qa451 doublescreen

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.

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Sandvik QA451 is a formidable solution with two inline 3 x 1.5 m (10 x 5 ft) screen boxes, which provide you with ultimate flexibility and control. The first screen performs as a fines extractor, whilst the second screen performs as a grader. Two processes combined on one plant, offering exceptional flexibility and massive throughput.

We have designed Sandvik QA451 to work in closed circuit with our tracked crushers, and you can optimize 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, two-speed tracking and hydraulically folding walkways are included as standard.

Other models within this range of screens include Sandvik QA335 and 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
  • My Fleet remote monitoring system to help optimize your machine operation.
Technical data
Screen box 6 x 1.5 m (20 x 5 ft)
Capacity (up to) 600 mtph (661 stph)
Engine C4.4 98kW (132hp)
Transport length 18.37 m (60 ft 3 in.)
Transport width 3.20 m (10 ft 5 in.)
Transport height 3.55 m (11 ft 8 in.)
Weight 37,912 kg (83,582 lb)

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

Lower your operating cost and your carbon footprint

In our drive towards a more sustainable future and helping our customers to lower their operating costs, we have developed a hybrid drive option for our Q-Range of screens and scalpers. This electric plug-in solution allows you to choose between operating in electric-hydraulic or diesel-hydraulic mode, giving you the flexibility to select the energy source which best suits your requirements. This will enable you to lower your operating cost as well as your carbon footprint.

Available on Sandvik QA441 and QA451 models within our screening range and QE342 and QE442 in our scalper offering.