NEFCO is the world leader in the design and development of Stamford Density Current Baffle Systems, baffles specifically designed to intercept these currents and redirect their flow back into the center of the tank. The NEFCO Baffle has been called '... the most cost-effective improvement in baffle performance available today.'

NEFCO recently completed an extensive Computational Fluid Dynamics (CFD) study of baffle design and performance that resulted in the development of two advanced baffle systems that represent the first improvement in baffle performance in nearly thirty years:

For more information on NEFCO's CFD Study, click here

Stamford Baffle 2.0 offers an unprecedented improvement in clarifier performance in terms of reduced TSS and increased hydraulic capacity. Computer modeling predictions developed during NEFCO’s CFD study indicated that Stamford Baffle 2.0 would reduce effluent solids by 30% to 50% over the original Stamford Baffle, as shown in the figure below. Actual field results at a recent installation confirmed that Stamford Baffle 2.0 reduced total suspended solids by nearly 80% and enabled that treatment plant to achieve a 35% increase in overall hydraulic capacity.

Stamford Baffle 2.0 features a 30° inclination angle as measured down from the horizontal and a greater horizontal projection from the clarifier wall, calculated as a function of the clarifier diameter. The shallow angle increases the baffle-to-blanket distance and deflects the density currents on a more horizontal trajectory (without increasing solids buildup on the baffle), while the increased projection of the baffle intercepts a greater volume of solids rising toward the launder.

Stamford Baffle 2.0 retains all of the features that made the original NEFCO Stamford Baffle the best selling baffle system in the world. Stamford Baffle 2.0 is comprised of individual baffle sections or 'modules'. Each module combines the baffle panel, the baffle bracket, the vents and the mounting and stiffening flanges in a one-piece molded fiberglass unit eight feet long that offers a number of advantages:

• The one-piece, modular design cuts installation time in half. The individual baffle modules align easily and require fewer fasteners.
• The integrally molded bracket and other reinforcements means one bracket per panel. Some baffles require two brackets per panel and others attempt to cantilever their baffle from the tank wall without benefit of support brackets.
• The vents are molded into the baffle's horizontal mounting flange. All other baffles have holes cut in the laminate and sealed - a secondary operation that creates the possibility of water intrusion and de-lamination.

The baffle modules are attached to the tank wall or the corner of the inboard launder with stainless steel anchors. Mounting holes are factory drilled and sealed. Adjacent modules fasten together at a molded recess that forms a ship-lapped joint. Sections of the baffle may be cut as required to fit around piping and other obstructions. The baffle's laminate features a tough, corrosion-resistant and uv-suppressed fiberglass resin specifically formulated for use in industrial and municipal waste treatment applications.

The Stamford Baffle 2.0 Baffle System is readily converted to NEFCO’s new Dual Surface Baffle. This dual surface configuration is designed for larger clarifiers operating at very high flows, including combined sewer configurations.

• Reduces clarifier TSS by as much as 70%
• Reduces turbidity
• Improves hydraulic capacity
• Installs in half the time of other baffles

• Increased horizontal projection
• 30° Inclination angle
• Integrally molded bracket
• Rugged construction
• Corrosion resistant
• 5 Year warranty

NEFCO has recently completed a multi-year CFD Baffle Design Study that led to the development of Stamford Baffle 2.0, which is over 30% more effective than the original 45o Stamford Baffle. The new 30o baffle will improve clarifier performance by reducing overflow TSS as much as 70%!