1 - Maximum margins of failure
Table E.1 - Summary of thermal performance requirements for
            each sample

Performance and materials requirements, including test methods, for three distinct types of thermostatic mixing valves for use in care establishments.