Key Features
- High Load Capacity: Pultruded or vacuum-infused FRP construction with 24 oz woven roving makes troughs ~50% stronger than typical mild steel or 1/4″ thick alternatives.
- Corrosion Resistance: Pure FRP material and resin (isophthalic/vinyl ester) resists deterioration in damp, chemically active environments.
- Custom Shapes & Sizes: Manufactured in any shape (flat, V-shaped, round-bottom) and size to fit circular or rectangular tanks.
- Integral Weir Flanges: Built-in weir lips (straight, V-notch, circular, or finger-weir) ensure precise overflow crest level and uniform discharge.
- Lightweight Modular Panels: Modular sections with tongue-and-groove or flange joints allow field assembly and future expansion.
- Accessories and Covers: Optional FRP outlet boxes, slip joint drains, ladder brackets; removable FRP or aluminum covers to block debris/UV.
Benefits
- Outstanding Strength & Stiffness: Engineered design handles traffic loads and conforms to AWWA and process requirements.
- Maintenance-Free Service: The FRP surfaces will not corrode, warp, or require painting; virtually no maintenance over 20+ year life.
- Efficient Flow: Smooth FRP interior minimizes flow resistance, ensuring accurate overflow measurement and reduced turbulence.
- UV Protection: Gel coats block ultraviolet light, preventing premature aging and algae growth in sun-exposed locations.
- Rapid Installation: Lightweight panels and fewer support requirements shorten construction time; large continuous panels reduce joints and installation labor.
Applications
- Clarifiers & Sedimentation Tanks: Effluent launders in primary, secondary, tertiary clarifiers and filtration basins.
- Effluent & Filtrate Channels: Conveying filtered water in water treatment and backwash flow recovery systems.
- Grit Chambers & Scum Troughs: Channels in grit removal or scum collection systems where corrosion and abrasion occur.
- Sludge Holding Basins: Runoff gutters where sludge wash or residual flow is collected.
- Chemical Feed/Drainage Troughs: In neutralization or equalization units handling corrosive streams.
Technical Specifications
- Construction: Composite laminate typically 2–4 layers of fiberglass (roving/mat) with isophthalic polyester or vinyl ester resin, reinforced with FRP angles for flanges.
- Liner: Pure resin-rich inner gelcoat (0.5–1 mm) to resist corrosion and provide a smooth finish.
- Thickness: Overall thickness 10–25 mm or more depending on span; critical areas (corners, flanges) up to 1.5× base thickness.
- Standards: NSF-61 approved for potable water use in clarifiers; built to AWWA C950 (Fiberglass troughs) standards.
- Supports: FRP or stainless steel brackets (316 SS recommended) spaced per design loads; connections with SS hardware to avoid galvanic issues.
- Color/Finish: Standard light grey or white; custom colors for visibility or branding.
Unique Selling Points (USPs)
- Engineering Excellence: We design the launder and weir as an integrated system, optimizing overflow uniformity and minimizing backside leakage.
- Rapid Prototype to Production: Using CAD and FEA tools, we guarantee dimensionally accurate parts, minimizing on-site adjustments.
- Comprehensive Kits: Each launder system includes all trough sections, weir plates, outlet boxes, support brackets, spacers, and fasteners – ready for turnkey installation.
- NSF/AWWA Certification: Our FRP launders meet drinking-water standards, assuring safety and quality, even though used in wastewater applications.
- Custom Flow Profiles: We can incorporate non-standard weir shapes (finger weirs, variable crest weirs) or perforations as needed for unique flow control.