Designed to filter sand particles at high intake velocities, with high efficiency which is more than 90% and lesser Pressure drop. It has the advantage of more free area so that sizes of usual sand trap lowers can be reduced to 25% of the normal sizes Composed of a row of blades mounted vertically inside the frame. Designed to separate sand and dust from the air stream. The filtered sand will be drained through a sand chute flied at the bottom of the louver. Generally used for ventilation applications and at inlet duct of air handling unit