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Homepage>BS Standards>91 CONSTRUCTION MATERIALS AND BUILDING>91.140 Installations in buildings>91.140.60 Water supply systems>21/30430852 DC BS EN 1491. Building valves. Expansion valves. Tests and requirements
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21/30430852 DC BS EN 1491. Building valves. Expansion valves. Tests and requirements

21/30430852 DC

BS EN 1491. Building valves. Expansion valves. Tests and requirements

CURRENCY
LANGUAGE
English
Standard number:21/30430852 DC
Pages:26
Released:2021-02-15
Status:Draft for Comment
DESCRIPTION
This standard 21/30430852 DC BS EN 1491. Building valves. Expansion valves. Tests and requirements is classified in these ICS categories:
  • 91.140.60 Water supply systems
This document specifies dimensions, materials and performance requirements (including methods of test) for expansion valves, of nominal sizes from DN 15 to DN 32, having working pressures ) from 0,1 MPa (l bar) to 1,0 MPa (10 bar). Expansion valves are intended for fitting to the cold potable water supply of storage water heaters, having a maximum distribution temperature of 95 °C, for all energy sources. Expansion valves do not control the temperature and alone do not constitute the protection required for storage water heaters. Expansion valves limit pressure, in the water heaters to what they are fitted, that is produced by thermal expansion of the water. NOTE The use of the device specified in this document does not override the need to use controls (e.g. thermostats and cut-outs) which act directly on the power sources of water heaters (for more information see Annex A).
This product includes: