J+A Hi-FlowTM Screen

The highly efficient configurations of the J+A Hi-Flow™ screen exceed other screens on the market. The continuous band of screening panels are available in 2, 3, 5 or 6 mm perforations to accommodate a wide range of flows, water level and types of effluent. The total capture design has no carryover, and result in a 81% capture rate, with reduced overall headloss. A washwater system including internal rotating brushes remove solids and cleans the screen.
  • 2, 3, 5 and 6mm perforated screening
  • Single machine capacities of up to 3000 l / s (70 MGD)
  • Single pass screening with no carryover
  • Stainless steel construction
  • Vertical lift for small footprint

The J+A Hi-Flow™ screen is available in four screen sizes, with screen apertures of 2, 3, 5 or 6mm. A range of possible screen lengths are available so that each J+A Hi-Flow screen is tailored to meet individual requirements.

Primarily a screen will be selected for its peak duty points. Limitations are placed on the headloss at which the screen will operate, determined by the individual application’s hydraulic characteristics. It is important to select a screen relative to the range of flows, water levels, available channel space and the type of effluent to be screened.

  • High performance solids removal: 81.2% at 6mm (1/4”) perforation
  • Double screening area allows for higher flow rates and capacity
  • Reduced headloss satisfies existing channel requirements

Hi-Flow Screen

  • Elongated band screen, single pass design
  • Total capture of solids due to our headloss-reducing, double screening area
  • Built in bypass
  • 1,2,3 and 6mm all stainless steel perforations
  • Flows of 10l/s up to 3,500l/s, with 5m inlet widths
  • Channel/chamber widths of 0.6m up to 4.0m
  • Screen plate depth along the channel is selected to suit flow and head available
  • Screen construction
  • Spindle and hinge assembly
  • Connecting links made of high density plastic
  • Stainless steel lifting pin and drive pins
  • Screen band driven directly from top support wheels
  • Direct drive-to-wheels, from externally mounted geared motor
  • External water washing of the screen
  • Screened effluent can be used in the deluge system
  • No nozzles to get blocked
  • Low pressure, non-aerosol forming cleaning method
  • Rotating brush inside the top area of the screen rotates and cleans the fouled face of the screen, working in conjunction with the washwater

Can I get a Hi-Flow screen to suit my needs?

The J+A Hi-Flow™ screen is available in four screen sizes, with screen apertures of 2, 3, 5 or 6mm. A range of possible screen lengths are available so that each J+A Hi-Flow screen is tailored to meet individual requirements.

What are the limitations of the Hi-Flow screen?

Primarily a screen will be selected for its peak duty points. Limitations are placed on the headloss at which the screen will operate, determined by the individual application’s hydraulic characteristics. It is important to select a screen relative to the range of flows, water levels, available channel space and the type of effluent to be screened.

Does the Hi-Flow come with an emergency overflow?

Flow rates and channel size, together with the chosen screen size, will allow the arrangement of inlet side seals to be determined. These can be designed to accommodate overflows in excess of design limits, or to operate in the case of emergency. The screen backplate can also be equipped with an opening to act as a bypass overflow to complement the side seal overflows.

How is the screen cleaned?

Removing screened solids and cleaning the screening plates is achieved with a combination of wash water and a rotating nylon bristle brush. Either spray-jetting or gravity deluge may be used. The low pressure, non-aerosol forming deluge method. Screened effluent may be used as washwater, meaning that the device can be cleaned independent of clean water supplies. The final cleaning and polishing of the screening plates is achieved using the brush, which is operated by a separate drive unit.

Can the Hi-Flow screen wash screenings?

All J+A Hi-Flow screens can be equipped with the impeller screenings washing system developed for the J+A Washpactor-Wave system. Screenings are washed by liquefying and so eradicating fecal solids before they are extracted by the screen mechanism.

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