Multi-deck Vibration Sifter, Doebritz Separator, 4,000 kg/h / ATEX Certified for Powder & Pellet

Product Summary

Engineered for continuous heavy-duty sifting, the Doebritz Multi-deck Vibration Sifter delivers high-capacity separation of dry bulk solids including fine powders, granules, pellets, and flakes. With a maximum throughput of 4,000 kg/h and up to four precision-decked screening surfaces, this unit ensures sharp particle cut points from 0.5 mm to 25 mm. The vibration drive system is ATEX certified for Zone 22 potentially explosive dust atmospheres, while the fully enclosed design guarantees minimal dust emission. All contact parts are manufactured from stainless steel 304/316L, and the sifter housing is CNC machined for perfect mesh tensioning and leak-proof operation.

Why Source Doebritz Multi-deck Vibration Sifter

• Industrial Longevity: Heavy-duty vibratory motor with 50,000-hour bearing life and quick-release mesh frames reduce downtime by 40%.
• Low Cross-Contamination: Sanitary welds and tool-free screen change design enable rapid product switchovers with zero dead zones.
• Global Compliance Ready: Every sifter meets CE, ATEX, and GOST standards; full documentation for FDA food-grade and pharmaceutical applications.
• Flexible Configuration: From 2 to 4 decks, 1,200 mm to 2,000 mm diameter, with choice of weld mesh, perforated plate, or self-cleaning ball-slotted screens.
• Direct OEM Support: 12-month warranty, lifetime technical support, and spare parts dispatch within 48 hours globally.

Housing & Rotor Engineering

The Doebritz Multi-deck Vibration Sifter features a modular, stackable housing design cast from GJS-500-7 ductile iron or fabricated from 304L stainless steel. Each deck is precision seam-welded to maintain absolute flatness, ensuring uniform material distribution across the entire screen area. The vibratory motor mounts on a reinforced base frame with oversize isolation springs that absorb 98% of dynamic forces, protecting surrounding equipment. Rubber bungs and silicone gaskets between decks achieve dust-tight sealing (leakage rate <0.5%). Quick-release tension rings use a cam-over-center locking system for one-tool screen replacement. For abrasive materials, optional wear liners in HARDOX or polyurethane can be installed on the inlet and outlet spouts.

Technical Specifications

All parameters are verified under factory load test. Custom modifications for non-standard flange drilling or special mesh sizes are available for fleet orders.

Specification	Detail
Body Material	Ductile Cast Iron GJS-500-7 / Stainless Steel 304L / 316L (on request)
Number of Decks	2, 3, or 4 (stackable modular design)
Screening Area per Deck	1.13 m² to 3.14 m² (1,200 mm to 2,000 mm diameter)
Max Throughput	Up to 4,000 kg/h (depending on mesh and material bulk density)
Mesh Range	0.5 mm to 25 mm (woven wire, perforated plate, or self-cleaning slotted)
Vibration Motor Power	1.5 kW to 5.5 kW, 400V/50Hz or 460V/60Hz, IP55
ATEX Certification	Zone 22 as standard; Zone 21 optional (-AT21 package)
Temperature Range	-20°C to +150°C (standard); +250°C with -HT option
Overall Height (3-deck)	450 mm (without frame), 680 mm with discharge hopper
Sealing Material	Silicone (food-grade), FKM/Viton, or graphite (high-temp)

Heavy-Duty Application Scenarios

Pneumatic Conveying Systems

Installed directly below dilute or dense phase conveyors, the Doebritz sifter removes oversize contaminants and agglomerates from materials like cement, fly ash, and plastic pellets before they enter storage silos or bagging stations, preventing downstream blockages.

Silo Discharging

When mounted on square or round silo outlets, the multi-deck design allows inline grading: fines for further processing, on-spec product for packing, and overs for regrind. The low-profile (450 mm total height) fits under most existing silo cones without major civil works.

Dust Filter Collectors

Used as a pre-filter for recycled dust from baghouses or cartridge collectors, the sifter separates reusable powder from tramp metal or fiber contaminants, significantly improving product yield in chemical and food recycling lines.

Frequently Asked Questions

What is the delivery lead time for a Doebritz Multi-deck Vibration Sifter?

Standard units with 2 decks and stainless steel contact parts are shipped within 3-4 weeks after order confirmation. Custom builds (special flanges, ATEX motor, or 316L full housing) require 5-6 weeks. Express delivery (15 days) is available for selected models with a surcharge.

Can the sifter be customized with non-standard flanges or inlet sizes?

Yes. We support complete mechanical customization, including DIN, ANSI, JIS, or customer-specific flange drilling patterns, as well as special inlet/outlet diameters from 150 mm to 400 mm. Minimum order quantity for full mechanical customization is 5 units or by agreement.

Is the Doebritz sifter available with ATEX certification for Zone 21 dust?

Absolutely. Our standard model is Zone 22 certified. For Zone 21 (higher explosion risk), we provide an ATEX-ready package: anti-static screen meshes, grounding continuity straps, a flameproof vibrator motor (Ex d IIB T4), and conductive gaskets. Request the ‘-AT21’ option code.

What high-temperature configurations are offered?

Standard silicone seals handle up to 150°C. For hot materials (e.g., dried sand, hot cement clinker up to 250°C), we offer high-temperature Version -HT: FKM/Viton seals, graphite-impregnated gaskets, and a thermally decoupled motor mount. The motor itself remains below 80°C with cooling fins.

How does Doebritz guarantee screen mesh tension consistency across all decks?

Each deck frame undergoes a CNC-controlled mesh stretching and epoxy bonding process that maintains tension within ±5 N/cm. We provide a factory tension certificate for every mesh, plus a hand-held tension meter is included with multi-unit orders for field verification.