Flexilo Eco

General information
Silos for wood pellets

An increasing number of home owners switch over to environmentally friendly and energy-efficient heating with modern pellet furnaces. While before people were converting mostly basement rooms into storages – often on their own initiative – today more and more people use prefabricated storages to be set up anywhere or storages that are buried underground. The DEPI (German Pellet Institute) advises private customers to use prefabricated storages. The advantages of self-built storage rooms are a good use of available space and the possibility to reduce costs due to own contributions. But the risk of misplanning and poor execution of construction work is considerably higher with self-built storage rooms than with premanufactured storages. Ready-made storages offer a well-planned, wholistic storage solution that includes professional filling and discharge systems. They are especially suitable in damp basement rooms.

But what makes fabric silos of all silos an optimal storage facility for wood pellets? The manufacturing facilities of A.B.S. Silos – located in Germany – makes the silo sack for pellets out of high-strength, high-tech fabric. This fabric is adapted to the sensitive bulk goods, it is dust-proof and permanently electrostatically conductive. The flexible walls and a built-in impact protection ensure that your fuel is filled into the silo gently. Because the fabric is breathable, the feed air doesn’t have to be exhausted during the filling and there is no condensation due to temperature fluctuations. In addition to this we supply you with a robust wooden frame or a frame made of galvanized steel. If desired, it is possible to install the silos outdoors with the additional use of a (fabric) shelter against the weather.

Fabric silos from A.B.S. are easy to mount and dismount. The filling level is easily discernible – even without measuring technology. Cleaning can often be done simply by tapping the silo walls from the outside. Unlike with bunker silos, with fabric silos it is not necessary to enter the silo for cleaning, which can be very precarious due to the formation of nitrogen. A.B.S. has a huge repertoire of discharge devices, which affords a maximum of flexibility. We deliver the whole storage system compactly to you on a pallet. This way, every pellet silo can be carried through any narrow door or attic hatch to its destination.

Below, you can read more about our types of silos and our conveying systems. You will also find a planning aid.

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Here you will learn, among other things, what must be taken into account when filling, extraction and choice of storage location

Planning aid for wood pellet silos from A.B.S.

What makes our silos special:

For special requirements we use an exclusive special fabric, which was developed by the company founder Adolf Lesk together with the fabric manufacturer. This fabric is air-permeable, many times more high-strength than the standard fabric and permanently electrostatically dissipative.

High strength values and resistance: seams and fabrics are designed with at least seven times safety. Depending on the design and bulk material, we can even count on a hundred times safety factor. With our quality assurance system as well as modern work techniques, IT-supported processes and regularly trained staff we are one of the top manufacturers of flexible silos.

Frequently asked questions:

What do I have to consider regarding the fill level?

The manufacturer's information regarding the fill level for some storage systems has to be verified in detail because it often does not contain any understandable calculations.

Often a “from 1,8 to 2,5 m” range is indicated. Trough this we have extreme deviations. You should be careful and recalculate it by yourself. Residual amounts are mostly unavoidable, but we have to consider it, because this reduce the effective storage volume.

How do fine particles arise during the storage of wood pellets and in what quantity?

The pellet quality is determined according to fine particle content, length of the pellets and abrasion. Inexpert filling with excessive pressure or generally poor pellet quality result in a higher fine particle content. This can lead to malfunctions in conveying pellets from storage to boiler.

Incorrectly installed filling lines or 90° bends can also damage the pellets during filling. Filling without an impact wall on the storage room can virtually destroy the pellets. It can also occur that the return air is routed back into the storage on some suction systems.

What is the difference between discharge from the top and from the bottom?

Discharge from the bottom:
Pellets flow to the removal position in core flow, allowing them to be discharged regularly and evenly together with the fine particles. The outlet is freely accessible depending on the design.

Discharge from the top:
Discharge from the top with a suction lance requires more operating effort because the filling cone has to be moved to the side during filling.

What can I do when I run out of fuel?

How can I check my filling level?

How are pellets removed from a flexible silo and what is the role of the boiler?

What is the maximum amount of pellets I can store in a flexible silo?

A.B.S. silos can hold up to 40 t of pellets. As a rule, 15 t can be stored in the boiler room for one metre distance between silo and boiler. This value also depends on the heating output of the system, though (< 150 kW). You should research the details in the applicable fire protection regulations of your country or state, how many tons are allowed to store in a room and with what for a heating system (output).

Why do flexible silos have only one filling nozzle?

Why do some flexible silos have metal threads in the fabric?

What makes us so sure?

Over 85,000 A.B.S. silos installed worldwide give you the reassurance of having found a competent partner for your project. As experts for flexible containers, our team knows exactly what is important. We will be happy to provide advice for planning your silo system and to give you tips and suggestions – without obligation – on the perfect integration of A.B.S. silos while making best possible use of the available space.