Heavy-Duty Vibration Screen, Doebritz Industrial Sieving, High-Capacity / ATEX Certified

Product Summary

Doebritz presents its next-generation Heavy-Duty Vibration Screen engineered for continuous classification of bulk powders, granules, pellets, and flaky materials in the most demanding industrial environments. Achieve unmatched screening capacity up to 150 t/h with a linear vibration stroke of 8-12 mm. Fully ATEX certified for Zone 22 (dust) and Zone 2 (gas), this unit ensures safe operation in explosive atmospheres while maintaining particle size separation down to 0.5 mm. Built as a direct OEM replacement for global processing lines, the Doebritz screen features hermetically sealed decks to eliminate dust leakage and cross-contamination.

Why Source Doebritz Heavy-Duty Vibration Screens

• Precision German Engineering: Every screen housing and exciter component is CNC machined from St37-2 or SS316L with tolerances ±0.1 mm, ensuring perfect OEM interchangeability.
• Minimal Downtime & Maintenance: Quick-release tension clamps and modular screen deck design allow mesh change in under 15 minutes. Outboard bearing housings isolate lubricated parts from processed material.
• Explosion-Proof & Safe: ATEX-certified vibration motors (Ex db IIB T4) and anti-static screen mesh as standard. Zero hot surface risks and integrated earth continuity.
• Global OEM Supply Chain: With 15 years serving mining, chemical, and food multinationals, Doebritz provides full traceability reports, 3.1 material certificates, and custom flange drilling per DIN/ANSI/JIS.
• Low Air Leakage & Dust Control: Silicone or PTFE gaskets between deck frames guarantee leakage rate <0.5% at 20 kPa negative pressure – ideal for pneumatic conveying systems.

Housing & Rotor Engineering

The Doebritz Heavy-Duty Vibration Screen housing is manufactured as a single-piece stress-relieved welded structure using 6-12 mm thickness wear-resistant steel or stainless steel 304/316L. Finite Element Analysis (FEA) optimized gussets and double-welded seam corners eliminate fatigue cracks even under 24/7 operation. The screen box features a 15° downward inclined deck for accelerated material travel and adjustable eccentric weights on twin vibration motors to generate linear, circular, or elliptical motion profiles. For abrasive materials like quartz sand or pet coke, an optional wear liner of AR400 or polyurethane extends service life by 300%. The vibration isolation system uses 28 Shore A natural rubber springs to protect support structures from transmitted forces.

Technical Specifications

Standard Doebritz models range from 1.0 m x 2.5 m to 2.5 m x 6.0 m screen area. Custom sizes available for OEM projects. Below are baseline engineering parameters for model DVS-18-48 (1.8 m x 4.8 m). Contact our engineers for complete data sheets including dynamic load calculations and K-Factor values.

Specification	Detail
Body Material	St37-2 carbon steel / SS304 / SS316L (specify at order)
Screen Deck Area	1.0-15.0 m² (custom widths available)
Vibration Frequency	960 RPM (standard) or 1440 RPM (high-G)
Stroke Amplitude	6-12 mm adjustable via eccentric weights
Separation Size	0.5 mm to 50 mm (cloth, perforated plate, or wedge wire)
Motor Power	2 x 0.75 kW up to 2 x 12.5 kW
ATEX Certification	II 3D Ex h IIIC T120°C X (Zone 22) / optional Zone 2 gas
Max Temperature	150°C standard / up to 400°C with HT upgrade
Connection Flange	DIN PN10 / ANSI #150 / JIS 10K or custom

Heavy-Duty Application Scenarios

Pneumatic Conveying Systems

Install the Doebritz Heavy-Duty Vibration Screen directly above dense or dilute phase pressure vessels to scalp oversized particles, agglomerates, or tramp metal before material enters the rotary airlock valve. The screen’s pressure-tight design up to 0.5 bar(g) and purged labyrinth seals prevent blowback and dust emission.

Silo Discharging & Pre-Screening

Mount the unit under silo outlets to separate lumps from free-flowing powders (cement, lime, plastic pellets). Flanged inlet compatible with all butterfly or slide gate valves. Optional ball deck or cubiloid grid breaks soft agglomerates.

Dust Filter Collectors

As a safety screen before baghouse or cartridge filters, the Doebritz unit removes fibrous or large particle debris that can blind filter media. Explosion vent panels available for ATEX dust environments. Ideal for wood pellets, recycled plastic flakes, and biomass dust.

Frequently Asked Questions

What is the typical lead time for a custom Doebritz vibration screen?

Standard models (DVS series) with cast iron/St37-2 housing ship within 4-6 weeks. Fully customized stainless steel screens with special flanges or ATEX Zone 1/21 certification require 8-10 weeks after approval of technical drawings. Rush manufacturing (3-4 weeks) available with expedite fee.

Can Doebritz provide non-standard flange drillings (e.g., JIS 10K, ANSI #150, or custom bolt hole patterns)?

Absolutely. As an OEM supplier to global process plants, we support any flange standard. You can supply a dimensional sketch or our engineering team will create a mating flange drawing within 48 hours. Minimum order quantity for full custom flanges is 4 units.

Is the Doebritz Heavy-Duty Vibration Screen ATEX certified for both gas and dust?

Yes, our standard offering includes equipment group II, category 3D (dust Zone 22) and 3G (gas Zone 2) certification. For higher risk Zones 1 (gas) or 21 (dust), we supply fully explosion-proof versions with Ex db/Ta motor, anti-static belts, and monitored bearing temperatures. Ask for our ATEX Compliance Pack.

What is the maximum operating temperature for this vibrating screen?

The standard silicone rubber gaskets and St37-2 housing handle continuous product temperatures up to 150°C (300°F). For high-temperature applications (up to 400°C / 750°F) like calcined alumina or hot sand, we offer a special version with SS316 housing, graphite gaskets, and heat-shielded vibration motors. An additional cooling deck can be engineered.

How do you control vibration transmission to the supporting structure?

Each Doebritz screen is mounted on progressive-rate helical coil springs or rubber buffers specifically tuned to the screen’s operating frequency (typically 960 or 1440 RPM). We also offer pneumatic actuators for active isolation on ultra-sensitive weighing platforms. Dynamic reaction forces are provided in our certified structural calculation report.