Static Sieves

Static sieves use large mesh grates or ridges spaced so they remove predetermined impurities from raw materials. They are typically used for high-throughput, non-food applications (like removing sawdust from lumber) where the material would be too impractical or rough for other methods.

Scalping sieves are typically smaller, enclosed static sieves which are placed in-line in processing systems to remove large granules from powders. These are commonly used to get large particles out of food, beer, and pharmaceutical inputs.

Dewatering sieves are typically open designs used to remove large particles from liquid streams. These are commonly used to remove sand, rocks, or slag from water or liquid products.

Benefits

Static sieves have a number of benefits, all stemming from their non-moving, mechanical nature:

• Energy Efficiency: Static sieves are obviously efficient to operate with no moving parts. With the right configuration, static sieves can capture relatively small undesirables..
• Easy Maintenance: Static sieves are simple and easy to maintain, with straightforward cleaning procedures that can be performed quickly and easily.
• Durability: With no force being applied to the product, a static sieve will last much longer than a vibratory or centrifugal sifter. They can be ordered in different grades of steel designed to last—sometimes—for the entire life of the application.
• Cost-Effective: As simple, static pieces of equipment with no motors and few wear parts, static sieves are low cost to purchase and maintain.
• Safe: Static sieves are very low risk to use, with no moving parts that could cause injury.

Drawbacks

• Operational efficiency: With no force being applied to the material (not even the full gravitational force) not as much liquid or overs will be removed from your product.
• Versatility: The applications where a static sieve can be part of a two-step process are limited to pre-milled products that are not too fine to begin with.