Dewatering Screen Features
A New Solution To Dewatering

Rigid Single-Member Deck
Feed Box
Dual Vibrating Motors
Urethane Deck
Urethane Side Screen
+/- 5-Degree Bed Angle Tilt

RIGID SINGLE-MEMBER DECK
The GreyStone deck is a single-member weldment,utilizing heavy pipe cross members for a base that supports reinforced steel U-channels. These rigid U-channels provide for easy access and application when replacing individual sections of urethane screen.

FEED BOX
The feed box is mounted prior to the urethane deck to absorb the initial impact while distributing the feed. It is fabricated from A36 ½-inch steel and can be lined as requested. The feed box is also customized to any size and shape required. Two strips of angle iron run across the length of the bottom to hold material and create a natural wear surface.

DUAL VIBRATING MOTORS
Two single-mechanism vibrators create a linear motion for removing excess water from material. The single mechanism requires minimal maintenance and allows for easy application. Each vibrator can be easily set to increase its centrifugal force, resulting in higher production and a drier product—providing the user with the ability to adapt the material for production.

URETHANE DECK
GreyStone’s Dewatering Screens have urethane decks, which resist wear and provide long life. They contain water dividers that divert material over the region where water passes through the screen, while ¼-mm openings allow water to pass freely through—holding back material on the top side of the deck. When dewatering finer material, the lower layer of sand acts as a secondary filter that retains 99 percent of the material with the product, while only one percent goes to waste. On average, a concrete or masonry sand product achieves a final water-to-material ratio of 1:10.

URETHANE SIDE SCREEN
GreyStone’s urethane side screen liners are replicas of our deck screens, without the dividers. These liners contain the same ¼-mm aperture for water removal, but are fastened to the inside of the screen. They have open channels on the inside-bottom that freely allow water to escape to the under-flume, causing the initial pool of water on the feed side to flow around the material without having to travel through it like most other screens. As water flows around the sand bed and side liners, the water that enters with the product has a clearer path through the individual particles and separates more quickly. A large portion of water is removed before having to travel through the bed depth, and a higher percentage of dry product is obtained at a greater production rate.

+/- 5-DEGREE BED ANGLE TILT
The bed can tilt from a 5-degree-uphill to 5-degree-downhill slope. Depending on the material volume, gradation and water retention, the user can send the product downhill for higher production or uphill to create a deeper bed depth—forcing more water to the under-flume. In a matter of minutes, the bed angle can be changed and locked into place, ready for production. Having the ability to change the bed angle gives the operator more control for adaptation to feed and gradation changes.