Solutions · Cocoa Storage
Cocoa powder is fine, fat-containing, and cohesive – one of the more demanding food powders to discharge. PW Silo Systems designs aluminum and stainless steel cocoa silos with mass-flow discharge and discharge aids for chocolate, bakery, beverage, and confectionery producers.
Cocoa Storage at a Glance
A cocoa silo stores cocoa powder, cocoa beans, or solid cocoa butter close to production – for chocolate, confectionery, bakery, beverages, or dairy products. It protects the product from moisture and contamination and feeds it in a controlled way to dosing and mixing.
Cocoa powder contains cocoa butter, which makes it cohesive and prone to bridging and caking. PW Silo Systems designs silo geometry and discharge equipment around your cocoa product.
Why Cocoa Is Demanding
Cocoa products are valuable and sensitive. Every challenge below affects product quality and uptime.
Fat-containing cocoa powder is cohesive. It bridges at the outlet and cakes during storage.
In funnel flow, cocoa powder can stay in the silo for a long time while fresh product passes through the center.
In coated carbon steel silos, flaking paint and steel particles can end up in the cocoa.
Fine cocoa dust is combustible. Filling and conveying release dust into the silo and its surroundings.
Deliveries differ, and a silo filled in batches forms horizontal layers of different quality.
Natural and alkalized cocoa powder, beans, and cocoa butter must not be mixed by accident.
Silo Materials
Aluminum and stainless steel silos are widely used for flour, sugar, starch, and other food ingredients. Both materials offer high corrosion resistance, good hygiene, and a long service life.
Carbon steel is not an option for us: its coating is the only protection against corrosion. Once it wears, paint particles and steel can get into the product. Which of our two materials fits your cocoa silo depends on your product, your process, your cleaning requirements, and your site – we review it with you.
Your Cocoa Silo System
Silo, discharge, blending, filtration, and safety equipment are engineered as one system. That means fewer interfaces for your team and components that are designed to work together.
Storage
Concentric mass-flow discharge without asymmetric flow zones – as standard, site-assembled, indoor, or multi-compartment silos.
Learn moreBlending
Gravity blending and homogenizing with four technologies, including PW ConeBlend with a hopper that is quick to clean.
Learn moreDischarge
Air fluidization for uniform discharge of poorly flowing products – prevents bridging and can be retrofitted to existing silos.
Learn moreDischarge
Vibration from unbalanced motors breaks up cohesive forces, resolves caking, and keeps the outlet clear.
Learn moreFiltration
Dust separation during filling and conveying, in a hygienic design for the food industry.
Learn moreSafety & Monitoring
Rupture discs or explosion vents for combustible dust, level measurement for reliable monitoring of the silo content.
Learn moreCocoa Products
Products marked “Tested in our lab” are on our list of bulk materials. The others we review with you based on your material data before designing the silo.
Tested in our lab
Cocoa powder, natural and alkalized (Dutch-process) cocoa
Cocoa powder is on our list of bulk materials tested in our lab. Discharge aids are planned for its cohesive, fat-containing nature.
Tested in our lab
Cocoa beans, raw and roasted cocoa beans
Cocoa beans are on our tested list. Large, free-flowing beans are discharged in mass flow for clean stock rotation.
Tested in our lab
Cocoa butter, cocoa butter pellets and drops
Cocoa butter is on our tested list. In solid form it is stored in a silo; storage conditions are reviewed with you.
Review with us
Cocoa nibs
Cocoa nibs are roasted, broken cocoa beans. We review your product data with you before designing the silo.
Review with us
Cocoa shells, cocoa husks
Cocoa shells are a by-product of cocoa processing. Their low bulk density is considered in the silo design.
Review with us
Drinking chocolate powder, cocoa beverage mix
Cocoa beverage mixes combine cocoa, sugar, and milk powder. We review the blend with you.
Also tested in our lab:
Send us your material data and we will review the right solution with you:
Cocoa Check
Type in your cocoa product or any other bulk material to see whether it has already been tested in our lab. The list covers 287 bulk materials.
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Service in the U.S.
With more than 40 years of experience in silo engineering, we support your cocoa silo project from the first design discussion to commissioning. We deliver to every U.S. state and install with our own qualified personnel.
FAQ
Answers to the questions plant managers, engineers, and buyers ask most often about storing cocoa products in silos.
Cocoa powder, cocoa beans, and solid cocoa butter can be stored in a properly designed silo. These products are on our list of bulk materials tested in our lab:
Cocoa nibs, cocoa shells, and beverage mixes we review with you based on your material data.
Both. Aluminum and stainless steel silos are widely used for cocoa and other food ingredients because they offer high corrosion resistance, good hygiene, and a long service life. Which material fits your project depends on your product, your process, your cleaning requirements, and your site. We review the options with you.
In a carbon steel silo, the coating is the only protection against corrosion. If it wears or flakes off, paint particles and steel can end up in your cocoa. That is why we build silos exclusively in aluminum and stainless steel.
Cocoa powder contains cocoa butter, which makes it cohesive: it bridges at the outlet and cakes during storage. Concentric mass-flow discharge combined with PW SpeedBlow air fluidization or bin activators keeps it moving. The right combination depends on your powder.
We recommend a dedicated silo per product – or PW StoreLine multi-compartment silos that keep several products separate in one silo.
In mass flow, the entire silo content moves downward when material is discharged – not just a channel in the center. Your cocoa leaves the silo in the order it came in (first in, first out), and no product is left behind in dead zones where it could age or cake. Our PW StoreLine silos are designed for concentric mass-flow discharge without asymmetric flow zones.
Fine cocoa dust is combustible, and many bulk solids carry an explosion risk. For combustible bulk solids we supply explosion-protected silos designed in accordance with applicable codes and regulations. Venting devices – rupture discs or explosion vents – are selected for your silo, your product, and your application. Integrated filters and dust collectors reduce dust during filling and conveying.
Deliveries vary, and a silo filled in batches forms horizontal layers of different quality. PW BlendLine gravity blending silos homogenize the content so your production receives a consistent product. We offer four blending technologies; the right one depends on your cocoa and on whether you operate continuously or in batches.
Hygiene starts with the materials: aluminum and stainless steel offer good hygiene and corrosion resistance. In addition, our flat-roof designs support high cleanliness standards, PW SpeedBlow uses high air flow for cleaning, and the PW ConeBlend blending silo has a hopper that is quick and easy to clean – well suited to frequent product changes.
The right size depends on your daily consumption, delivery intervals, the number of products, and the space available at your site. PW StoreLine silos are available in a wide range of sizes and diameters, and silos too large for road transport are assembled on site. We size the system with you – without oversized investment.
Yes. We deliver to every U.S. state and support your project with silo transport, field assembly, silo installation and supervision, and site relocation of existing systems.
Very likely. Our silo systems are designed for nearly all free-flowing, granular, and powdered bulk solids. Send us your material details – kernel size, moisture, and how the product is filled and discharged – and we will review the right storage solution with you.
Tell us about your products, required storage capacity, how the silo is filled and discharged, and your site conditions. Based on this, we work out the material, silo type, and configuration with you and send you a detailed quote.
Your Project
Whether you need a single cocoa silo, several silos for different products, or a complete system with blending and discharge, tell us about your requirements. We'll develop a solution that fits your product, your process, and your site.
Send a Request NowWhat Happens Next
Tell us about your bulk material, your process, and your site conditions.
We work with you on material, silo type, and configuration – based on a bulk material analysis if needed.
You receive a custom-engineered solution with a detailed quote.
