SS304 Vertical Powder Mixer for Food Industry, Doebritz Powder Blender, 300L Capacity / CIP Design

Product Summary

Doebritz presents the SS304 Vertical Powder Mixer for Food Industry – a high-purity blending solution engineered for homogeneous mixing of dry powders, granules, and flake materials. With a usable capacity of 300 liters per batch and a standard IP56 washdown rating, this vertical mixer is built for 24/7 food production environments. The unit supports ATEX Zone 22 dust explosion protection as an option, ensuring safe operation when mixing sugar, starch, spices, or dairy powders. The zero cross-contamination design features polished welds and crevice-free construction, meeting strict GMP and FDA guidelines.

Why Source Doebritz Vertical Mixers

Doebritz combines German engineering heritage with lean manufacturing to deliver industrial mixing equipment that reduces lifecycle costs while maximizing batch uniformity. Procurement managers and plant engineers choose Doebritz for:

• Superior Blending Uniformity: Our proprietary staggered spiral ribbon design achieves a CV <5% in under 8 minutes for most powder blends.
• Minimal Contamination Risk: Fully crevice-free interior, Ra ≤ 0.4μm electropolished finish, and hygienic clamp-type shaft seals prevent bacterial growth.
• ATEX Certified Option: Zone 22 (dust) and Zone 2 (gas) compliance with antistatic ribbon assembly and grounding kit.
• Global OEM Supply Chain: Doebritz provides drawing approval, 3.1 material certificates, and NDT reports for every pressure-retaining component.
• CNC Precision Machining: All drive shaft journals, bearing housings, and ribbon supports are CNC-turned within 0.02mm tolerance, ensuring vibration-free operation even at full load.

Housing & Rotor Engineering

The mixer’s housing is fabricated from single-grade SS304 (1.4301) sheets with full-penetration TIG welds, ground and polished to a sanitary finish. The double-helix ribbon rotor features a continuous spiral design that moves material both radially and axially. Outer ribbons transport product toward the center while inner ribbons push toward the ends, creating a powerful convective mixing action. All ribbon blades are laser-cut from 6mm SS304, then mandrel-formed and stress-relieved. The shaft is supported by lifelubricated, food-grade grease-compatible sealed ball bearings located in outboard pillow blocks – completely isolated from the mixing zone. A double mechanical seal with nitrogen purge port is available for ultra-fine powders < 50 microns.

Technical Specifications

Standard parameters below. Doebritz offers full customization of inlet/outlet flange sizes, drive configurations, finishes, and control panels. Lead time for non-standard units: 12–14 weeks. Expedite service available.

Specification	Detail
Working Capacity	300 L (standard), up to 2,000 L optional
Total Volume	450 L
Body Material	SS304 (1.4301), mirror-polished interior Ra ≤0.4μm
Rotor Design	Double-helix continuous ribbon, SS304, 6mm thickness
Drive Power	5.5 kW – 15 kW IE3 motor (ATEX optional)
Speed (RPM)	35–55 rpm (fixed or VFD-controlled)
Inlet / Outlet	DN250 round sanitary clamp / DN250 pneumatic slide gate
Seal Type	Hygienic double lip seal standard (mechanical seal optional)
Finish	Bead blasted exterior / 320 grit electropolished interior
CIP Compatibility	Yes, with sprayball and drain port

Heavy-Duty Application Scenarios

Food & Confectionery Powder Blending

Mix flour, cocoa, milk powder, and leavening agents for cake premixes. Gentle mixing action preserves particle size distribution of sensitive ingredients like freeze-dried fruit powders.

Nutraceutical & Supplement Manufacturing

Blend vitamins, minerals, amino acids, and excipients before tablet compression or capsule filling. Doebritz mixers are supplied with validation documentation packages (IQ/OQ) for regulated industries.

Spice & Seasoning Custom Blends

Uniformly combine ground spices, salt, sugar, and anti-caking agents with no heat buildup. The vertical design allows complete discharge via gravity through a pneumatic slide gate valve, minimizing residual material (< 0.5%).

Pneumatic Conveying System Integration

Install the Doebritz vertical mixer as a batch surge hopper upstream of a dilute-phase or dense-phase pneumatic conveyor. The reinforced top lid accepts a rotary airlock or flexible screw feeder inlet.

Frequently Asked Questions

Q1: What is the typical lead time for a Doebritz SS304 vertical powder mixer?

A: Standard units (300L, 500L, 800L) ship within 6–8 weeks after order confirmation. Custom configurations with special flanges, ATEX certification, or FDA elastomers require 12–14 weeks. We offer paid expediting to 4–6 weeks.

Q2: Do you support non-standard inlet/outlet flange drilling and custom vessel dimensions?

A: Yes. Doebritz accepts fully custom flange patterns (ANSI, DIN, JIS, or customer-specific) and non-standard height or diameter modifications. Provide a dimensional drawing or 3D model, and our engineers issue approval drawings within 5 working days.

Q3: Can the mixer be ATEX certified for explosive dust atmospheres?

A: Absolutely. The Doebritz SS304 vertical mixer is available with ATEX Zone 22 certification (internal and external) including earthing system, antistatic ribbon coating, restricted gap shaft seals, and EX-rated motor & junction box. Ask for our ATEX datasheet.

Q4: What temperature range and high-temperature options are available?

A: Standard elastomers (NBR) operate from -20°C to +80°C. For hot blending (e.g., dried milk powder up to 120°C), choose FKM or PTFE seals and a thermally decoupled bearing stand. For heating/cooling of vessel wall, we offer a dimpled jacket option for steam or chilled water.

Q5: How do I get a price or request a test blend with my powder?

A: Contact Doebritz directly via the inquiry form with your material name, bulk density, target batch size, and mixing time requirements. We provide free of charge testing at our US or EU tech centers, including a full mixing report with COA.