ATEX Certified Sanitary Filter: Doebritz Quick-Release Rotary Valve | 0.1-0.2mm Clearance & 16bar Explosion-Proof

High-Performance Sanitary Rotary Valve for Critical Powder Processing

Doebritz presents its ATEX certified sanitary quick-release rotary valve, engineered for the most demanding hygienic and explosive environments in the food, pharmaceutical, and chemical industries. As a key component in your production line, this valve ensures minimal air leakage (0.1-0.2mm rotor-to-housing clearance), superior cleanability, and robust explosion protection, making it the preferred choice for global OEMs and plant managers.

Why Source Doebritz ATEX Sanitary Valves

Precision Machined for Unmatched Airlock Efficiency

• Optimal Airlock Efficiency: The precisely controlled clearance between the rotor and housing significantly reduces air bypass, stabilizing pneumatic conveying systems and lowering energy costs. This precision is a hallmark of Doebritz’s advanced CNC machining capabilities.
• Superior Cleanability & Sanitary Design: The quick-release, tool-less disassembly allows for rapid and thorough cleaning. The valve supports online CIP (Clean-in-Place) and WIP (Wash-in-Place) cleaning protocols. Internal surfaces are polished to a mirror finish (Ra ≤ 0.4 μm), preventing product adhesion and bacterial growth, meeting strict GMP and FDA standards for sanitary processing.
• Hardened for Extreme Durability: Built to withstand abrasive and corrosive materials, the valve is available in SUS304 and SUS316L stainless steel. For high-wear applications, contact parts can be coated with tungsten carbide (TC) or ceramic coatings, dramatically extending service life and reducing total cost of ownership (TCO).
• Globally Certified Explosion Protection: Fully ATEX certified for operation in Zone 20, 21, and 22 hazardous areas. The flameproof construction is pressure-tested to 16 bar, featuring an ATEX-certified motor and precision-engineered clearances to contain any potential ignition source, ensuring the highest level of safety for your plant and personnel.

Detailed Technical Specifications

The Doebritz ATEX sanitary valve is available with a wide range of options to perfectly match your application. The table below outlines key engineering parameters.

Specification	Details
Body Material	SUS304, SUS316L Stainless Steel, Carbon Steel (with options for Tungsten Carbide, Ceramic, or Polymer coatings)
Rotor Design	8-vane open rotor, precision machined for high volumetric efficiency and low shear
Airlock Clearance	0.1mm – 0.2mm (rotor-to-housing, precision ground)
ATEX Certification	Zone 20, 21, 22 (Flameproof enclosure, pressure-tested to 16bar with ATEX motor)
Flange Standards	HG20592 (customizable to DIN, ANSI, JIS, etc.)
Connection Sizes	DN50, DN100, DN150, DN200, DN300, DN350
Shaft Sealing	Lip seal with air purge, packing seal (labyrinth seal options available)
Internal Finish	Mirror polish (Ra ≤ 0.4μm, 0.8μm, 1.6μm options)
External Finish	Satin, bead-blasted, or anti-fingerprint (Machined surface < 0.8 μm)
Cleanability	Quick-release for manual cleaning; Full online CIP/WIP capable
Operating Temperature	Ambient: -15°C to 60°C; Material: 0°C to 120°C (with optional cooling jacket)
Control Options	VFD ready, PLC integration for batch metering and automated batching

Heavy-Duty Application Scenarios

Sanitary Processing in Food & Pharma

In dairy, bakery, and pharmaceutical production, the valve’s hygienic design prevents cross-contamination. It seamlessly handles materials like milk powder, whey protein, spices, vitamins, and active pharmaceutical ingredients (APIs), ensuring product purity and safety.

Explosive Atmosphere Handling in Chemical & Mineral Processing

For processes involving powdered coal, carbon black, lithium battery materials, or fine chemical powders, the ATEX certification and robust construction provide a secure airlock. The valve ensures safe, reliable discharge from dust collectors, silos, and reactors operating in potentially explosive atmospheres.

Automated Batching and Metering Systems

When integrated with a Variable Frequency Drive (VFD) and PLC, the Doebritz valve offers precise control over material flow. This makes it ideal for batch metering, recipe formulation, and automated batching lines, ensuring product consistency and reducing waste.

Frequently Asked Questions

What is the standard rotor-to-housing clearance?

Doebritz’s standard precision ground clearance is between 0.1mm and 0.2mm to ensure minimal air leakage. Tolerances can be customized for specific process conditions.

How is the valve cleaned for sanitary applications?

The quick-release design allows for easy manual cleaning after disassembly. For automated cleaning, the valve is fully compatible with online CIP (Clean-in-Place) and WIP (Wash-in-Place) systems, with all surfaces designed to be self-draining.

Is the valve ATEX certified?

Yes, the Doebritz rotary valve is available with full ATEX certification for Zone 20, 21, and 22. This includes an ATEX-certified motor, a pressure-tested housing (up to 16 bar), and precision-machined clearances that prevent the generation of dangerous sparks.

What materials can this valve handle?

The valve is extremely versatile. It can handle a wide spectrum of materials, from fine, cohesive powders (like flour and titanium dioxide) to abrasive granules (like cement and minerals) and sticky materials (like carbon black and polymers). The choice of surface coating and sealing options can be tailored to the specific product.

What flange standards and sizes are available?

We offer a broad range of flange sizes from DN50 to DN350. The standard flange is per HG20592, but we can customize to meet ANSI, DIN, JIS, and other international standards upon request to ensure seamless integration into your existing system.