BS 7942:2000
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Thermostatic mixing valves for use in care establishments
Hardcopy , PDF
English
15-01-2000
31-01-2011
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.
| Committee |
B/504/-/8
|
| DevelopmentNote |
Supersedes 96/107053 DC (10/2005)
|
| DocumentType |
Standard
|
| Pages |
36
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| BS 6465-3:2006 | Sanitary installations Code of practice for the selection, installation and maintenance of sanitary and associated appliances |
| BS EN 1111:2017 | Sanitary tapware. Thermostatic mixing valves (PN 10). General technical specification |
| BS EN 1287:2017 | Sanitary tapware. Low pressure thermostatic mixing valves. General technical specification |
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