QA450 – (S7)

QA450 (S-7)  has a massive throughput, true mobility, and a class leading screening area, results in the ultimate profit generator available today.

Although possessing many customer focused features, at the heart of the QA450 (S-7) is the Triple Deck Doublescreen Box. This enables the screener to incorporate such mold breaking features as:

• Independent screen-box slope
• Independent screen-box vibration
• Independent screen-box amplitude
• Independent screen-box speed.

All resulting in fantastic output of accurate, quality products!

The Doublescreen box allows for over twenty different screening angles. Screening efficiency is maximized as material flow is directed by the angle of the screen box resulting in:

 1. A steep angle for the primary screen-box ensures that the majority of the material is processed in the initial impact area.

2. The majority of the undersize is removed during initial impact.

3. Only near-size material passes to the secondary screen-box. This may be set flat enough to ensure any remaining material is screened efficiently.

4. Clean gradings, at very high out put, are produced as material is exposed to large screening area.

The primary box consists of three 10 x 5 decks, with the secondary box consisting of three decks, with the top and middle being 10 x 5, and with the bottom being a 8 x 5 .  This provides the customer with a 20 x 5 top deck, 20 x 5 middle decks and an 18 x 5 bottom deck.

 
Key Features and Benefits to the QA450 (S-7):

The QA450 (S-7) is based around the revolutionary Doublescreen concept that has taken the screening world by storm. Designed for the aggregate producer who requires large throughput, true mobility and clean gradings, the new QA450 (S-7) possesses such features as:

• Screening area consists of two individual 10×5 screen boxes incorporating 3 decks in each screen box, allowing for a more concentrated screen
• Each screening unit of the doublescreen system has uniquely high inertia ensuring that superb separation is carried out over the full surface of the screen decks
• The screen box arrangement presents a massive screening area, yet allows for an incredibly clean product through the independent set up of the two screen boxes
• Direct drive vibrating grid and screen boxes give enhanced efficiency with minimum maintenance – no V-Belts
• Rapid ratcheting tensioners give fast mesh changes
• Patented screen box lift mechanism to ease mesh change
• Longer chevron belted side conveyors, in order to feed directly into a cone crusher, and/or possess vast stockpiling capacities
• Longest tail conveyor in its class for even greater stock piling capacity
• Faster running belts in order to facilitate high rates of production
• New stronger chassis design for the most demanding of environments
• Longer tracks in order to produce a stable screening platform
• Large hopper, with variable speed belt feeder, heavy-duty roller bed and heavy-duty belting
• Heavy duty tipping grid activated by remote control
• Unique design spreader plate to spread material across the full width of the screening facility whilst maintaining the velocity of the material particles
• Hydraulic walkways deploy in seconds, giving low access height and safe working area for maintenance and mesh change. 

Also available with optional:

• Remote Control
• Shredder Box
• Vibrating Grid
• Patented Transport Bogey

With all the above features the QA450 (S-7) promises to be the most definitive mobile screening system for the truly serious contractor or quarry operation. The QA450 (S-7) represents the greatest innovation in mobile screening systems as it finally resolves the conflicting principles previously associated with providing an immense screening area on truly mobile plant, making the QA450 (S-7) the most productive mobile screen in its class.