Polystep is one of the older modular screening systems on the market. One main benefit of the Polystep modular system is its unitised design. The system uses primarily one standard module size, resulting in simplified installation and maintenance.
The Polystep modular system creates stepped sections along the length of the screen. As a result, the steps cause the material to tumble as it moves across the deck. This tumbling action therefore improves screen efficiency.
Polystep modules are nominally described as 600mm long. The actual module length is 630mm and 300mm wide.
In addition, the system is available in two module heights. The polyurethane version being 62mm high and the heavier duty rubber version, 72mm high. Therefore, the liner material can be selected to suit the application and operating conditions.
The Polystep modules are held in place by being knocked down onto a beaded metal profile, which is fastened across the width of the screen at one end of the module. Following this, the other end of the module is held in place by the previous one which overlaps it. The first row of modules on the screen fits into a starter channel as there is no previous row of modules to clamp it down.
The Polystep system typically uses side liners that are 120mm or 185mm high, which are held in place with two fixings. These can be produced from steel backed rubber or polyurethane. Therefore, the liner material can be selected to suit the application and operating conditions.
