DP® UNIVA Pin Disc Mill

Universal Mills (Pin, Disc, etc.)

DP® UNIVA Pin Disc Mill

The DP® Pin Mill is a high-speed impact mill featuring intermeshing pin discs for efficient, uniform size reduction. Designed for medium to fine grinding of crystalline, brittle, and low-oil materials, it ensures reliable performance, consistent particle size control, and easy cleaning—making it ideal for food, chemical, and pharmaceutical applications.

Allowable Feed Size: 0 to 8 MM
Achievable Output Fineness: 40 Microns to 1000 Microns
Throughput Capacity: 50 kg/hr to 10000 kg/hr

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Working Principle

The DP® Pin Disc Mill operates on the principle of high-speed impact between two pin discs—one rotating and one stationary. Material enters through the feed inlet (1) and is directed into the grinding zone (2) by gravity or controlled feeding systems such as a screw or vibratory feeder. Air can be introduced via the air inlet (6) to aid material transport, cooling, and fluidization during milling.

Inside the grinding chamber, the housing side rotor (3) and the door side stator (4) are equipped with precisely arranged pins (5). As the rotor spins at high speed, particles are accelerated and collide repeatedly with the stationary pins, as well as with each other. These high-energy collisions result in rapid size reduction without the use of screens.

This configuration is ideal for crystalline, brittle, and low-oil content materials, producing consistent, uniform fineness. The final product, along with process air, exits via the fine product & air outlet (7) for collection or pneumatic conveying. Particle size can be adjusted by varying rotor speed, pin configuration, and feed rate to meet specific application requirements.

Features & Benefits

Achieves particle sizes down to 35 µm for precision applications
Available in laboratory and production models to suit R&D or high-capacity needs
Capable of processing materials up to Mohs hardness 4 or less
Variable speed rotor drive for precise control of fineness and throughput
Operates efficiently with low energy consumption and reduced operating costs
Delivers uninterrupted grinding with a screen-fre design, ensuring consistent output and minimal downtime
Grinding chamber and components designed for easy access and quick cleaning

Machine sizes

Options & Accessories

Explosion Protection: Can be engineered with pressure shock-resistant housing to comply with dust explosion safety standards, supporting overpressure resistance up to 10 bar.
Metal Separation: Can be fitted with inline magnetic separators or metal detectors to maintain product purity and protect equipment.
Custom Rotor & Pin Configurations: Choice of rotor–stator or counter-rotating designs, with pin arrangement and density tailored to specific grinding applications.
Feeding & Discharge Systems: Compatible with screw feeders, vibratory feeders, gravity feed hoppers, pneumatic conveying and gravity discharge systems.
Instrumentation & Monitoring: Can be equipped with temperature probes, vibration sensors, and safety interlocks for process control and equipment protection.
Variable Speed Drive: Optional frequency-controlled drive system for precise adjustment of rotor speed and particle size.