QA451 Mobile doublescreen

Sandvik QA451 Doublescreen in a recycling application

Sandvik QA451 is the world’s first triple deck Doublescreen which offers you unrivalled throughput and control. Through years of research, customer feedback, and Sandvik's extensive experience in the field, we developed this innovative machine which provides you with massive stockpiling capabilities.

Sandvik QA451 is a formidable solution with two inline 3 x 1.5 m (10 x 5 ft) screenboxes, a large feed hopper and extended conveyors. We have designed Sandvik QA451 to work in closed circuit with our tracked crushers, and you can optimise the feeding position to upstream units with the fourth hydraulic conveyor.

To provide ultimate flexibility Sandvik QA451 can also work as a stand-alone screening and stockpiling system. In this mode the unit can produce four sized products with fifth oversize material scalped off at the grid. Safety features like full radio remote-control and hydraulically folding walkways are included as standard.

Other models within this range of screens include Sandvik QA331 and Sandvik QA441.


  • High production capabilities due to its large screening area
  • Oversize conveyor which features both hydraulic raise / lower and hydraulic slew functions
  • User-friendly control panel with sequential start-up for ease of operation.
  • Hydraulically folding walkways for ease of maintenance and set up
  • Full radio remote control as standard for safe and easy setup
  • Designed for optimum fuel economy to lower your operating costs
  • Now fitted with My Fleet remote monitoring system to help optimize your machine operation.
Technical data
Screen box 6 x 1.5 m (20 x 5 ft)
Engine C4.4 74.5 kW (100 hp)
Transport length 18.37 m (60 ft 3 in.)
Transport width 3.20 m (10 ft 6 in.)
Transport height 3.55 m (11 ft 8 in.)
Weight 34,000 kg (74,957 lb)

Please note all weights and dimensions are for standard units only.
Former Names: Extec S-7, QA450 Doublescreen