Nutraceutical Cone Mill, Doebritz Industrial Comminution Mill, FDA-Compliant / Sanitary Design

Product Summary

The Doebritz Nutraceutical Cone Mill sets a new benchmark for sanitary particle size reduction in the dietary supplement and pharmaceutical supply chain. Engineered to achieve a throughput capacity of up to 1,500 kg/h (depending on screen gauge and rotor speed), this cone mill handles demanding powders, wet granules, dry granules, and friable tablets with exceptional efficiency. The unit features a fully sealed, crevice-free housing (316L stainless steel as standard) and is optionally ATEX certified for dust explosion safety (Zone 22 internal / Zone 21 external). Optimized for low heat generation, minimal dust exposure, and vibration-free operation, the Doebritz Cone Mill guarantees unmatched product uniformity while eliminating cross-contamination risks.

Why Source Doebritz Nutraceutical Cone Mills

• Superior Sanitary Compliance: All product-contact surfaces are polished to Ra ≤ 0.4µm with no dead zones, fully compliant with cGMP, FDA, and EC 1935/2004 regulations.
• Precision Engineered Rotor & Screen Gap: CNC-machined, cantilevered rotor design with adjustable clearance down to 0.2mm ensures repeatable particle size distribution (D90).
• Rapid Changeover & Cleanability: Patented tool-less screen clamp and rotor removal system reduces wash cycles by 60% – ideal for multi-product nutraceutical lines.
• Minimal Thermal Impact: Low-friction milling action combined with optional water-cooled shaft seal housing preserves heat-sensitive active ingredients (e.g., probiotics, botanical extracts).
• Global OEM-Ready Supply Chain: Fully traceable material certifications, 100% factory test-run with vibration analysis report, and support for third-party inspection (SGS, TÜV).

Housing & Rotor Engineering

The heart of the Doebritz Nutraceutical Cone Mill lies in its monolithic, one-piece solid bowl housing – manufactured from investment cast 316L stainless steel. Unlike fabricated assemblies, our casting eliminates weld seams and internal stress risers, preventing micro-cracks where bacteria could proliferate. Rotor blade geometry follows a proprietary compound-angle impeller design: a lower helical sweep for coarse de-agglomeration and an upper linear vane for final sizing against the conical perforated screen. The rotor is dynamically balanced to ISO 1940 G6.3, ensuring whisper-quiet operation below 78 dBA at full load. Integrated shaft sealing utilizes a triple-lip, FDA-grade PTFE cartridge seal with an optional air purge port for containment of potent compounds or sterile applications. All external surfaces are passivated and electropolished for corrosion resistance against alkaline cleaning agents.

Technical Specifications

All Doebritz Cone Mills undergo 100% dimensional inspection using CMM equipment and include a certified material test report (EN 10204 3.1). Custom configurations – including food-grade nitrile seals, heavy-duty inlet hoppers, and explosion-proof motors – are available for global heavy-duty process lines.

Specification	Detail
Body Material	316L Stainless Steel (investment cast, Ra ≤ 0.4µm)
Rotor Design	Proprietary helical/linear compound impeller (dynamic balanced)
Screen Type	Perforated conical (0.5 – 5.0 mm apertures) / optional wedge wire
Max Throughput	Up to 1,500 kg/h (depends on material density and screen size)
Drive Power	4.0 kW / 7.5 kW IE3 motor (ATEX and washdown-ready options)
Rotor Speed	150 – 1500 rpm (frequency inverter controlled)
Seal Type	FDA-grade PTFE triple-lip cartridge with optional air purge
Temperature Range	-20°C to +150°C (with HT option)
Certifications	CE, FDA, EC 1935/2004, optional ATEX II 2D

Heavy-Duty Application Scenarios

API & Excipient Sizing for Tableting

Pre-mill compacted ribbons or dry granules prior to final blend. The Doebritz unit‘s low shear action maintains crystalline integrity while achieving uniform flowability for rotary tablet presses. Optional 316L perforated screens from 0.5mm to 5.0mm aperture.

De-lumping of Food & Nutraceutical Powders

Break agglomerates in soy protein isolates, vitamin premixes, or electrolyte powders after fluid bed drying. The cone mill can be positioned directly below a pneumatic conveyor receiver, accepting up to 100% of surge load without bridging.

Reclaim & Recycling of Off-Spec Capsules/Tablets

Integrated with a screener, the Doebritz Cone Mill gently reduces rejected pressed tablets into a free-flowing powder for rework, with sieve analysis verification to ensure no oversized particles enter the next process.

Frequently Asked Questions

Q1: What is the standard lead time for a Doebritz Nutraceutical Cone Mill?

A: For standard 316L sanitary models with FDA seals, lead time is 4-6 weeks ARO (after receipt of order). Expedited 3-week delivery available for OEM partners. Custom ATEX or water-cooled versions require 8 weeks.

Q2: Can you supply the cone mill with an ATEX-certified motor and grounding kit?

A: Yes. Doebritz offers full ATEX II 2D Ex h IIIC T130°C Db certification for dusty explosive atmospheres, including anti-static screen and shaft grounding brush. All documentation and CE/UKCA declarations are included.

Q3: Do you provide non-standard flange dimensions (e.g., DIN, ANSI, or custom bolt patterns)?

A: Absolutely. While our standard inlet/outlet is tri-clamp (2-inch, 4-inch, 6-inch), Doebritz custom-machines any flange type – from ANSI 150# to DIN 2576 – based on your General Arrangement drawing. Minimum order quantity for custom flanges is one unit.

Q4: How does the cone mill handle high-temperature or sticky products (e.g., honey powders, lecithin)?

A: For products above 60°C or with tacky surfaces, specify the ‘HT‘ option: water-jacketed housing, polished rotor with PTFE-coated blade tips, and a heated screen retainer to prevent condensation. Maximum operating temperature is 150°C with optional seals.

Q5: What spare parts and after-sales support does Doebritz provide?

A: Doebritz maintains a global warehouse for screens, rotor seals, and bushings (3-5 day delivery to most industrial zones). We also provide remote commissioning via AR headset, on-site training, and a 24-month warranty on the housing and rotor against manufacturing defects.

Note: All data represent average values from factory acceptance tests. For precise sizing and validation, Doebritz offers free material testing in our certified process lab – send 5 kg of your product for a custom particle size report.