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Sandvik QA451

Formerly known as: Extec S-7, QA450

Sandvik QA451

Sandvik QA451 Doublescreen

The 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.

The 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.

Sandvik have designed the 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.

Features and Benefits:

World Class Doublescreen technology, offering greater adjustability, increased accuracy and higher screening efficiency

Both screens independently adjustable for greater screening accuracy

Large volume hopper complete with remote control hydraulic tipping grid

Oversize conveyor which features both hydraulic raise / lower and hydraulic slew functions

User-friendly PLC control system with sequential start-stop for speed and ease of operation

Full radio remote control and two speed tracking for safe and efficient movement

Designed for optimum fuel economy to lower your operating costs

Hybrid “e” drive option with electric plug-in lets you choose your most economical and efficient energy source


Other models within the QA Mobile Doublescreen range include the QA335 and QA441.

  • Manufacturer: Sandvik
  • Equipment: 20' x 5' / 6 x 1.5 m Triple Deck Doublescreen
  • Engine: C4.4 98kW (132hp)
  • Transport Length: 18.37 m / 60' 3"
  • Transport Width: 3.20 m / 10' 6"
  • Transport Height: 3.55 m / 11' 8"
  • Weight: 34,000 kg / 74,957 lbs

Technical Specifications

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