scope:

Specifies methods for the testing and rating of dampers and valves used in air distribution systems with pressure differences up to 2000 Pa. The tests incorporated in this standard are: a) leakage past a closed damper or valve; b) casing leakage; c) flow rate/pressure requirement characteristics; d) torque; e) thermal transmittance. The tests specified above apply to the following: a) measurement of leakage past a closed damper or valve; b) measurement of casing leakage; c) determination of flow rate and pressure requirements; d) measurement of torque characteristics; e) measurement of thermal transfer characteristics to determine insulation properties.