EVS-EN 13181:2001

This standard specifies a method for measuring the sand rejection efficiency of sand trap louvres subjected to simulated sand and with air flow through the louvre under test. The standard considers a 1000 mm x 1000 mm section of sand trap louvre, or the nearest possible blade increment, for evaluation purposes.
The purpose of the test incorporated in this standard is as follows: -
a) Sand Rejection Effectiveness
    To establish the sand rejection effectiveness when subjected to various air flow rates   through the assembly.
b) Discharge Loss Coefficient/Pressure Requirement
    To establish the air pressure loss through the sand trap louvre at various air flow rates and     by calculation Discharge Loss Coefficient.