This arrangement creates a resistance or barrier for the sand particles in the intake air and thus settles down. The sand could be drained through the drain holes or collected in a tray. nSand trap louvers are available with optional accessories such as bird screen, insect screen, aluminium mesh filter, volume control damper. The above model is available with 1” or 2” aluminium mesh filter, and synthetic filters are also available. nSand trap louvers are ideal in areas where the intake air velocities do not exceed 1 m/sec. Airmaster strongly recommends high efficiency sand trap louver for higher air intake velocities n