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General
Certification encompasses type testing every four years and annual control testing as well as assessment of the quality assurance system of thermostatic radiator valve manufacturers. Where such valves comply with the requirements given in EN 215 and undergo inspection in accordance with the Keymark certification scheme, they are permitted to bear the KEYMARK registered mark of conformity, illustrated below.
![]() The recognized testing laboratories are accredited to EN ISO/IEC 17025 to carry out tests for TRVs according to EN 215 and take part in periodical Round Robin Tests supported by the Monitoring Group.
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