Solutions · Salt Storage
Salt attracts moisture, cakes, and is corrosive – three properties that decide how a salt silo must be built. PW Silo Systems designs aluminum and stainless steel salt silos with you – with the right material, discharge aids, and dust collection for your salt.
Salt Storage at a Glance
A salt silo stores table salt, sea salt, or mineral ingredients close to production – for bakery, snacks, seasonings, ready meals, or food processing. It protects the salt from moisture and contamination and feeds it in a controlled way to dosing and mixing.
Salt is hygroscopic: when it absorbs moisture, it cakes and bridges. Salt and brine can also attack metal surfaces. That is why the silo material, the design, and the discharge equipment are selected together with you for your salt and your site.
Why Salt Is Demanding
Salt looks simple, but moisture, corrosion, and dust decide whether a salt silo runs reliably.
Salt absorbs moisture from the air. Damp salt cakes into lumps and bridges at the outlet.
Salt and brine attack metal surfaces – especially in combination with moisture.
In coated carbon steel silos, flaking paint and rust particles can end up in the salt.
Fine salt dust spreads during pneumatic filling and conveying and settles on equipment.
In funnel flow, salt can stay in the silo for a long time while fresh product passes through the center.
Table salt, sea salt, iodized salt, and mineral ingredients must not be mixed by accident.
Silo Materials
We build silos exclusively in aluminum and stainless steel. Carbon steel is not an option for us: its coating is the only protection against corrosion – and salt is corrosive.
Which of our two materials fits your salt silo depends on the salt type, its moisture, your process, your cleaning requirements, and your site. We select the material and the design with you.
Your Salt Silo System
Silo, discharge, blending, filtration, and monitoring 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 moreMonitoring
Level measurement for reliable monitoring of the silo content – so you know when to reorder.
Learn moreSalts & Minerals
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
Salt, table salt, food-grade salt, sodium chloride
Salt is on our list of bulk materials tested in our lab. Silo and discharge are designed for its hygroscopic, corrosive nature.
Tested in our lab
Sea salt, fine and coarse sea salt
Sea salt is on our tested list. Its crystal size and moisture are considered in the outlet and discharge design.
Tested in our lab
Calcium carbonate, calcium
Calcium carbonate is on our tested list. It is a fine powder that tends to bridge – discharge aids are planned accordingly.
Review with us
Iodized salt
Iodized salt is used in food production and seasonings. Dedicated storage keeps it apart from non-iodized salt.
Review with us
Kosher salt, flake salt
Kosher salt has larger, irregular crystals. Outlet and discharge are matched to its crystal shape.
Review with us
Magnesium salts, magnesium carbonate
Magnesium salts are used as mineral ingredients. We review your product data with you before designing the silo.
Also tested in our lab:
Send us your material data and we will review the right solution with you:
Salt Check
Type in your salt 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 salt 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 salt in silos.
Dry salts and mineral ingredients can be stored in a properly designed silo. These products are on our list of bulk materials tested in our lab:
Iodized, kosher, and pickling salt, potassium chloride, and magnesium salts we review with you based on your material data.
Salt and brine can attack metal surfaces, especially together with moisture. We build silos exclusively in aluminum and stainless steel – never in coated carbon steel. Which material and which design fit your salt depends on the salt type, its moisture, your process, and your site. We select them with you.
A closed silo protects the salt from outside moisture. Discharge aids such as PW SpeedBlow air fluidization and bin activators break up bridges and caking and keep the outlet clear. The right combination depends on your salt.
In mass flow, the entire silo content moves downward when material is discharged – not just a channel in the center. Your salt 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.
Integrated filters and PW FilterLine dust collectors separate dust during pneumatic filling and conveying – in a hygienic design for the food industry.
We recommend a dedicated silo per salt type – or PW StoreLine multi-compartment silos that keep several products separate in one silo.
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 salt 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.
