Multi Mill Sieves

A Multi Mill Sieve (or Multimill Screen) is a precision-engineered, curved metal screen designed specifically for use inside pharmaceutical, chemical, and food processing multi-mill machines. It plays a critical role in size reduction, granulation, and wet/dry milling operations, acting as the physical barrier that controls the final particle size of processed materials.

Key Characteristics & Specifications

• Material Composition: Fabricated using high-grade Stainless Steel (SS 304 or SS 316/316L) to ensure corrosion resistance, chemical inertness, and compliance with strict sanitary standards.

• Construction & Design:

  • Formed into a curved or cylindrical shape to fit precisely inside the milling chamber.

  • Designed with reinforced edges, support bands, or mounting handles for quick installation and removal.

• Perforation Types:

  • Available in round holes, square holes, or slotted perforations.

  • Hole sizes generally range from 0.2 mm up to 25 mm (commonly 0.5 mm to 12 mm for general pharmaceutical granulation), allowing for fine pulverization or coarse separation.

• Compliance: Built to strict GMP (Good Manufacturing Practice) and FDA guidelines, ensuring lead-free, non-toxic, and autoclavable production environments.

Working Principle

When a multi-mill operates, materials inside the chamber are subjected to high-speed cutting, shearing, and impact forces by rotating beaters or blades.

• The centrifugal force pushes the material toward the periphery of the chamber.

• Only particles that have been reduced to a size smaller than the sieve's apertures can pass through tangentially and radially.

• Oversized particles remain inside the chamber, continuously undergoing the milling action until they reach the required size, ensuring a uniform particle size distribution.

Primary Applications

• Pharmaceuticals: Sizing wet and dry granules, milling active pharmaceutical ingredients (APIs), and processing excipients for tablets and capsules.

• Food & Beverages: Grinding spices, sugar, grains, and food additives.

• Chemicals & Cosmetics: Pulverizing pigments, resins, dyes, and cosmetic powders.

Core Advantages

• Uniform Particle Control: Guarantees consistent granule size distribution, which is vital for product quality and downstream manufacturing consistency.

• Hygienic & Easy to Clean: Smooth, electropolished surfaces prevent residue buildup and microbial adhesion, supporting quick batch changeovers.

• High Durability: Built to endure high-speed mechanical impacts and continuous industrial usage without warping.

Are you looking for a specific hole size, dimensions (such as standard 265mm diameter screens), or material grade (SS 304 vs SS 316) for a particular multi-mill model?