Aroma & Moisture
Spices lose aroma and cake when exposed to moisture and air.
- Our solution
- A closed silo in aluminum or stainless steel that protects the product.
- Your benefit
- Protected aroma and quality.
Solutions · Spice Storage
Spices are intensely aromatic, often colored, and high in value – and they must never carry their aroma or color into the next product. PW Silo Systems designs aluminum and stainless steel spice silos with discharge aids and clear product separation for seasoning, snack, and food producers.
Spice Storage at a Glance
A spice silo stores whole or ground spices close to production – for seasoning blends, snacks, sauces, ready meals, or meat products. It protects the spices from moisture and contamination and feeds them in a controlled way to dosing and mixing.
Ground spices are fine and tend to cake, many contain essential oils, and colored spices such as turmeric stain equipment. PW Silo Systems designs the silo, discharge aids, and product separation around your spices.
Why Spices Are Demanding
Spices are small-volume, high-value ingredients. Aroma, color, and purity depend on how they are stored.
Spices lose aroma and cake when exposed to moisture and air.
Ground spices are fine and oil-containing – they bridge and cake at the outlet.
Strong flavors and colors must not get into the next product.
In coated carbon steel silos, flaking paint and steel particles can end up in the spice.
Fine spice 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.
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 spice silo depends on your product, your process, your cleaning requirements, and your site – we review it with you.
Your Spice 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 moreSpices
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
Cinnamon, ground cinnamon
Cinnamon is on our list of bulk materials tested in our lab. Ground cinnamon is fine and tends to bridge.
Tested in our lab
Turmeric, ground turmeric
Turmeric is on our tested list. Its strong color makes dedicated storage important.
Tested in our lab
Ginger, ground ginger
Ginger is on our tested list. A closed silo protects its aroma.
Tested in our lab
Garlic, garlic powder, granulated garlic
Garlic is on our tested list. Its strong aroma requires clear product separation.
Tested in our lab
Cloves, ground cloves
Cloves are on our tested list. Whole and ground cloves are rich in essential oils.
Tested in our lab
Nutmeg, ground nutmeg
Nutmeg is on our tested list. Ground nutmeg is oil-containing and tends to cake.
Tested in our lab
Cardamom
Cardamom is on our tested list. Storage protects this high-value spice.
Tested in our lab
Vanilla, vanilla powder
Vanilla is on our tested list. Dedicated storage protects one of the most valuable spices.
Tested in our lab
Peppercorns, black pepper
Peppercorns are on our tested list. Silo and discharge are designed for round, hard kernels.
Also tested in our lab:
Send us your material data and we will review the right solution with you:
Spice Check
Type in your spice 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 spice 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 spices in silos.
Whole and ground spices can be stored in a properly designed silo. These spices are on our list of bulk materials tested in our lab:
Ground paprika, chili, cumin, coriander, onion powder, and seasoning blends we review with you based on your material data.
Both. Aluminum and stainless steel silos are widely used for spice 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 spice. That is why we build silos exclusively in aluminum and stainless steel.
We recommend a dedicated silo per spice – or PW StoreLine multi-compartment silos that keep several products separate in one silo. For frequent product changes, the PW ConeBlend blending silo has a hopper that is quick and easy to clean.
A closed silo protects the spices from outside moisture. Discharge aids such as PW SpeedBlow air fluidization and bin activators prevent bridging and keep the outlet clear.
In mass flow, the entire silo content moves downward when material is discharged – not just a channel in the center. Your spice 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 spice 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.
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 spice 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.