Sand Trap Louvers OSTL 300 SERIES. Sand Trap Louvers

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1 Model : OSTL GI 341 Description: OPTIMA make Sand Trap Louver is used as pre-filter for the protection of air conditioning plants in area exposed to extreme levels of industrial pollution. It has a high degree of separation capability of sand and large dust particles, even in case of high dust concentrations. The vertically arranged sections and holes for sand drainage ensure the sand trap louver is self-cleaning and maintenance-free. The STL is designed to separate large particles at low air velocities, thus avoiding excessive dust loading of conventional filters. It s not intended as a substitute for conventional supply air filtration plant. For bigger sizes, several sections can be combined to provide any combinations of overall width W or height H. STL with H 1950 mm to 3900 mm are split on height and supplied with additional sand chute, loose for fitting on site by others. The additional support for reinforcement and assembly of the sand trap louvers with W 1950 mm to 3900 mm are also split and supplied with a loose channel section to cap the vertical joint, channel to be fitted on site by others. Single Section Sizes Performance Data - The filtration performance is dependent on the dust type and the velocity of the air. APPLICATION: The sand trap louver is used at the fresh air inlet duct of the air handling unit. It can lower the dust loading of conventional filtration as it is designed to separate large size sand particles at low to medium speeds. It is also fitted with a bird screen mesh protect against the unwanted objects. The sand trap louver is a self emptying system. It has a set of holes at the bottom face of the casing to discharge separated sand particles. OUT STANDING FEATURES: Designed for intake applications to separate sand from intake air. A typical efficiency / Performance data is shown in Fig. enclosed. Provided with self emptying sand drain holes from the base. Choice of either galvanized steel or aluminum construction. Variety of Bird and Insect Screen.

2 Model OSTL GI 341 STANDARD MATERIALS AND CONSTRUCTION: Frame : 1.2 mm thick GI steel sheets G-90, Zinc coating Z-275 as per ASTM653 Standard Blades : 0.9 mm to 1.2 mm thick GI steel sheets G-90, Zinc coating Z-275 as per ASTM653 Standard Assembly : Mechanically fastened with GI rivets of size 4.8 mm x 12 mm. Bird Mesh : ½ x ½ x diameter wire OR 12 mm x 12 mm x 1 mm diameter wire GI mesh PVC coated Finish : Mill Finish or Powder Coated. OPTIONS: Powder Coated or Spray paint Finish Variety of Bird and Insect Mesh. Options in thickness of GI material up to 2 mm Can be factory supplied with as a special assembly of Wire Mesh, VCD, Sliding AL Filter (detachable). DIMENSIONS: Width W and Height H are opening dimensions. STL is provided with approximately ½ undercut. Shipping weight is approximately 4 lbs/sq.ft. STL sizes : Standard sizes are as below. Other sizes are optional. Min. size panel = 12 W x 10 H Max. Single Panel = 96 W x 48 H OSTL - GI 341 Sections : Standard sections for STL are shown. Other sections supplied as optional Model: OSTL GI

3 Model OSTL AL 341 STANDARD MATERIALS AND CONSTRUCTION: Frame : 1 mm thick nominal; 6063-T6 extruded aluminum alloy. Conform to BS1474 Blades : 1 mm thick nominal; 6063-T6 extruded aluminum alloy. Conform to BS1474 Assembly : Mechanically fastened with AL Rivets 4.8 mm x 12 mm. Screen : ½ x ½ x inch diameter wire OR 12 X 12 X 1 mm AL coated wire Finish : Mill Finish or Powder coated OPTIONS: Powder Coated or Anodized Finish Variety of Bird and Insect Screen. Options in thickness of extruded Aluminium section up to 2 mm Can be factory supplied with as a special assembly of Wire Mesh, VCD, Sliding AL Filter (detachable). DIMENSIONS: Width W and Height H are opening dimensions. STL is provided with approximately ½ undercut. Shipping weight approximately 4 lbs/sq.ft. STL sizes: Standard sizes are as below. Other sizes are optional. Min. size panel = 12 W x 12 H Max. Single Panel = 60 W x 60 H OSTL- AL 341 Extruded Sections : Dimensional Tolerance as per EN: , EN Heat Treatment : Webster Hardness # 11-13, Solution heat treated and age hardened. Model: OSTL AL 341C (With Sand Chute)

4 Assembly Sketches: VERTICAL SECTION HORIZONTAL SECTION SINGLE SECTION WITH SAND CHUTE MULTIPLE SECTION WITH SAND CHUTE

5 PRESSURE DROP: Data for inlet application with rear duct or plenum connection SAND REMOVAL EFFICIENCY:

6 PERFORMANCE DATA: The filtration performance is dependant on the dust type and the velocity of the air. Particles Size Filtration Efficiency in % Range at 1.0 m/s at 2.0 m/s approx. 30 Selection: SELECTION EXAMPLE: For normal operation conditions the sand trap louvers should be rated for a face velocity of approximate 1.0 m/s Volume Flow with a face velocity of 1.0 m/s : 2430 l/s (8750) Cu.m. /h Area of louver required : approx. 2.4 M. Sq. Dimensions selected: Width Height Pressure drop : W = 1800 mm : H = 1350mm : approx. 30 Pa

7 FRESH AIR INTAKE SYSTEM WITH SAND TRAP LOUVER

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