High-Frequency Vibration Sieve, Doebritz Industrial Sieving, Stainless Steel 304 / ATEX Certified

Product Summary

Engineered for maximum throughput and precision classification, the Doebritz High-Frequency Vibration Sieve delivers unparalleled screening efficiency for dry bulk powders, granules, and flakes. Boasting a capacity up to 25 tons per hour (dependent on mesh and material), this unit features a patented high-G vibration motor generating up to 12 Gs of force. Certified for ATEX Zone 22 explosive dust atmospheres, the Doebritz sieve ensures safe operation in chemical, food, and mineral processing environments. With a minimal maintenance design and hermetically sealed housing, it eliminates dust leakage and provides 100% uptime for critical production lines.

Why Source Doebritz High-Frequency Vibration Sieve

As a 15-year veteran in heavy industrial equipment supply, Doebritz stands apart through vertical integration and CNC precision manufacturing. Unlike standard sieves that suffer from mesh blinding and structural fatigue, our units are built for 24/7 operation with extreme reliability. Procurement managers and plant engineers choose Doebritz for:

• Ultra-Low False Fine Percentage: Precision-machined screen frame and optimized material trajectory reduce oversize contamination by <70% compared to conventional rotary sieves.
• Minimal Structural Resonance: Finite Element Analysis (FEA) optimized housing eliminates harmonic vibration, extending bearing life to >50,000 operating hours.
• Quick Mesh Change System: Patent-pending cam-lock tensioning system reduces screen replacement time from 2 hours to under 15 minutes, drastically improving OEE.
• Global OEM Compliance: CE, ATEX, and GOST certified; supports non-standard flange drilling, inlet/outlet orientation, and sanitary finishes (Ra <0.8μm).

Housing & Rotor Engineering

The Doebritz High-Frequency Vibration Sieve features a fully welded stainless steel 304 housing (316L available on request) with a seamless internal finish to prevent material hang-up. The exciter drive assembly incorporates oversized, lubricated-for-life spherical roller bearings mounted in a cast ductile iron housing, isolated from the product zone by a dual-labyrinth seal. The screen deck utilizes a honeycomb support grid made from abrasion-resistant polyurethane, which distributes vibration energy evenly across the mesh surface, eliminating localised fatigue. The external counterweights are infinitely adjustable, allowing operators to fine-tune the vibration amplitude from 2mm to 8mm while the machine is running.

Technical Specifications

All Doebritz units undergo a 100% pressure test and vibration analysis prior to dispatch. Standard specifications for the model DSVF-1200 are listed below. Custom engineering for high-temperature (up to 350°C) and high-pressure pneumatic systems is available for global OEM partners.

Specification	Detail
Model	Doebritz DSVF-1200
Body Material	Stainless Steel 304 (316L optional)
Screen Diameter	1200 mm (47.24 inches)
Motor Power	2 x 1.5 kW High-Frequency Vibrator
Vibration Frequency	1,500 – 3,000 RPM (Adjustable via VFD)
Centrifugal Force	Up to 25 kN (12 G peak)
Number of Decks	1 to 3 (Single, Double, Triple separation)
Mesh Size Range	0.5 mm to 25 mm (Standard 2mm, 5mm, 10mm offered)
Processing Capacity	Up to 25 tons/hour (bulk density 0.8 t/m³, 5mm mesh)
Max. Operating Temp.	-20°C to +150°C (High-temp seal option to +350°C)
ATEX Certification	II 2D c T4 (Zone 21/22. Zone 20 variant available)
Connection Flange	Custom ANSI, DIN, JIS, or GB/T

Heavy-Duty Application Scenarios

Pneumatic Conveying Systems

Integrate seamlessly into dilute or dense phase pneumatic conveyors. The Doebritz sieve removes foreign contaminants and de-dusts pellets before they enter a blender or extruder. Its air retention design maintains system pressure without blowback.

Silo Discharging & Protection

Mounted directly below storage silos, the High-Frequency Vibration Sieve prevents bridging and ensures a consistent flow of calcium carbonate, PVC powder, or cement. It protects downstream equipment (mills, packers) from tramp metal or agglomerates.

Dust Filter Collectors (Product Recovery)

When installed in a closed-loop system with a dust collector, the Doebritz unit sieves collected fines back into the primary product stream, reducing waste and improving yield in chemical and pharmaceutical manufacturing.

Frequently Asked Questions

Q1: What is the typical lead time for a Doebritz High-Frequency Vibration Sieve?

A: For standard sizes (e.g., DSVF-800, 1200) with cast iron housing, our lead time is 3-4 weeks from order confirmation. For full stainless steel 316L or ATEX-certified units with custom mesh sizes, lead time extends to 5-6 weeks. We offer expedited manufacturing for critical breakdowns at 2 weeks (additional charge applies).

Q2: Can you customize the inlet/outlet flange to match my existing pneumatic line?

A: Absolutely. Doebritz specializes in OEM custom engineering. We can machine any flange standard (ANSI 150#, DIN, JIS, or customer drawing) and adjust the inlet/outlet orientation (0°, 45°, 90°) without additional engineering fees for lots of 5+ units. Simply provide your drawing or dimensional sketch.

Q3: Is the Doebritz sieve ATEX certified for Zone 20?

A: Our standard High-Frequency Vibration Sieve is ATEX II 2D c T4 (Zone 21/22). For the highest Zone 20 (continuous dust cloud) classification, we offer a complete explosion-proof variant featuring encapsulated vibration motors, anti-static mesh, and grounding straps. This is a mandatory requirement for grain dust or fine aluminum powder applications.

Q4: How do you prevent mesh blinding with fine powders like 325-mesh lime?

A: The Doebritz solution combines three actions: high-frequency (3,000 RPM) low-amplitude vibration to keep particles in suspension, polyurethane sliders (bouncing balls) under the screen deck, and an optional ultrasonic deblinding system. This trio ensures 99.5% open area even with cohesive hygroscopic materials.

Q5: What is your warranty and spare parts policy for international buyers?

A: We provide a 24-month comprehensive warranty covering the housing, vibration motor, and screen frame. For critical customers in North America and Europe, we maintain a consignment stock of replacement mesh, bearings, and seals for 24-hour emergency dispatch. Full technical documentation and exploded view CAD are included.