Brackett Green® Single Entry Drum Screen

Brackett Green® single entry drums screens utilize a rack and pinion drive instead of the chains and rollers commonly used in other drum screens. The A-frame construction provides a light but rigid structure, ideal for seismic requirements. The patented mesh panels and full-contact seals ensure zero bypassing and complete retention and removal of screenings while eliminating hair-pinning or stapling. The units can handle flow rates up to 800 MGD.

Brackett Green® single entry drum screens are a robust, cost-efficient fine screening solution for a wide range of applications. They provide exceptional value due to unsurpassed longevity, with low maintenance and operating costs.

  • Flow capacities up to 35m3/sec
  • Standard screening aperture size ranges from 1.5 mm to 10mm
  • Robust design can sustain differentials up to 2.0m
  • Diameter from 6m to 20m with effective widths up to 6.0m as standard
  • Very low maintenance required

 

Brackett Green® single entry drum screens are engineered to suit the particular operating conditions, water levels and design codes of any installation site. This may include seismic qualification or designs for nuclear safety-related cooling water duty. Other options include a fish recovery and return system, which recovers and returns captured fish unharmed to the water body, as well as adaptations for handling large volumes of jellyfish.

The drum screens have diameters of 6 to 20 meters with widths up to 6 meters. Ovivo can offer either the double entry (DE) flow pattern, used primarily for larger flows (typically ranging from 8 to 45m3/sec) or the single entry (SE) flow pattern, which provides all the advantages of the double entry drum screen but are suitable for flows of less than 10 m3/sec, depending on the specific application. Materials of construction range from coated carbon steel to 316 or duplex stainless steel, with a provision for either sacrificial anode or impressed current cathodic protection.

The Brackett Green® single entry drum screen elimination of the chains, rollers, pins, bushings and seal fins commonly found in traditional drum screens reduces both the energy use and maintenance required in keeping equipment in service.

  • The proprietary, full contact seals ensure zero bypassing and complete retention and removal of screenings greater than the screen aperture, guaranteeing the highest screenings capture ratio in the industry.
  • Brackett Green® drum screens utilize a 9.0mm thick, proprietary and patented ProPaPanel®, which is proven to eliminate hair pinning, or stapling from hair and fibrous debris. Tapered holes minimize potential plugging of the holes from wedged debris and kitchen grease. Screen panels of steel or other metallic mesh with slots or plastic panels of lesser thickness may reduce, but not eliminate hair pinning and often require brush cleaners, greater wash water pressures, water volume and increased service and maintenance.
  • The drum screen’s internal hopper receives screenings that are flushed out by an end-pipe washwater nozzle to external troughing, providing an unimpeded flow out of the screen for dewatering.
  • All Brackett Green® drum screens incorporate a substantial pillow-block bearing assembly with a center shaft to support the screen for both durability and long-term operation.
  • The A-frame construction provides a light, but rigid structure that is suitable when constructed in stainless steel that must be seismically qualified.

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