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- 98, avenue Général Patton - 51000 Châlons-en-Champagne
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10 000 t
Up to 10,000 tonnes can be
stored in a silo
Privé SA products
Grain Storage Silos: the grain silo
What is a grain storage silo?
A grain silo is designed to provide optimal storage for grains such as wheat, corn, rye, rapeseed, and soybeans, while adhering to strict hygiene standards. The steel structure of the silo offers protection against weather, pests, and diseases. It also enables the control of humidity and temperature, preserving the quality of the grain over extended periods. In contrast, flat grain storage is more susceptible to pests and infestations.
As such, the silo not only stores grain but also enhances its quality to meet market demands and regulatory requirements.
Silos offer several advantages over traditional storage buildings:
-Ensuring employee health and safety
-Guaranteeing food safety for consumers
-Efficient management of grain/products
-Combatting pests and infestations
-Promoting environmental sustainability
-Maintaining the quality and longevity of grain storage
Privé silos are cylindrical, the most effective design for optimal strength and stability during storage. In contrast, flat grain storage spreads out, requiring much more space.
Durability and Efficiency of Privé Silos
Privé silos are made from galvanized steel, which is highly resistant to corrosion, ensuring their durability and cost-effective maintenance. Grain is loaded into the silo from the top using various transportation methods, including bucket elevators, conveyor belts, and air pulse systems…
The advantages
- Walls constructed from Z600 galvanised steel (600 grams of zinc per m²)
- Galvanized bolts for added durability
- Privé silos are certified according to Eurocode, DIN 1055 (1987), and NFP 22-630 (1992)
Prive SA have been manufacturing silos in France for 60 years.
Privé SA exports 50% of its production.
Privé SA is certified ISO 9001.
Your Trusted Silo Specialist for Grain Storage Since 1958
Privé SA has been manufacturing high-quality silos in France for over 60 years and exports 50% of its production. Additionally, Privé SA is ISO 9001 certified, ensuring top-tier quality standards.
Our Range of Grain Storage Silos
Privé SA offers a variety of grain silos designed for both storage organizations and on-farm use. Our silos are tailored to meet the needs of farmers, cooperatives and storage agencies, providing reliable and efficient storage solutions.
CYLINDERS
STEEL ROOFS
CATWALKS
VENTILATION
CYLINDERS
CYLINDERS
- The galvanisation prolongs the life of the grain silo installed for food manufacturing, animal growth and breeding, agricultural or industrial production. The duration of protection is proportionate to the density of the zinc – for this reason Prive SA uses Z600 steel (600gm of zinc /m²) while other manufacturers use Z275 à Z450.
- The hole punching of the steel sheet is done in one press on the cylinder production line. The hole spacing of the grain cells are also very precise and this facilitates the silo build.
- The high tensile steel HTS allows the necessary weight reduction while adhering to safety regulations.
- The proximity of the Privé SA European steel suppliers reduces the environmental impact/footprint of producing our silos
- The corrugation of the silo cylinder sheets 104x12mm allows an excellent grain flow and limits grain and dust retention on the sheets. This in turn limits the risk of insect infestation.
The deeper corrugation used by other companies eg 76x18mm does not allow this advantage. - Privé SA bolts are galvanised (40à100 microns of zinc) which prolongs the life of the silo.
40 800 bolts are needed to build a 17,77m diametre , 20 rings grain silo; - Privé Base® is a system that allows strengthening and protection of the base of the silo with one ring of plastic coated steel 104mm in hight.
- Prive Base® accommodates for imperfections in the concrete base and also facilitates the cleaning of the interior of the grain silo.
- To help with the build of the concrete base Prive SA can supply metal shuttering.
STEEL ROOFS
Steel roofs
- Privé SA have adapted roof materials to deal with meteorological challenges ie snow, wind etc.
- The grain silo roofs are manufactured to respect snow and earthquake resistance requirements.
- The roof covering is in Aluzinc AZ185 or Magnelis ZM310 steel which prolongs the life of the silo. These coverings offer excellent resistance to corrosion. You can also choose galvanised lacquered steel (in different colours) for your silo.
- The roof support beams are S350GD+Z600 galvanised steel to comply with EN1034.
- The roof has pressure release zones to comply with ATEX regulations (explosive atmospheres)
- The central and lateral roof ventilation (0.10m²) allow fresh air to circulate around the stored grain which reduces the risk of condensation in the silo.
CATWALKS
Galvanised steel Catwalks
- The catwalks are made up of C shaped beams upto 6m long. Thus the catwalk is rigid and can take up to 200kg :m² in weight (NF E85-014 et NF EN ISO 14122-2 Part 2 standards)
- The supports for the conveyors are fixed every 1.5m on C shaped beams allowing the grain conveyor to carry a weight of 250kg per linear metre.
- 94mm x1.5m protection plates are placed between the C shaped beams and the catwalk.
- The catwalk has a pedestrian access made of galvanised metal grating (mesh 30/19 ; height 40mm) a foot guard and handrails.
VENTILATION
Ventilation
There are several ventilation solutions for the grain :
- Conical : Venticones.
- Flat :
Cylindres
TOITS EN ACIER
PASSERELLES
VENTILATION
Cylindres
Les cylindres
- La galvanisation allonge la durée de vie d’un silo à grain installé pour un élevage, une fabrique d’alimentation, une exploitation agricole ou industrielle. La durée de protection est proportionnelle à l’épaisseur du zinc donc Privé SA utilise de l’acier Z600 (600 grammes de zinc / m²) alors que de nombreux autres fabricants utilisent de l’acier Z275 à Z450.
- Le poinçonnage d’une tôle est principalement réalisé en un coup de presse sur la ligne de production des cylindres ainsi les entraxes des trous des cellules à grains sont précis et cela facilite le montage du silo.
- Les aciers à haute limite élastique permettent de réduire le poids de l’acier nécessaire, tout en respectant les règle de sécurité.
- La proximité des fournisseurs d’acier de Privé SA, exclusivement européens, permet de réduire l’impact environnemental de la production des silos.
- L’ondulation du cylindre du silo 104×12 mm permet un excellent écoulement du grain sur les tôles et limite les rétentions de grain et de poussière sur les tôles. Cela diminue le risque de présence d’insectes. Les ondulations plus profondes d’autres fabricants (par exemple 76×18 mm) n’ont pas cet avantage.
- La boulonnerie Privé est galvanisée à chaud (40 à 100 microns de zinc) ce qui allonge la durée de vie des silos. Pour monter un silo à grain de 17,77 mètres de diamètre de 20 viroles, 40 800 boulons sont nécessaires !
- Privé Base® est un système permettant de renforcer la protection de la base du silo avec une virole d’acier plastifié de 104 mm de haut.
- Privé Base® s’accommode de certaines imperfections du génie civil et facilite le nettoyage de l’intérieur du silo à grain.
- Pour faciliter la réalisation de la dalle en béton du silo, Privé SA propose un coffrage métallique.
TOITS EN ACIER
Les toits en acier
- Privé SA applique les conditions de vent et de neige du lieu de construction pour dimensionner les toits.
- Les toits des silos à grains sont adaptés pour répondre aux exigences de résistances à la neige et aux séismes de votre installation de stockage.
- La couverture des toits est en acier Aluzinc® AZ185 ou Magnelis® ZM310 ce qui prolonge la durée de vie du silo. Ces revêtements présentent une excellente résistance à la corrosion. Vous pouvez aussi choisir des toits en acier galvanisé laqué (de différentes couleurs) pour votre silo.
- La charpente du silo est en pannes Z en acier galvanisé S350GD+Z600 selon la norme EN10346.
- Les toits ont des zones éventables, pour respecter la règlementation ATEX (ATmosphères EXplosives).
- Les aérateurs centraux et latéraux des toits (section de 0,10 m²) permettent une circulation naturelle d’air au-dessus du grain stocké, ce qui réduit le risque de condensation de l’air dans le silo à grain.
PASSERELLES
Les passerelles en acier galvanisé
- Les passerelles des silos sont constituées de poutres en C, jusqu’à 6 mètres de long. Ainsi la passerelle est rigide et peut supporter une charge de 200 kg/m² (Norme NF E85-014 et NF EN ISO 14122-2, Partie 2).
- Des supports de transporteurs sont fixés tous les 1,5m sur les poutres en C, pour fixer les transporteurs à grain jusqu’à 250kg/mètre linéaire.
- Des protections (plats de 94mm x 1,5m) sont installées entre les poutres en C pour sécuriser la passerelle.
- La passerelle a un piétonnier avec des caillebotis galvanisés (maille 30/19, hauteur 40 mm), un garde-pied et 2 rambardes.
VENTILATION
Ventilation
Pour la ventilation des céréales, plusieurs solutions existent :
- Les fonds coniques : Venticône®.
- Les fonds plats :
Why choose a Privé silo ?
Established in 1946 – Prive SA has specialised in the manufacturing of grain storage silos since 1958.
The company has built a solid reputation on every continent and our expertise is world recognised.
10 year guarantee on Privé grain silos (see terms and conditions)
How to store and care for wheat to maintain its quality.
Grains are a living organism. With favourable conditions the grains will naturally germinate to form a new plant. The stored grain is an ecosystem.
The quality of the grain stored is a result of the grain itself and its environment.
Whatever the storage conditions, in the present of oxygen, the grains breath. The water content and the temperature of the grain influence the intensity of respiration which leads to a natural loss of material mass.
To limit the loss of dry matter and avoid germination the grain silo is the best solution.
The grain silo can be equipped with thermometry equipment to optimise ventilation.
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FAQ
FREQUENTLY ASKED
QUESTIONS
Privé SA operates through a network of resellers.
Depending on your project, we can either provide you with the contact details of an installer who will send you a quote for the complete installation (including silos, elevators, conveyors, reception pit, etc.), or we can send you a direct quote.
Privé SA manufactures all of its products in France, in the Marne department, in Châlons-en-Champagne (200 km east of Paris).
Yes, Privé SA offers a 10-year guarantee on its silos (see terms and conditions).
Privé SA can sell the equipment ex-works or deliver the equipment directly to the construction site.
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