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DS/EN 1491:2001
Building valves - Expansion valves - Tests and requirements
This European Standard specifies dimensions, materials and performance requirements (including methods of test) for expansion valves, of nominal sizes from DN 15 to DN 40, having working pressures from 0,1 MPa (1 bar) to 1,0 MPa (10 bar). Expansion valves are intended for fitting to the cold water supply of storage water heaters, having a maximum distribution temperature of 95C, for all energy sources.
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Danish Standards [ds]