A Pre-Cleaner or Primary Cleaner is the first stage in a multiple belt cleaner system. Its purpose is to remove the majority (±80%) of carryback material adhering to the belt, leaving only a thin layer of residual fines.
A Pre-Cleaner is typically installed on the face of the head pulley, just below the material trajectory, and installed so that it is out of the material stream. All models of MARTIN® Pre-Cleaners, unlike others, are constructed so as to avoid material build-up during operation and thereby improve efficiency and service life.
Pre-CLeaners are generally tensioned at low pressure (≈ 2 psi) against the belt. This low blade-to-belt pressure allows the Pre-Cleaner to be positioned at a peeling angle against the belt. The use of higher pressure at this angle would endanger the belt, splice, or the Cleaner itself.
As you would expect, because of the significantly different characteristics of materials that are conveyed, and the type, speed and design of belt conveyors, MARTIN® offers a broad range of blade shapes, sizes, and blade-materials; frame configuration; and types of tensioners to provide the most effective solution in removing any type of carryback while protecting the belt and its splices.