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Standards Development
This document specifies requirements and test methods for factory made thermally insulated bonded valve assemblies for hot water networks in accordance with EN 13941-1, comprising a steel valve, valve extension pipes, polyurethane (PUR) foam thermal insulation and a casing of polyethylene.
The valve assembly may also include the following additional elements: measuring wires, spacers and diffusion barriers.
The standard is
- adapted to the structure of EN 253;
- harmonized with the standards of CEN/TC107;
o the valves shall be designed for an operating pressure of 2.5 MPa;
- adapted to the state of the art;
o the requirements for the valve extension pipes are specified;
o for the leak-tightness of the seat of the unloaded valves up to DN 400, a distinction is no longer made between different leakage rates.
Note: in case the WI is based on documents from other organizations than ISO/IEC, please specify it here
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