Lijan Greentech Manufactures Louvers for Industrial and Commercial Buildings. Louvers are Required for Good Air Flow or Air Entry to Buildings. We fabricate Standard Size and Custom Made Louvers. Size of Standard Sand Trap Louver is 750 x 450 mm. Sand Trap Louvers Ensure Ventilation in Buildings while Dust Particles are Being Blocked from Entering the Building. It Separates Sand and Large Dust Particles. The Vertically Arranged Sections and Holes for Sand Drainage Ensure that Sand Trap Louver is Self Cleaning and Maintenance Free. Sand Trap Louver is designed to Separate Large Particles at Low Air Velocities. It is not Intended as a Substitute for Conventional Air Filtration Plant. Powder Coated Louvers ensure Corrosion Resistance for Long Time.