Solutions · Protein Powder Storage
Plant and dairy proteins are fine, cohesive, high-value powders – and many of them are allergens. PW Silo Systems designs aluminum and stainless steel protein silos with discharge aids and strict product separation for plant-based, dairy, sports nutrition, and food producers.
Protein Storage at a Glance
A protein silo stores protein powders close to production – for plant-based foods, dairy, sports nutrition, bakery, or meat alternatives. It protects the powder from moisture and contamination and feeds it in a controlled way to dosing and mixing.
Protein powders are fine, cohesive, and tend to bridge, and soy, milk, and wheat proteins are allergens that must stay separate. PW Silo Systems designs the silo, discharge aids, and product separation around your proteins.
Why Protein Is Demanding
Protein powders are among the most valuable ingredients in a plant. Every challenge below affects quality, allergen safety, and uptime.
Soy, milk, and wheat proteins are major allergens and must not get into other products.
Fine protein powders are cohesive – they bridge at the outlet and cake during storage.
Protein powders absorb moisture from the air, which changes their flow behavior.
In coated carbon steel silos, flaking paint and steel particles can end up in the protein.
Fine protein 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 protein silo depends on your product, your process, your cleaning requirements, and your site – we review it with you.
Your Protein 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 moreProtein Powders
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
Pea protein, pea protein isolate
Pea protein is on our list of bulk materials tested in our lab. It is a key ingredient for plant-based foods.
Tested in our lab
Soy protein, soy protein isolate
Soy protein is on our tested list. A dedicated silo keeps soy – an allergen – separate.
Tested in our lab
Whey protein
Whey protein is on our tested list. Discharge aids are planned for this fine, cohesive powder.
Tested in our lab
Casein powder, sodium caseinate, calcium caseinate
Casein and caseinates are on our tested list. Dedicated storage keeps milk proteins separate.
Tested in our lab
Wheat gluten, vital wheat gluten
Wheat gluten is on our tested list. A dedicated silo keeps gluten away from gluten-free products.
Tested in our lab
Protein powder, protein blends
Protein powder is on our tested list. We design the silo around your specific blend.
Review with us
Rice protein
Rice protein is a hypoallergenic plant protein. We review your product data with you.
Review with us
Textured vegetable protein (TVP), soy chunks
Textured proteins come in many shapes and sizes. We review your product data with you.
Also tested in our lab:
Send us your material data and we will review the right solution with you:
Protein Check
Type in your protein 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 protein 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 protein powders in silos.
Dry protein powders can be stored in a properly designed silo. These products are on our list of bulk materials tested in our lab:
Rice, potato, faba bean, hemp, and sunflower protein, egg white powder, and textured proteins we review with you based on your material data.
We recommend a dedicated silo per protein – 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.
Fine protein powders are cohesive. Concentric mass-flow discharge combined with PW SpeedBlow air fluidization or bin activators keeps them moving.
Both. Aluminum and stainless steel silos are widely used for protein 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 protein. That is why we build silos exclusively in aluminum and stainless steel.
In mass flow, the entire silo content moves downward when material is discharged – not just a channel in the center. Your protein 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 protein 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 protein 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 protein 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.
