BS EN 15092:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Materials and surface finishes
   4.1 General
   4.2 Nature of materials
5 Design and dimensional requirements
   5.1 Backflow prevention
   5.2 Dimensional characteristics
   5.3 Set temperature adjustment
   5.4 Temperature override function
6 Mechanical tests and requirements
   6.1 Body strength test
   6.2 Bending moment test for tempering valves
   6.3 Torque tests for temperature stops
7 Performance tests and requirements
   7.1 General
   7.2 Standard test conditions
   7.3 Verification of valve temperature settings
   7.4 Determination of minimum flow rate
   7.5 Test for temperature stability starting
        from ambient
   7.6 Test for temperature stability with
        changing flow rates
   7.7 Test for thermal shutoff with cold water
        supply failure
   7.8 Test for temperature stability with changing
        inlet pressure
   7.9 Test for temperature stability with changing
        inlet temperature
   7.10 Endurance test on the thermostat
8 Acoustic tests and requirements
   8.1 General
   8.2 Test method
   8.3 Expression of results
   8.4 Requirements
9 Classification
10 Designation
11 Marking
   11.1 Temperature marking
   11.2 Flow marking
   11.3 Identification marking
12 Instructions
Annex A (informative) - Apparatus for endurance test
                        on thermostat
Annex B (informative) - Apparatus for performance test
Annex C (normative) - Measurement of parameters
Annex D (informative) - Temperature transient requirements
Bibliography

Describes dimensions, materials and performance requirements (including methods of test) for in line hot water supply tempering valves for sanitary hot water systems, of nominal sizes from DN 15 to DN 50.

This European Standard specifies dimensions, materials and performance requirements (including methods of test) for in line hot water supply tempering valves for sanitary hot water systems, of nominal sizes from DN 15 to DN 50. Tempering valves reduce the temperature of sanitary hot water for distribution throughout the hot water system. The conditions of use are specified in Table 1. The valves are intended to be used with storage water heaters to provide tempered hot water to the terminal fitting. They are not intended to control the temperature at the point of use. Tempering valves control the distribution temperature from a water heater to a preset value or an adjustable range, both between 45 °C and 65 °C. Table 1 - Conditions of use