Stainless Steel Fine Chemical Vertical Paddle Mixer, Doebritz Vertical Blender, 5000L Capacity / ATEX Certified Explosion-Proof
Doebritz supplies high-grade SS304/316L vertical paddle mixers for fine chemicals. ATEX certified, minimal air leakage, and high shear uniformity. OEM and bulk order available.
Product Summary
Doebritz presents the Stainless Steel Fine Chemical Vertical Paddle Mixer – a heavy-duty industrial blending solution engineered for high-purity powders, granules, and friable flakes. Capacities ranging from 500L to 20,000L. Available with ATEX Zone 1/21 explosion-proof drive systems and sanitary electropolished finishes for GMP-grade chemical processes. Achieve CV < 5% mixing uniformity with minimal product degradation.
Why Source Doebritz Stainless Steel Fine Chemical Vertical Paddle Mixer
- CNC Precision Machining: All paddle arms and hubs are CNC-machined from solid SS316L billet, ensuring zero welding distortion and perfect radial runout.
- Ultra-Low Air Leakage: Gap-optimized paddle tips and specially designed shaft sealing system reduce air ingress to less than 0.5 m³/h under differential pressure.
- ATEX Certified Explosion-Proof: Full certification for dust and gas explosive atmospheres (II 1/2 D c T5, II 2/2 G c T4).
- Global OEM Supply Ready: Compatible with upstream feeding systems, loss-in-weight feeders, and downstream pneumatic conveying lines.
- True Sanitary Design: No dead zones, crevice-free internal welds, and quick-release clamps for CIP/SIP cleaning protocols.
Housing & Rotor Engineering
The Doebritz vertical paddle mixer features a fully-welded, jacketed or non-jacketed cylindrical housing manufactured from hot-rolled SS304/316L plate. Internally, the multi-tiered helical paddle rotor combines counter-current flow patterns: outer paddles lift material upward while inner paddles force material downward, creating a three-dimensional turbulent mixing zone. Paddle tips are hard-faced with Stellite alloy for abrasive fine chemical ingredients. The outboard bearing assembly completely isolates the product zone from lubricants, meeting FDA 21 CFR requirements.
Technical Specifications
Below are standard engineering parameters for the Doebritz vertical paddle mixer series. Non-standard sizes, high-temperature designs (up to 300°C), and customized flange drilling are available upon request.
| Specification | Detail |
|---|---|
| Body Material | SS304 / SS316L (electropolished optional) |
| Working Capacity | 500L, 1000L, 2000L, 5000L, 10000L, 20000L |
| Rotor Design | Helical multi-tier paddle, hard-faced tips |
| Drive Power | 5.5 kW – 90 kW, IE3 motor |
| Explosion Protection | ATEX Zone 1/21 (II 2/2 G c T4, II 1/2 D c T5) |
| Max Temperature | -20°C to +220°C (standard); up to 300°C (optional) |
| Surface Finish | Ra ≤ 0.8 μm (product contact) |
| Sealing Type | PTFE lip seal / Single mechanical / Double mechanical |
Heavy-Duty Application Scenarios
Fine Chemical & Additive Blending
Ideal for antioxidants, PVC stabilizers, catalyst powders, and pigment concentrates. Gentle mixing action prevents shear-induced degradation of heat-sensitive compounds.
Pneumatic Conveying Integration
Direct flange connection to dilute-phase or dense-phase pneumatic feeding systems. The vertical configuration allows gravity discharge into downstream hoppers, big bag fillers, or tablet press feeders.
Silo Discharging & Homogenization
Installed beneath storage silos to re-blend segregated materials before batch processing. Achieves lot-to-lot consistency for continuous chemical manufacturing lines.
Frequently Asked Questions
- Q1: What is the typical lead time for a Doebritz vertical paddle mixer?
- A: Standard sizes (500L – 5000L) are 6–8 weeks. Custom engineered units with ATEX or high-temperature seals require 10–12 weeks. Expedited options available for OEM partners.
- Q2: Do you support non-standard flange drilling or custom inlet/outlet positions?
- A: Yes. Doebritz provides full customization: any flange standard (DIN, ANSI, JIS), rotated discharge chutes, side manways, and multiple spray nozzles for liquid addition. Minimum order customization fee applies.
- Q3: Is ATEX certification included as standard?
- A: Standard models are not ATEX certified. An ATEX-certified configuration (including motor, seal monitoring, and grounding) must be specified. We supply all required declarations and certificates (ATEX, UKEX, IECEx).
- Q4: What sealing options exist for high-temperature or solvent-based chemicals?
- A: Choose from three seal tiers: (1) standard PTFE lip seals (≤120°C), (2) single mechanical seals with quench (≤220°C), or (3) double mechanical seals with pressurized barrier fluid (≤300°C, zero leakage).
- Q5: How is the mixer cleaned for product changeovers?
- A: Smooth internal contours, removable spray balls, and quick-release paddles allow WIP (wash-in-place). For full CIP, we offer a flush-mounted outlet valve and automated CIP supply ports.
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