Powerscreen, a leading global provider of mobile crushing and screening equipment, has improved the Powerscreen X400S jaw crusher to increase machine throughput and overall capacity.

To achieve this, the upgraded machine now incorporates a fully independent high amplitude, hydraulically-driven pre-screen with an increased drop angle on the bottom deck.

Explaining the developments on the Powerscreen X400S, a company spokesman says: “The pre-screen removes a large percentage of the fines within the feed material before it enters the jaw chamber, resulting in increased output from the machine. The pre-screen works effectively in applications where the feed material is dirty. The aggressive nature of the pre-screen means that the dirty material can be screened out before entering the crushing chamber. The end result is a cleaner crushed product.”

In order to facilitate improved pre-screened material flow, the discharge opening from the under chute has been increased from 200 mm to 320 mm, allowing faster movement of pre-screened material to bypass the crushing chamber. To aid the removal of the pre-screened material, the stockpile capacity of new X400S Pre-Screen side conveyor is 41 cu m.

Other benefits of the X400S Pre-Screen model are quick set-up time, optional improved hopper capacity and a more efficient transfer of screened material to the improved design side conveyor. When compared with the standard non-pre-screen X400S, the side conveyor has increased in width from 600 mm to 650 mm and an improved discharge height of 2.8 m, creating increased tonnage transfer and stockpile capacity.

The XR400S Pre-Screen (with hydraulic release) will be on display at bauma, the international trade fair for construction machinery, building material machines, mining machines, construction vehicles and construction equipment exhibition, which will be held in Munich, Germany, in April 2013.

Based in Northern Ireland, Powerscreen is part of the Terex Materials Processing segment of Terex Corporation, a diversified global manufacturer of a broad range of equipment focusing on delivering reliable, customer-driven solutions for many applications, including the construction, infrastructure, quarrying, mining, shipping, transportation, refining, energy, utility and manufacturing industries.