Nauta Mixer, Doebritz Industrial Mixer, 15000L Capacity / ATEX Certified
Doebritz Nauta Mixer for precise blending of powders & granules. 15000L capacity, ATEX certified, low maintenance. OEM supplier with global shipping. Get quote.
Product Summary
Doebritz Nauta Mixer is a high-efficiency conical screw mixer engineered for gentle yet rapid homogenization of dry powders, granules, and pastes. With working capacities from 20L to 15,000L, this batch mixer delivers a mixing uniformity of 98% within short cycle times. **ATEX certified** for explosive dust environments (Zone 21/22). Ideal for food, chemical, and mineral processing industries requiring contamination-free blending and complete discharge.
Why Source Doebritz Nauta Mixer
- Precision Machined Screw & Arm: CNC-machined mixing screw ensures <0.5mm radial runout for silent operation and extended seal life.
- Low Maintenance Design: No bottom bearing in product zone eliminates product contamination and reduces wear parts by 60%.
- ATEX Compliant: Full ATEX II 2D c T120°C certification for safe operation with combustible dusts.
- Global OEM Supply: Customizable inlet/outlet flanges (DIN/ANSI/JIS), material finish (304/316L), and drive configurations for turnkey system integrators.
Housing & Mixing Screw Engineering
The Doebritz Nauta Mixer features a conical stainless steel (304/316L) housing with mirror-polished internal surface (Ra ≤0.4μm) for rapid cleaning and no material retention. The orbital arm rotates slowly (1-2 RPM) while the inner mixing screw spins at up to 150 RPM, creating a 3D convective flow pattern that moves material from bottom to top and wall to center. The top-drive gearbox with outboard bearings isolates lubrication from product zone. All welds are ground and ferrite-controlled for sanitary applications.
Technical Specifications
Below specifications represent standard models. Doebritz offers full custom engineering for pressure, temperature, and abrasion resistance. Contact our technical sales for tailored data sheets.
| Specification | Standard Model (NMC-5000) |
|---|---|
| Total Capacity | 5,500 L (effective 5,000 L) |
| Body Material | 304 Stainless Steel (316L optional) |
| Mixing Screw Speed | 50 – 150 RPM (variable via inverter) |
| Orbital Arm Speed | 1.2 RPM (fixed gear ratio) |
| Drive Motor Power | 22 kW / 30 HP (380-690V, 50/60Hz) |
| Uniformity (CV) | <5% after 8-12 minutes |
| Max Temperature | 80°C (PTFE seals) / 250°C (graphite option) |
| ATEX Certification | II 2D c T120°C (Zone 21/22) |
Heavy-Duty Application Scenarios
Chemical & Mineral Blending
Dyes, pigments, fertilizers, plastic compounds. The gentle screw mixing prevents degradation of fragile particles or agglomerate breakage while achieving complete homogeneity.
Food & Feed Processing
Flour, spices, premixes, animal feed additives. 316L surface finish and quick-opening CIP spray balls option enable rapid product changeovers in sanitary lines.
Pharmaceutical & Fine Chemical
APIs, excipients, vitamin blends. Customizable vacuum drying capability (heated screw option) allows mixing and drying in a single vessel – reduces processing time by up to 40%.
Frequently Asked Questions
- Q1: What is the typical lead time for a Doebritz Nauta Mixer?
- A: Standard models (500–5000L) ship within 10–12 weeks. Customized units with special alloy materials or ATEX IIC certification require 14–16 weeks. Expedited service available for qualified OEM partners.
- Q2: Can you customize inlet/outlet connections and drives?
- A: Yes – Doebritz provides full non-standard flange drilling (DIN, ANSI 150/300, JIS) and motor options including IEC, NEMA, or explosion-proof motors. We also supply inverters and load cells for batching systems.
- Q3: Is the mixer ATEX certified for Zone 20 dust?
- A: Our standard ATEX certification is for Zone 21/22 (II 2D). For Zone 20 (continuous dust cloud), we offer a pressurized housing design with ISO 80079-36 certification. Please specify zone requirement when requesting a quote.
- Q4: What is the maximum operating temperature?
- A: With standard PTFE seals, max working temperature is 80°C. For high-temperature processes (up to 250°C), we supply graphite packing and an external cooling jacket on the top shaft bearing housing.
- Q5: Do you offer a trial or rental program?
- A: Yes – Doebritz operates a lab-scale (20L & 100L) test center in our German headquarters. Customers can send material for mixing validation. Rental units are available for short-term production needs in EU regions.
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