Vibration Sifter, Doebritz Vibratory Separator, High-Capacity 10-100 TPH / ATEX Certified for Powder & Bulk Solids

Product Summary

Doebritz Vibration Sifter is a high-performance vibratory separator engineered for continuous, dust-tight screening of powders, granules, pellets, and flakes. With processing capacity up to 100 TPH (depending on mesh size and material bulk density) and ATEX 22 / Zone 22 explosion-proof configuration, this machine ensures safe, efficient material grading in hazardous environments. The multi-deck design (2–4 layers) enables precise particle size classification, while the easy-clean sanitary construction complies with food and pharmaceutical GMP standards.

Why Source Doebritz Vibration Sifter

• 60% Longer Sieving Life: Patented tensioned screen mesh with anti-blocking tap system reduces blinding and extends screen replacement intervals by 60% compared to standard sifters.
• Minimal Dust Leakage (<50 ppm): Fully enclosed housing with silicone gaskets and clamp-lock covers maintains ultra-low dust emission, ideal for high-value API powders or explosive organic dusts.
• ATEX Certified Drive Motor: Integrated Ex d IIB T4 vibratory motor with flameproof enclosure eliminates ignition risk in grain, wood pellet, or chemical powder applications.
• Global OEM Supply Chain: All Doebritz Vibration Sifters are CNC-manufactured in ISO 9001:2025 facilities and support custom inlet/outlet flanges, electropolished 316L contact parts, and N2 purge ports for inert-gas blanketing.

Housing & Rotor Engineering

The Doebritz Vibration Sifter features a one-piece spun-formed housing made of 304L or 316L stainless steel (carbon steel optional for non-corrosive duties). The seamless dome lid prevents material accumulation, while the quick-release clamp rings allow tool-free access to all decks. The eccentric vibratory motor is mounted directly to the heavy-gauge base plate, generating adjustable 3D elliptical oscillation (2.5–5 mm amplitude, 1200–1500 rpm). The floating suspension springs (rubber or metal) isolate up to 95% of vibration forces from floor structures. All welds are ground and electropolished to <Ra 0.8 μm for sanitary grades.

Technical Specifications

Standard Doebritz Vibration Sifter models range from 600 mm to 1800 mm screen diameter. Custom widths and rectangular designs are available for high-capacity infeed. Below are key parameters for the Doebritz VSF Series:

Specification	Standard Model (VSF)	Sanitary Model (VSF-S)	High-Temp Model (VSF-HT)
Body Material	Cast Iron / 304SS	316L (Electropolished)	316L (with cooling jacket)
Screen Diameter	600, 900, 1200, 1500, 1800 mm	600, 900, 1200 mm	900, 1200, 1500 mm
No. of Decks	1–4	1–3	1–2
Max Capacity (TPH)*	Up to 100 TPH (1200 mm, 10 mesh)	Up to 60 TPH (1200 mm, 20 mesh)	Up to 80 TPH (1200 mm, 8 mesh)
Motor Power	0.55 – 5.5 kW	0.55 – 3.0 kW (IP69K)	Remote belt drive, up to 7.5 kW
ATEX Certification	Ex II 2D Ex tD A22 IP6X (Zone 22)	Ex II 2D Ex tD A21 (Zone 21, optional)	Ex II 2D Ex tD A22 + Gas Zone 2
Max Temp (Continuous)	-10°C to +80°C (standard seals)	-10°C to +120°C (silicone/PTFE)	Up to 300°C (remote motor + metal springs)

Heavy-Duty Application Scenarios

Pneumatic Conveying Systems

Integrated directly below dilute- or dense-phase pressure vessels, the Doebritz Vibration Sifter removes oversize contaminants (stringers, agglomerates, foreign objects) before material enters rotary airlock valves or blowers, preventing downstream blockages and product purity violations.

Silo Discharging & Blending Lines

Mounted on surge bins or feeding hoppers, the sifter breaks up soft lumps and ensures consistent particle size distribution for extruders, mixers, or bagging scales. The fully gasketed design eliminates cross-contamination when changing product grades.

Dust Filter Collectors

As a pre-filter separator for reverse-jet dust collectors, the Vibration Sifter recovers usable product from air stream fines (e.g., carbon black, cement, resin dust), reducing waste and baghouse loading by up to 40%.

Frequently Asked Questions

What is the typical lead time for a Doebritz Vibration Sifter?

Standard models (diameters 600–1200 mm, carbon steel or 304SS) are delivered within 4–6 weeks. For sanitary 316L, ATEX-certified, or custom-flanged versions, lead time extends to 8–10 weeks. Expedited 3-week service is available for emergency replacements.

Do you support non-standard inlet/outlet flange drilling patterns?

Yes. All Doebritz Vibration Sifters are made-to-order with any ANSI, DIN, JIS, or customer-specific bolt hole pattern. Minimum order quantity for custom flanges is 2 units. Provide your flange drawing for a dimension check within 24 hours.

Is the Vibration Sifter ATEX certified for Zone 21 (dust) and Gas Zone 1?

The standard Doebritz Vibration Sifter is ATEX Zone 22 (dust) and Zone 2 (gas) certified (IECEx optional). For Zone 21 dust environments, we offer a superior sealed EX tD A21 version with reinforced cable glands and anti-static screen mesh. Gas Zone 1 requires an upgraded Ex db motor and flame arrestors. Please consult our engineering team.

Can the sifter handle high-temperature materials (up to 250°C)?

Yes. Our High-Temp series replaces rubber suspension springs and silicone gaskets with high-tensile metal springs and PTFE/Teflon gaskets, coupled with a remote-mounted motor (belt drive). Maximum operating temperature is 300°C for 316L housing. Continuous operation above 150°C requires a cooling jacket option.

How does Doebritz ensure screen mesh tension consistency for fine sieving (below 100 mesh)?

Each Doebritz Vibration Sifter uses a pre-tensioned modular screen frame with adhesive-bonded mesh and adjustable compression bolts. We supply a digital tensiometer for on-site verification. For meshes finer than 200 mesh (74 μm), we recommend ultrasonic anti-blinding kits to maintain throughput.