This European Standard specifies a method for determining valve pressure loss coefficient and fluid flow coefficient using water as test fluid.This method is suitable for valves with low zeta values but higher than 0,1 by determining pressure loss, with respect to fluid flow rate and specific gravity, and for valves with equal inlet and outlet nominal size. Industrial process control valves are excluded fromThis European Standard. NOTE 1 For zeta values above 6, the pressure loss coefficient inaccuracy is higher than the pressure loss caused by the test tubes. It becomes the same configuration of tests as in EN 60534-2-3. NOTE 2 If using air as test fluid, other standards e. g. EN 60534-2-3 and ISO 6358 should be referred to.
EN 1267:2012 Referenced Document
EN 1057 Copper and copper alloys - Seamless, round copper tubes for water and gas in sanitary and heating applications
EN 24006:1993 Measurement of fluid flow in closed conduits; vocabulary and symbols (ISO 4006:1991)
EN 736-1:1995 Valves - Terminology - Part 1: Definition of types of valves
EN 736-3:2008 Valves - Terminology - Part 3: Definition of terms
EN ISO 6708:1995 Pipework Components - Definition and Selection of DN (Nominal Size) (ISO 6708 : 1995)
ISO 7-1:1994 Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation
ISO 7194:2008 Measurement of fluid flow in closed conduits - Velocity-area methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes
EN 1267:2012 history
2012EN 1267:2012 Industrial valves - Test of flow resistance using water as test fluid
1999EN 1267:1999 Valves - Test of Flow Resistance Using Water as Test Fluid