Linear Vibration Sifter, Doebritz Industrial Sifter, High-Capacity / ATEX Certified

Product Summary

Doebritz presents its high-performance Linear Vibration Sifter, engineered for continuous, heavy-duty screening of powders, granules, and flakes. Achieving throughput capacities of up to 25 tons per hour, this unit features a robust ATEX-certified design for explosive dust environments. With multi-deck configurations (2 to 5 decks) and a vibration frequency of 960 to 1450 RPM, the Doebritz Linear Vibration Sifter ensures precise particle separation from 1 micron to 50 mm, while minimising material degradation and dust emissions.

Why Source Doebritz Linear Vibration Sifter

When sourcing industrial screening equipment for global OEM supply or plant upgrades, procurement engineers demand longevity, process stability, and low total cost of ownership. The Doebritz Linear Vibration Sifter delivers a decisive competitive edge:

• Superior Screening Accuracy: Linear motion drive system ensures uniform material distribution across the full screen width, reducing blinding and pegging by 40% compared to conventional circular sifters.
• Ultra-Low Maintenance Design: Heavy-duty vibratory motors with outboard bearings allow for tool-free screen changes and extended MTBF (Mean Time Between Failures) exceeding 8,000 operational hours.
• Global Compliance Ready: Full ATEX Zone 21/22 certification, FDA-compliant food-grade finishes, and CE marking. All contact parts available in 304 or 316L stainless steel.
• Customisable for Any Bulk Solid: Options include dust-tight covers, inert gas purging, quick-release clamps, and anti-vibration isolation frames.

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Housing & Drive Engineering

The Doebritz Linear Vibration Sifter housing is fabricated from 5-8 mm thick stainless steel (AISI 304/316L) or abrasion-resistant carbon steel, reinforced by finite element analysis (FEA) to withstand continuous vibration stress. The drive unit integrates two counter-rotating vibratory motors, creating a linear throw angle adjustable from 30° to 60°. The screen box features a cascade inlet design with integrated baffle plates to prevent direct impact on the mesh. All welding seams are ground and electropolished to prevent material buildup, while silicone or PTFE gaskets provide complete dust sealing.

Technical Specifications

All parameters are validated on Doebritz’s CNC-machined test benches. Standard models cover widths from 500 mm to 2,000 mm and lengths up to 5,000 mm. Consult Doebritz engineering for customised sizing.

Specification	Detail
Model Range	Doebritz LVS-500 to LVS-2000
Deck Material	304 SS / 316L SS / Abrasion-resistant Carbon Steel
Drive	2 x Unbalanced vibratory motors, 0.75-11 kW each
Vibration Frequency	960 RPM / 1450 RPM (selectable)
Max Throughput	Up to 25 t/h (depending on material and mesh size)
Screening Area per Deck	0.5 m² to 10 m²
Number of Decks	1 to 5 (customisable)
Separating Cut Size	1 micron (with ultrasonic assist) to 50 mm
ATEX Certification	Optional: Zone 21/22, Ex II 2D T4
Operating Temp.	-20°C to +200°C (standard); up to +400°C (HT option)

Heavy-Duty Application Scenarios

Pneumatic Conveying Systems

Installed directly after rotary airlocks or blow tanks, the Doebritz Linear Vibration Sifter scalps oversize contaminants from flour, plastic pellets, and cement before dense or dilute phase conveying. The linear throw ensures steady feed into the conveying line with minimal pressure drop.

Silo Discharging & Pre-Screening

Mounted beneath silos, bins, or hoppers, this sifter removes lumps, agglomerates, and foreign objects (e.g., wood, paper, metal chips) from materials like sugar, sand, or chemical powders, protecting downstream mills, mixers, and packers.

Dust Filter Collectors

As a final quality assurance step, the Doebritz Linear Vibration Sifter grades recycled materials or finished powders, ensuring product consistency for industries such as 3D printing powder, toner, and metal powders. The completely enclosed design integrates seamlessly with dust collection systems.

Frequently Asked Questions

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

Standard models (non-customised) are shipped within 4-6 weeks. Custom sizes or special materials (e.g., 316L with FDA finish) require 8-10 weeks. Doebritz maintains a consignment stock program for high-volume OEM buyers.

Can Doebritz offer non-standard flange drilling or custom inlet/outlet positions?

Absolutely. Doebritz specialises in fully customised interfaces. Provide your dimensional drawing or mating flange standard (ANSI, DIN, JIS, or custom bolt circle), and our engineering team will adjust the sifter housings accordingly. Minimum order quantity for non-standard modifications may apply.

Is the Doebritz Linear Vibration Sifter ATEX certified for explosive dust atmospheres?

Yes, the Doebritz ATEX series is certified for Zone 21 (internal) and Zone 22 (external) according to EN 13463-1. The vibratory motors are Ex II 2D T4, and the housing is fully conductive with grounding terminals. Standard units are not ATEX rated unless specified at purchase.

What is the maximum operating temperature for this sifter?

Standard silicone gaskets handle up to 200°C (392°F). For high-temperature applications up to 400°C (752°F), Doebritz offers a specialised configuration with high-temperature springs, rated bearings, and Viton or ceramic gaskets. Please note that vibratory motor temperature ratings may limit overall system.

How many screen decks can be installed?

Doebritz Linear Vibration Sifters support 1 to 5 screen decks, allowing up to 6 fractions (overs and unders). Quick-release tensioning clamps and stackable frames make deck reconfiguration or screen replacement a 10-minute job without special tools.