The CEN certification of thermostatic radiator valves to acquire the KEYMARK certification mark requires a third-party monitoring of the manufacturing processes. Manufacturers participating in the KEYMARK scheme select an appointed standardisation and certification body which will be responsible for the certification and third-party monitoring of the manufacturing process for the respective manufacturer including all manufacturing sites. The manufacturing processes are monitored annually. The inspector takes product samples of the thermostatic radiator valves to be tested in an approved testing laboratory.
WSPLab has been approved by DIN CERTCO in Germany to inspect the manufacturing process of thermostatic radiator valves. WSPLab also carries out inspections for some companies in China, who have chosen DIN CERTCO as certification institute.
All inspectors involved meet regularly to exchange experiences in order to ensure the high quality and comparability of all inspections.