Summary
Selecting a bulk solids equipment supplier is not just about price — it's about process reliability, compliance, and long-term support. Doebritz designs and manufactures
powder rotary valves, cone mills, lump breakers, and vertical mixers in-house, serving food, pharmaceutical, chemical, and lithium battery industries worldwide. This page explains our strengths as a specialized manufacturer and why engineers and procurement teams choose Doebritz for critical powder handling projects.
Who We Are
Doebritz is a specialized manufacturer of bulk solids handling equipment focused on:
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Powder Rotary Valves / Rotary Airlock Feeders (Drop-Through & Blow-Through)
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Cone Mills / Conical Screen Mills for gentle deagglomeration
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Lump Breakers / Lump Crushers for filter cakes and compacted powders
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Vertical Mixers for uniform dry blend conditioning
Unlike general equipment traders, we engineer every rotary valve and mill in-house — from rotor tip clearance calculation to CNC-machined housing and dynamic balancing — ensuring traceability, repeatability, and performance.
What Sets Doebritz Apart
Factory-Direct Engineering
You work directly with our engineering team, not through distributors. This shortens lead time, reduces miscommunication, and allows true customization — non-standard flange patterns (ANSI / DIN / JIS), special rotor geometries, outboard bearings, or side-discharge adaptations are handled in days, not weeks.
Application-Driven Design
We don't sell "one-size-fits-all."
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Abrasive powders → hard-faced / tungsten carbide adjustable tips + wear sleeves
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Combustible dust → ATEX Zone 21/22 certified with flame-quenching clearance & grounding
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Food & pharma → mirror-polished 316L, quick-clean rotors, FDA gaskets, EHEDG-aligned
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Battery cathode (NCM/LFP) → nitrogen-purged, low metal-ion shedding, electropolished
Full In-House Machining & Testing
Our facility integrates CNC machining, rotor balancing, and Factory Acceptance Test (FAT):
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Tip clearance verified with feeler gauges & dial indicator
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Pressure decay / air leakage test per spec
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Surface roughness measured (Ra ≤ 0.8 µm for sanitary)
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Rotational balance to ISO 1940 G6.3
Global Compliance & Documentation
Each shipment includes:
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Material Test Certificates (MTC / EN 102043.1)
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Dimensional & balance reports
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ATEX / IECEx certificates where applicable
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FDA / EC1935/2004 compliance declarations for food contact parts
Spare Parts & After-Sales Support
We retain CAD files and CNC programs for every serial-numbered valve — even discontinued models. Genuine spare rotors, seals, bearings, and tips are available with short lead times. Remote commissioning guidance and on-site supervision for large projects are offered.
Industries We Serve
✔ Food & Beverage — milk powder, sugar, spices, starch, infant formula
✔ Pharmaceutical & Nutraceutical — API blends, granule sizing, batch changeover
✔ Chemical & Mineral — fly ash, alumina, TiO₂, pigments
✔ New Energy / Battery — NCM, NCA, LFP cathode powders, anode carbon
✔ Plastics & Masterbatch — pellet metering, filler feeding
FAQ
Do you only sell rotary valves?
No. We supply cone mills, lump breakers, and can integrate them with rotary valves or mixers as a skid-mounted package.
Can you retrofit old valves from other brands?
Yes. Send us the nameplate photo and flange dimensions — we often supply custom rotors, end plates, or complete retrofit kits.
Do you provide test / trial runs?
For cone mills and lump breakers, lab-scale trials with your material are available upon request.
What is your typical lead time?
Standard rotary valves: 2–4 weeks. Sanitary / ATEX / heavy-duty: 4–8 weeks. Rush service can be discussed case-by-case.
Conclusion
Doebritz combines German-inspired engineering discipline with responsive Asian manufacturing. Whether you need a single DN100 sanitary
rotary airlock or a fully integrated deagglomeration–metering station for a battery cathode line, our team delivers engineered solutions backed by traceable quality and global support.
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