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Screen Media: Polydex® Section Header
& Rubberdex®
Polydeck Screen Corporation
Polydex® represents our line of modular polyurethane screen media. Polyurethane offers the most options, not only in terms of screen openings, but also in the integration of performance enhancing features like dams, restricted flow bars, skid bars, and deflectors. These features are not glued on but actually molded into, and a part of the panel itself (see pages 8 & 9). Poly panels are typically the best choice for wet or wash applications. Polyurethane material variations include:
STD - Our most common polyurethane compound, it’s the right choice for most general applications.
85 durometer, Shore A. Effective between -5º F. (-20º C.) and 150º F. (66º C.).
LD - A softer poly compound for applications that require the screen panel surface to be flexible in order to prevent blinding caused by sticky materials.
65 durometer, Shore A.
FL - A special formulation for applications where microbial action degrades the standard polyurethane structure.
Extreme FL - For applications with persistent microbial or hydrolytic breakdown of poly even after using the FL poly formulation, this material offers a more potent punch.
Rubberdex® represents our line of modular rubber screen media. Rubber performs best in dry applications, and typically offers the longest wear life of any screen media material in the most difficult, aggressive scalping applications. Rubber panels are also effective in reducing noise levels by up to 9 decibels when compared to steel media, about a 50% reduction as recorded by the human ear.
PD65 - Our standard rubber compound that is best for high-wear or heavy feed rate applications like scalping.
Effective between -60º F. (-51º C.) and 150º F. (66º C.).
PD40 - Softer “Flexi” rubber that’s proven extremely effective in solving the toughest blinding problems.
Effective between -40º F. (-40º C.) and 150º F. (70º C.).
Flexi Rubber
PD60 - A “middle of the road” blend for applications where a softer material is needed to discourage blinding, but where loading may be too heavy for our PD40 Flexi rubber.
PD60HT - Used in situations like slag where screen panels are exposed to high temperatures.
Effective up to 203º F. (95º C.).
FRDX60 (Ferrodex™) - Special formulation that extends the wear life in certain coarse, wet screening applications. Notable by the red coloration of the rubber panels.
What is “Durometer?”
Durometer is a measure of surface resistivity or the resistance of plastics toward indentation. Polydeck uses the Shore A scale in selecting plastic and rubber compounds for its screen panels. The higher the number, the harder the material.
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