NSF - 61 - Density Current Baffle (DCB) Brochure

Page 1 SECTION 11205 DENSITY CURRENT BAFFLE PRODUCT SPECIFICATIONS DENSITY CURRENT BAFFLES SECTION 11205 PART 1 GENERAL 1.1 Section Includes A. Density Current Baffles 1.2 Related Sections A. Section 06600 Plastic Fabrications B. Section 11201 Wash Water Troughs C. Section 11204 Weir Plates, Scum Baffles, and Brackets D. Section 11200 Water Supply and Treatment Equipment E. Section 11300 Fluid Waste Treatment and Disposal Equipment 1.3 References A. ANSI/AWWA F101-07: American Water Works Association for Contact Molded Fiberglass Reinforced Plastic, Wash Water Troughs and Launder B. ANSI: American National Standards Institute 1. ASTM D-256; American Standard Test Methods for Determining the Pendulum Impact Resistance of Notched Specimens of Plastics. 2. ASTM D-570; American Standard Test Methods for Water Absorption of Plastics 3. ASTM D-618; American Standard Test Methods Practice for Conditioning Plastics and Electrical Insulating Materials for Testing 4. ASTM D-638; American Standard Test Methods for Tensile Properties of Plastics 5. ASTM E 831; American Standard Test Methods for Coefficient of Linear Thermal Expansion of Plastics Between –30 Deg C and 30 Deg C. 6. ASTM D-790; American Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials 7. ASTM D-2583; American Standard Test Methods for Indentation Hardness of Rigid Plastics by Means of a Barcol Impresser. 1.4 Submittals A. Section 01300 submission provisions. B. Product property data generated from the fiberglass reinforced plastic contact- molded composite laminate. C. Shop Drawings Depict: 1. Critical dimensions, jointing and connections, fasteners and anchors. 2. Materials of construction. Page 2 SECTION 11205 DENSITY CURRENT BAFFLE 3. Sizes, spacing, and locations of structural components, connectors, attachments, adjustments, openings, and fasteners. D. Samples: Six (6) inch square sample of fiberglass reinforced plastic laminate at the proper thickness and produced in the same manner as the molded density current baffle. E. Manufacturer’s installation instructions. 1.5 Delivery, Storage, and Handling A. Manufacturer will provide the product banded on skids or other suitable packaging for ease of handling and to minimize damage during shipping. At the project site, store the product indoors out of the way of construction activities. PART 2 PRODUCTS 2.1 Manufacturer A. MFG Water Treatment Products Company, 55 Fourth Avenue, PO Box 458, Union City, Pennsylvania 16438. B. Requests for substitution will be considered in accordance with provisions in Section 01600. C. The manufacturer and supplier of the material shall be NSF 61 Certified. D. Manufacturer and supplier shall supply a performance bond. 2.2 Density Current Baffles A. Material: Fiberglass reinforced isophthalic polyester resin contact-molded composite laminate, nominal (see note (a) below) thickness; the surfaces shall have a gel-coat resin finish, gel-coat to contain the ultraviolet inhibitor. All cut edges shall be sealed with polyester resin. a. Baffle thickness to be determined by the depth of the baffle. 1. Glass Type E, random chopped with chrome or silane finish, a binder compatible with the resin, glass strand length one (1) inch minimum. 2. Adequate contact molding pressure ensures complete resin wet-out of glass fibers. 3. Fiberglass fiber weight, nominal 20 percent. 4. Physical Properties: Per AWWA a. Tensile Strength (ASTM D-638): 12,000 psi, minimum b. Flexural Strength (ASTM D-790): 19,000 psi, minimum c. Flexural Modulus (ASTM D-790): 900,000 psi, minimum d. Izod, Notched (ASTM D-256): 13 ft-lb/in, minimum e. Barcol Hardness, ASTM D2583: 35, minimum f. Water Absorption, ASTM D 570: .20 percent, minimum 5. Meets ANSI/AWWA F101-07 property requirements. 6. Color: MFG Water Treatment Products Company Aqua. Page 3 SECTION 11205 DENSITY CURRENT BAFFLE B. Baffle Panels: 1. Fabricated of contact molded fiberglass reinforced polyester resin composite laminate having a nominal (see note (a) below) thickness and a 15-mil minimum gel-coat thickness on both sides. a. Baffle thickness is determined by depth of the baffle. 2. Baffle panels should not to exceed 12’-0” in length. 3. Integral molded 3/8-inch top edge mounting flange 6 inches in height with pre-drilled holes to accommodate anchors for mounting to tank walls. 4. Integral molded 90 Deg 3/16 inch thick bottom flange return 3 inches in width and the full length of the baffle panel. 5. Baffle face slopes 45 degrees from circular tank vertical wall. 6. Baffle panels straight for rectangular tanks and curved for round tanks, curved according to the tank radius shown on drawings. 7. Manufacturer supplies pre-drilled slots on one panel side for in field drilling of holes through slots into adjoining baffle panel for final “ship-lap” connection. 8. All cut edges and drilled holes to be resin coated with manufacturer’s sealant. 9. Baffles with integral molded end supports are not acceptable. C. Mounting Fasteners: 3/8 inch diameter wedge anchor bolts and ¼” fasteners of Type 304 or 316 stainless steel. PART 3 EXECUTION 3.1 Examination A. Baffle panel dimensions require verification and project site conditions must be suitable for installation. Unsatisfactory site conditions must be corrected before product installation. 3.2 Installation A. Install in accordance with manufacturer’s instructions, approved shop drawings and in true and proper alignment. B. Adjust panels per contract documents or as directed by the site Engineer. C. When necessary to adjust lengths of baffle panels due to field conditions and when approved by the site Engineer, seal cut or machined edges thus exposed with manufacturers supplied sealant. Excessive cutting will not be acceptable. 3.3 Adjust and Clean A. Surfaces to be cleaned according to manufacturer’s instructions. B. Remove excess materials of construction and trash to leave site in a clean condition for subsequent operation. END OF SECTION