Polyurethane screens have been introduced in the industry for two main reasons:
- their excellent abrasion resistance, that gives more lifespan in working-process compared with wire screens and perforated metal;
- their particular suitability to sieve those aggregates easy to clog the holes, thanks to the material’s elasticity and the conical holes. Therefore, SOVALIT screens allow a reduction of costs compared with wire screens and perforated metal, even if these are much cheaper, thanks to their longer lifespan in working-process and to the reduction of dead times for the replacement.
Besides the usual requirements of a screening surface, SOVALIT polyurethane screens have the following characteristics:
- long wear resistance
- high cut resistance
- high elasticity and deflection resistance
- nearly complete absence of clogging
- significant noise reduction
- heat resistance up to 75°C
- good open area
- availability of different qualities and hardness of polyurethane.
SOVALIT screens can be divided into the following types:
- tensioned, with steel tensioning folds
- self-supporting, for flat vibrating sieves and trommels
- modular
- flip-flow
- dewatering
The same polyurethane of the screens is used by SOVATEC to produce polyurethane linings
