MÖLLER Air Gravity Conveyors

Pneumatic conveying using air gravity conveyors from REEL

REEL MÖLLER®’s  air gravity conveyors utilise gravity and a little conveying air to transport fluidised bulk materials with minimum energy consumption.

The low-maintenance MÖLLER® air gravity conveyors take advantage of natural forces to transport fluidised bulk materials at rates of 2000 m3/h and more.


Very low maintenance, with no moving parts
Completely enclosed, dust-free system
Extremely low energy costs
Maximum flexibility thanks to extensive accessory options
Dense phase conveying, for high throughput


low-energy pneumatic conveying of dry bulk materials

Your conveying systems keep your process going. They need to be reliable, low-
maintenance and low cost. MÖLLER® air gravity conveyors harness the power of gravity,
giving you a system that is low maintenance, high efficiency and high performance.
Throughputs of more than 2000 m 3 /h are possible with very low energy consumption.

Air gravity conveyors: a pneumatic conveying system that just makes sense

With minimal fluidising air and a gentle incline, MÖLLER® air gravity conveyors transport dry and fine-grained mineral bulk materials economically and efficiently. Working at speeds of 2000 m3 /h and more, these enclosed systems are dust-free, low wear and low maintenance, yet highly efficient. They can be used across the plant, in applications such as conveying bulk material from silos to vehicle or ship loading facilities, receiving material from bucket elevators for further distribution to silo chambers, or where multiple material flows meet for transport on to a common station.

Thanks to the low conveying speed and simple construction, MÖLLER® air gravity conveyors convey even high volumes of materials gently, without segregation and with very low wear. This gives you a long equipment life with virtually no maintenance.

REEL MÖLLER® air gravity conveyors are built with flexibility in mind, so we’ve designed a variety of attachments and accessories to enable a broad range of uses. Branch points, distributing systems, ejection flaps, or shut-off units, and regulating units enable a large number of individual conveying section variations. Adaptations can also be made for high-wear or high-temperature materials up to 400°C.

Economical, low-maintenance pneumatic conveying with zero dust

Dust-free conveying

When you’re handling fine-grained materials like cement and fly ash, dust and spillage areas of real concerns. It’s bad for your equipment, and for the environment – not to mention your relationship with the local community. MÖLLER® air gravity conveyors are totally enclosed pneumatic conveying systems that give 100% dust-free conveying – no mess, no fuss. It’s also very quiet, since the only part to make noise is the system’s air supply, which is generally located in a remotely insulated area.

High throughput, low cost

Dense-phase conveying allows high material transport volumes with low conveying air use. It’s a gentle way of conveying large volumes of fine and powdery dry bulk without risking material segregation or grain attrition, ensuring optimum product quality even at throughputs over 2000 m 3 /h. The gentle incline of the air gravity conveyor – adjusted for each material and application – contributes to the easy flow of material, giving you incredibly low energy costs and easy operation.


The flexibility of MÖLLER® air gravity conveyors enables bulk material temperatures up to 220˚C as standard, and up to 400˚C with specially adapted fluidising fabric. Investment costs are low and you can build the system that best suits you with our extensive range of accessory options.

Low maintenance

Maintenance is often where your conveying system lets you down. It’s a messy business and there are a lot of moving parts. But that’s not the case with a pneumatic conveying system like the air gravity conveyor. Maintenance of the air gravity conveyor is very simple because there are no moving parts other than the air supply equipment. Air gravity conveyors require no lubrication.

With zero dust and very low maintenance, you get a highly reliable material transport solution that’s kind to the environment and to your operating budget.

Working with nature to deliver eco-friendly pneumatic conveying

So how do the Air Gravity Conveyors harness the natural force of gravity to provide gentle but high-volume pneumatic conveying?

The pneumatic Air Gravity Conveyors consist of an upper trough and a lower trough, with a porous fabric clamped between the two. Material to be conveyed is fed into the upper trough, while the lower trough is charged with a low-pressure fluidizing gas – usually air. This passes through the fabric and fluidizes the material, but the material can’t pass through the fabric.

Material flow is achieved by sloping the Air Gravity Conveyor to match the fluidized angle of repose to the powdered material. At the correct angle, fluidized materials flow with the consistency of a liquid. Every installation is tailored to your material and application. The whole process requires very little energy – just 0.02 kWh/t per 100 m of conveying length.

Our Air Gravity Conveyors have a robust and simple structure. As they are installed overhead, valuable floor space and added headroom are available for other purposes. By eliminating the need for massive support members, it permits flexibility of plant design not available with straight-line conveyors.

Low investment costs and energy-efficient operation result in an optimal pneumatic conveying system that is quiet and clean.

Typical Gravity Conveyor applications include:

Distribution from bucket elevators to storage silos
Gathering under baghouses/precipitators
Feed to process
Feed to other conveyors
Loadout from bulk silos to trucks, railcars, or barges
In-plant conveying
Storage silo/bin withdrawal
Join a dynamic group!
we are always on the lookout for new talents!
Reel, we hire all over the world

REEL Norway Receives TMS Award for Innovation in Aluminum Production

REEL Norway team has been very proud to receive The Minerals, Metals & Materials Society award at TMS Annual Meeting

Alba and REEL Alesa Celebrate Ship Unloader’s 25-Year Upgrade Success

Ship Unloader Upgrade Success: Alba & REEL ALESA Achieve Milestone in Operational Excellence!

REEL at ARABAL International Aluminium Conference 2023 Riyadh

We are present at ARABAL 2023 in Riyadh and available to address any of your needs. potlines, anode production, ports

Alumina Ship Loader En Route to Queensland Alumina Limited

Alumina Ship Loader En Route to Queensland Alumina LimitedOur brand new Alumina ship loader is ready and on its way to o