The What, Why and Where of Wedge Wire

An Explanation of its Origins and Industrial Uses


With the discovery of new and amazing processes we sometimes lose sight of the older established materials and our dependence on the simple brilliance coupling an old product with necessary modern legislation.  With the continuing crack down on environmental spoilage the industrial reliance on a time proven efficient filtration method becomes more important every day.

What is wedge wire?

It is exactly what it say’s a wire,or rod that is wedge shaped.The major benefit of these wedge shaped pieces is that if you fix them to a frame running across the shaped pieces and attach it to the underside of the rods you end up with a narrow slit at the top and underneath a wide wedge shaped space to enable rapid dispersal of the liquid carrying a product being filtered.

What is it used for?

This method is exactly what is needed for screening,the commercial word for filtering, slurries.It can set the size of solid removed with pin point accuracy,and if necessary a stack of screens with the necessary transfer ways could remove a number of sizes.  For example if you made the top with a three millimeter gap above a screen with a two mm gap and with a lower deck of one millimeter you could direct the removed particles into collection points or hoppers of each size. Because of the much wider gap beneath the surface compared to above means the carrying liquid of the product to be removed can drain away extremely quickly.

Which industries use it?

Think wood pulp, sand in suspension, sewage plants etc.Any product which has a larger quantity of liquids than solids. The Food industry uses high pressure water jets to reclaim flesh from carcasses and the resultant slurry would be directed across a screen,the term for several wedge wire’s attached to a frame, to have the solids removed from the reclaimed stream produced by the water jetting action. The main advantage in using wedge wire is you can produce a small numbers of screens,in theory just one, with a non standard gap, say 1.856 mm so a precision welder can produce a module immediately. If you were using woven mesh there would be a minimum run to make it economically possible.

As shown it is a cost effective way of producing a filtering method with the most efficient removal of liquid from solid.  It can be manufactured from a range of metals as well as polymers to satisfy any particular chemical reactions which could occur.

Because of the rigidity of the screening frames and the inherent level platform they produce, cleaning of wedge wire is as simple as could be. A wipe over the top face and a quick brush across the rear will quickly remove any retained product.

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