Tumbler Screen Sifter, Doebritz Separator, High-Capacity / ATEX Certified

Product Summary

The Doebritz Tumbler Screen Sifter is a high-performance, gyratory screening solution engineered for unparalleled accuracy in separating powders, granules, and flakes. Capable of handling up to 60 tons per hour with a screening area of 4.5m², this industrial sifter features ATEX-certified explosion-proof design and hermetically sealed dust containment. Ideal for fragile or abrasive bulk solids, it delivers 5-axis elliptical movement ensuring zero blinding and maximum yield.

Why Source Doebritz Tumbler Screen Sifter

• Superior Screening Efficiency: Achieves up to 95% separation accuracy with minimal dust escape, reducing product loss compared to conventional vibratory sifters.
• Ultra-Low Maintenance: Our patented drive mechanism with oil-lubricated bearings offers 50,000+ hours MTBF, slashing downtime and spare parts costs.
• Global Compliance, One Source: Every Doebritz sifter meets ISO 9001:2015 and ATEX Directive 2014/34/EU, simplifying your global procurement and site safety audits.
• Built for Harsh Environments: Full stainless steel 316L or carbon steel housing with CIP/SIP-ready design, backed by a 3-year corrosion warranty.

Housing & Rotor Engineering

The Doebritz Tumbler Screen Sifter housing is manufactured from precision CNC-machined cast 316L stainless steel with electropolished sanitary welds, eliminating crevices that trap material. The robust 5-arm gyratory rotor is dynamically balanced and equipped with wear-resistant thermoplastic rubber balls that self-clean the screen mesh via mechanical tapping. Our patented spring-tensioned screen frame allows tool-free mesh change in under 10 minutes, while the integrated air-purged shaft seal prevents dust leakage into the gearbox. The sifter operates with a 1.5-inch elliptical throw and adjustable frequency (180-300 RPM), delivering precise stratification for fragile agglomerates.

Technical Specifications

All Doebritz Tumbler Screen Sifters are engineered per ISO 4869-3 standards. Customizations for explosion-proof zones or high-temperature materials are available upon request. Below are standard configurations:

Specification	Detail
Body Material	Cast Iron GGG-40 / Stainless Steel 316L (Optional)
Screen Area	1.5 m² to 4.5 m² (Standard 3 models)
Mesh Size Range	50 micron to 50 mm (ASTM E11 compliant)
Motor Power	1.5 kW – 5.5 kW, 230/460V, 3-phase, 50/60Hz
ATEX Certification	II 1/2 D c T6 (Zone 20/21) / Optional II 2/2 G Ex h IIC T4
Seal Material	NBR (Standard) / Viton / Silicone for Pharma
Max Throughput	60 TPH (for flour, density 0.6 g/cm³)
Noise Level	82 dB(A) at 1 meter (enclosed option: 72 dB)

Heavy-Duty Application Scenarios

Pneumatic Conveying Systems

Integrates seamlessly upstream of dilute or dense phase pneumatic conveyors, removing oversize contaminants from polymer pellets, plastic regrind, or cement before destruction.

Silo Discharging & Central Screening

Mounted under silos or hoppers to screen whole-grain flour, powder coatings, or silica sand at rates up to 50 m³/h, preventing blockages and ensuring downstream quality.

Dust Filter Collectors Return Line

Directly connected to dust collector discharge for recovering valuable fines in chemical or pharmaceutical processes, reducing waste by up to 40%.

Frequently Asked Questions

Q1: What is the lead time for a Doebritz Tumbler Screen Sifter?

A: For standard carbon steel units (screen area ≤2.5m²), lead time is 4–6 weeks. Stainless steel (316L) or ATEX-certified orders require 8–10 weeks. Rush assembly (3 weeks) is available with express fees for OEM partners.

Q2: Do you support custom flange dimensions or inlet/outlet ports?

A: Yes. Doebritz offers full non-standard customization including DIN, ANSI, JIS, or sanitary tri-clamp connections. Please provide your pipe spec and bolt circle drawing for a tailored CAD proposal within 48 hours.

Q3: Is this sifter ATEX certified for Zone 20/21 dust environments?

A: Absolutely. The Doebritz Tumbler Screen Sifter is available with full ATEX II 1/2 D c T6 certification, including anti-static mesh, grounded drive components, and single-acting seals. Certificate No. Doeb-ATEX-4243 is verifiable online.

Q4: What maximum operating temperature can the sifter handle?

A: Standard Viton seals support up to 200°C (392°F). For higher temperatures (up to 450°C), we offer a high-temp configuration with graphite seals, ceramic-lined housing, and remote drive lubrication. Contact engineering for calcine or hot sinter applications.

Q5: Can the sifter be used for wet or sticky materials?

A: Yes, with optional features: a heated cover (60°C to 80°C) prevents condensation, and our ‘self-cleaning rotor’ with PTFE wipers reduces adhesion. For slurry applications (max 30% moisture), we recommend an ultrasonic mesh cleaning kit.