Doebritz Food Grade Quick-Release Rotary Airlock, Stainless Steel 316L / <20 ppm Leakage, ATEX Certified

Doebritz Gravity Quick-Release Rotary Valve

Full Industry Brochure

Brand: Doebritz

Product: Quick-Release Gravity Discharge Rotary Valve

Positioning: Efficient Discharge · Precise Airlocking · Quick-Release & Easy Cleaning · Multi-Scenario Adaptability

SKU: DBR-1237

Category: Powder Rotary Valve

Tags: Airlock, ATEX Certified, Bulk Material Handling, CIP, Rotary Valve, Airlock Feeder, Doebritz, Food-Grade, Pneumatic Conveying, Quick-Release Rotary Valve, Stainless Steel, SUS304, SUS316L, Scratch Detection, Explosion-Proof

 1. Product Overview

The Doebritz quick-release rotary valve integrates a quick-release structure, precise airlocking, sanitary design, wear/explosion resistance, and variable-frequency metering into a high-performance powder/granule discharge and airlock device. It is widely used in food, pharmaceutical, chemical, new energy, new materials and other industries, adapting to positive/negative pressure pneumatic conveying, gravity feeding, batch metering and other diverse working conditions, balancing efficient production and compliance safety.

2. Core Product Names

• English: Quick-release rotary valve, Quickrelease airlock valve, Star discharge valve, Airlock feeder

3. Core Advantages

1.Ultra-Fast Disassembly, Easy Cleaning Without Dead Spots No special tools required for quick disassembly and assembly. Supports manual cleaning and online CIP/WIP cleaning. Residue-free, prevents cross-contamination, and greatly reduces downtime for maintenance.

2.Precise Airlocking & Low Leakage Rotor-housing gap precisely controlled at 0.1–0.2 mm, significantly reducing air leakage. Ensures stable pneumatic conveying, accurate metering and lower energy consumption.

3.Complete Materials & Processes, Corrosion & Wear Resistant Base materials: SUS304/SUS316L, carbon steel. Material-contact surfaces can be coated with wear-resistant coatings, polymers, etc. Internal/external surfaces finely finished, suitable for corrosive and highly abrasive materials.

4.Full-Condition Adaptability, Dual-Use for Conveying & Metering Compatible with positive/negative pressure, low/high pressure, and gravity feeding. Supports variable-frequency speed regulation and PLC automatic control, meeting continuous discharge and batch/formula metering requirements.

5.Safety & Compliance, Dual Certification for Explosion-Proof & Sanitation Covers Zone 20/21/22 explosion-proof grades. Flameproof/explosion-proof models withstand up to 16 bar. Adapts to Class 10,000, 100,000, 300,000, Class C/D clean areas. CE, TÜV and other authoritative certifications obtained.

4. Technical Specifications

4.1 Material Selection

• Stainless steel: SUS304, SUS316L
• Carbon steel: Painted carbon steel, nickel-plated carbon steel
• Wear/Corrosion resistance: Tungsten carbide-coated stainless steel, PE, PTFE, PA, ceramic coating, polymer materials

4.2 Structure & Sealing

• Structure: Quick-release/non-quick-release, sanitary/non-sanitary
• Shaft seal: Lip seal, air-tight seal
• Gap: Rotor-housing  0.1–0.2 mm
• Flange: HG20592 standard flange

4.3 Explosion Protection & Safety

• Explosion grade: Non-explosion, Zone 20/21/22
• Explosion configuration: Explosion-proof motor, 16 barpressure resistance, precise gap
• Clean grade: Class W, 10W, 30W, Class C/D clean areas

4.4 Working Conditions & Performance

• Positive pressure conveying: Low pressure ＜0.4 bar; High pressure 0.4–1 bar (variable frequency)
• Negative pressure conveying: Low pressure ＞-0.4 bar; High pressure -1～-0.4 bar (variable frequency)
• Gravity feeding: Adjustable speed, leak-proof, dust-tight, adjustable flow
• Metering control: Variable frequency regulation, PLC control, batch metering, formula batching, automatic dosing
• Temperature: Ambient –15℃～60℃; Material 0℃～120℃
• Cooling: Optional water-cooled jacket
• Connections: DN50, DN100, DN150, DN200, DN300, DN350

4.5 Surface Finishing

• External: Painted carbon steel, sandblasted, shot-blasted, fingerprint-resistant, machined surface ＜0.8 μm
• Internal: Mirror finish, Ra ≤4/0.8/1.6 μm, tungsten carbide/ceramic/polymer coating

4.6 Cleaning Methods

• Manual cleaning after quick disassembly
• Online CIP cleaning
• Online WIP cleaning + manual re-inspection

5. Industry Applications & Suitable Materials

5.1 Food Industry

Coffee, chocolate, flour, milk powder, grains, starch, spices, salt, protein powder, whey powder, baking ingredients, powdered food additives, etc.

5.2 Pharmaceutical Industry

Antibiotic powder, vitamin powder, hormone formulations, fermentation products, pharmaceutical starch, lactose, microcrystalline cellulose, probiotic powder, vaccine lyophilized powder, health product raw materials, etc.

5.3 Chemical / New Energy / New Materials

Carbon black, PE/PP pellets, PTA, titanium dioxide, pigments, fertilizers, lithium battery anode/cathode materials, silicon powder, petroleum coke powder, fine chemical powders, etc.

6. Typical Solutions

6.1 Food & Pharmaceutical Sanitary Lines

Sanitary quick-release structure + 316L mirror polish + CIP online cleaning. Meets GMP and clean area requirements, anti-contamination, easy validation.

6.2 Chemical Explosion-Proof & High-Wear Conditions

ATEX certified + tungsten carbide/ceramic wear-resistant coating + precise gap. Safe and durable, stable airlocking, suitable for dust explosion-proof and highly abrasive materials.

6.3 Automated Metering & Batching Lines

Variable-frequency speed regulation + PLC linkage. Achieves precise flow control, batch metering and formula batching, improving production line automation and consistency.

6.4 Positive / Negative Pressure Pneumatic Conveying

Full pressure range coverage, low leakage, high efficiency. Reduces energy consumption, stabilizes conveying, eliminates material blockage and dust leakage pollution.

7. Certifications

CE, TÜV, Statement certifications. Complies with EU and international industrial safety, sanitation and explosion-proof standards.

8. Selection & Services

Customization across materials, structure, explosion protection, clean grade, connection size and control mode

Professional condition assessment, solution design, installation, commissioning and after-sales maintenance

Proven application cases across industries, reliable performance and good reputation

9. Conclusion

The Doebritz quick-release rotary valve features quick-release & easy cleaning, precise airlocking, safety & compliance, and full-condition adaptability. It helps food, pharmaceutical, chemical, new energy and other industries achieve efficient, stable, sanitary and safe powder/granule discharge and conveying, making it the preferred equipment for modern industrial production lines.