E. Beaudrey & CIE. products

Screening is a filtration process which separates solids from liquids. Screening plants face nature. There is, as a result, a measure of uncertainty as to what they have to handle, and a safety margin is needed.

To ensure your water intake station is efficient and reliable, it is essential to perform maintenance.

MICROSTRAINING, sometimes also referred to as MICROFILTRATION, MICROSCREENING or MICROSEIVING, is a water-screening process that uses very fine mesh fabrics to arrest all particles larger than the mesh aperture and a large proportion of the particles smaller than the mesh aperture. BEAUDREY pioneered in this field with research starting in 1938 and the first industrial plants in 1950. Since then, the microstrainers have evolved with experience feed-back. BEAUDREY is the company with the largest and most exhaustive experience in this field.

BEAUDREY has the capacity and the experience to successfully renew any existing screening plant, debris filter installation or on-line tube-cleaning system.

BEAUDREY has pioneered in the field of fish protection over the past 60 years. Many systems have been developed over the years; they have been constantly adapted to meet the evolving constraints with regards to environmental protection.

Bar racks with a bar spacing of a few centimeters are installed across water channels to prevent the downstream ingress of divers, medium or large-size debris. They are used on cooling tower outlets and water intakes.

Stoplogs are used to shut off water intake screen pits for dewatering. They are normally lifted with equal levels upstream and downstream.

A penstock is a small to medium-sized watertight sliding/shut-off device meant to isolate a chamber to dewater it, cut or control flow. It is used in all types of plants where water flows in channels or basins (water intake). They are sometimes referred to as sluice gates, slide gates. They are actuated with a level difference between front and back.

The mesh is secured on the panel frame that is slid into the grouted metal wall guides. The water flows across the mesh and the debris are arrested. The screen is lifted out and cleaned when the water flow is interrupted. Installing a second panel in series with the first one makes it possible to lift the panel out for cleaning without interrupting the flow or the screening. Such filters are not to be used with high debris-loading or to cope with high levels of head-loss. Under a certain level of head-loss and depending on the machine size, it is impossible to lift and remove the device. They have lift trays to collect the debris as it falls off during lifting out.

As the water flows through the screening disk, marine species are arrested by the fish-friendly NOCLING™ panel. Fish are then kept in deep radial compartments located in front of the NOCLING™ panel. Within one minute, they are channeled by a fish-friendly pump into a returning flume. From here they are redirected by a pipeline around the water screen and into the outlet water. The fish are never exposed to the high or negative pressures and temperatures of the power plant, nor do they ever leave the water, so they are never exposed to air.