Troughs may be square bottom, round bottom or V-bottom, and may include FRP or steel angle laminated into the trough sides or bottom as stiffeners. NEFCO’s trough laminate is 30% stronger than the typical 1/4” trough laminate because we build the reinforcement into every square foot of each trough section. Troughs are designed with corrosion-resistant and UV protected resins, woven roving, balsa, and foam reinforcement, integrally molded stiffening flanges, PVC spacer rods, and slip joint or flange-by-flange connections. Flanges, end panels, and critical areas are 150% thicker than normal. Troughs are engineered and fabricated to meet and exceed load requirements.

Weir pans, also known as finger weirs or serpentine weirs, are mini-troughs designed to increase the weir length in the clarifier. NEFCO pans are made using the same resins and reinforcement used in our standard troughs. V-notched weir plates are mounted to both sides of the weir pan. The weir pans generally mount to the outer tank wall at fixed intervals between sections of the wall-mounted weir, and extend into the clarifier. The pans cantilever from the wall and are supported by an FRP or steel bracket. Weir pans are supplied complete with V-notched panels, support brace, and stainless steel anchors and fasteners.