ROTEX® Screeners

ROTEX® Screeners are self-contained production screening machines for separating dry materials according to particle size. Combining a unique gyratory-reciprocating motion of the near-horizontal screen surface with a positive screen mesh cleaning system, ROTEX® Screeners provide unusually high efficiency and capacity. Numerous innovative design features deliver unparalleled performance, ease of operation, and durability.
ROTEX® Screeners are continually developed for hundreds of applications serving a broad range of industries and can be installed in thousands of locations worldwide. Screener models range from one to five screen surfaces for separations with openings from ½” to 325 mesh.

How it Works

  

Gyratory Motion Rapidly Distributes, Stratifies, and Separates

The unique gyratory motion imparts a combination of actions to the material as it passes along the screen surface. It begins with a horizontal circular motion at the feed end and gradually diminishes along the length of the machine to an elliptical path. Finally, the motion ends in an approximate straight-line motion at the discharge end. In order to keep the material in constant contact with the screen surface, there is no vertical component to this motion.

  1. Circular Motion at Feed End The gyratory motion at the feed end of the machine immediately spreads the material across the full width of the screen surface to maximize screen utilization. At the same time, the motion stratifies the material, causing the fines to sink down against the screen surface. Particles appreciably smaller than the openings quickly pass through at this part of the screen.
  2. Changing to Elliptical Motion at Center As the circular motion diminishes into an elliptical path, the gentle near-horizontal motion causes the fine particles closer in size to the screen mesh to fall through the mesh openings. These particles are known as near-size particles.
  3. Straight Line Motion at Discharge End The nearly linear reciprocating motion at the discharge end of the ROTEX Screener removes those particles closest in size to the mesh openings while gently conveying the oversize material off the screen. The ROTEX’s unique ability to advance or retard material flow at the discharge end allows for further fine tuning in order to achieve the most efficient and accurate motion for the application.
 

Installation Options

Floor Mounting

Because the ROTEX® counterbalanced drive has low transmitted forces, the ROTEX Screener can be floor mounted in properly designed structures, a design feature unique to this type of equipment. The ROTEX® Screener can be mounted directly on the floor or on an elevated structural steel framework, which allows for drums and other equipment to be located under the machine. ROTEX® application engineers are available to recommend a stand for any specific application.

Cable Suspension

ROTEX® Screeners can be cable-suspended from the four corners of the machine, thereby isolating out-of-balance screening forces from the surrounding structure. Accurate counterbalancing of the ROTEX® Screener makes this type of installation option possible. If the existing overhead structure is not suitable or structurally unable to support the cable-suspended unit, the ROTEX® Screener can be suspended from a floor-mounted cable support stand. As with conventional cable suspension, this option effectively isolates the horizontal out-of-balance screening forces, which minimizes costs for new structures and permits the use of older structures that might not otherwise support cable-suspended equipment.

Product Specifications

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Positive Screen Cleaning
Description: 
The bouncing action keeps screen openings clear, maintaining efficiency and capacity.
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Automatic Tensioning
Description: 
Unique screen attachment method eliminates need for tools and adjustment.
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Dynamic Absorber Drives
Description: 
ROTEX drives are designed for long term, trouble-free service with minimal maintenance required.
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Inlet/Outlet Connections
Description: 
The sliding inlet virtually eliminates the regular replacement of your flexible connecting sleeves, and will not crack or split because the sleeve is stationary.
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Compensating Clamps
Description: 
Patented spring actuated clamps take the guesswork out of cover clamping.