Pneumatic Conveying

What are Pneumatic Conveying Systems?

Pneumatic conveying is the process of moving bulk materials by utilising air pressure. The process begins with the discharge of bulk materials from their storage silo, hopper or big-bag. As the materials are released they can either be fed using a screw feeder, or fall into the pneumatic conveying system where they are met with pressurised air racing through sealed pipes or hoses. The system requires a difference in pressure between the beginning and the end of the pipeline, to control the material flow. An external transmitter is used to adjust the velocity and air pressure inside the system, taking into account the material, distance, or weight of the substance being transferred. As the bulk material meets the pressurised air, it begins travelling through a conveying hose, to a valve gate and/or pneumatic hammer, before being evenly distributed into another means of storage. A specialised coating solution can be used to help the materials move more effectively through the system, preventing any materials from clogging.

Having historically been used to separate bulk food material such as grain, pneumatic conveying is now used in a range of industries from fertiliser and pharmaceutical manufacturing, to recycling and waste collection.

SN Engineering are pleased to work in conjunction with many of our clients, by offering our own pneumatic conveying facilities for material testing. Get in touch to enquire about our facilities in Gloucestershire to explore our range of screw conveying, dust filtration and mixing and blending equipment.



Bart vessels are versatile, quiet, easy to Install and are compact in design.
They are able to transport fragile powders or materials that tend to agglomerate. Bart transporters are particularly suitable for humid locations, and in the food, chemical or pharmaceutical industrial sectors. Bart line is defined by its application flexibility and low capital & running costs.

Bart transporters are suitable for conveying lines up to 20m (55ft), with a capacity of 1Te/hr and a low conveying pressure ≤2 bar. can Also be designed for high temperatures applications, up to 200°C.

The Bart size is unique (capacity 24 litres), with a loading inlet @ Ø150mm and a conveying line at either 1.5”, 2” or 3”Ø.




Bart-one vessels have a capacity ≤ 20te/hr., depending on the length of the desired conveying line and the material being moved. Vessels come in a range of capacities from 80 > 900 litres. can Also be designed for high temperatures applications, up to 200°C.

Bart-one 80
Vessel suitable for conveying lines up to 50m (140ft) with a capacity of 80 litres and a conveying pressure @ ≤ 4.5 bar (tested @ 6 bar according the PED – European Pressure Equipment Directive ). Bart-one has a capacity of 2 te/hr, a loading inlet of Ø200mm and an conveying line at either 2”, 3” or 4”Ø.Bart-one has been designed for the standard method of transportation ( or hollow tube ). It is also suitable for movement with full tube for fragile materials, abrasive and mixtures and for use as a metering system on the scale.

Bart-one 150 – 300 – 600 – 900
The Bart-one transporters are available in 4 different capacities: 150 ; 300 ; 600 or 900 litres. All of them have a capacity from 3 > 20 te/hr. & are equipped with an advanced control system of air inlet. They are suitable for conveying lines up to 70m (200ft) and for conveying pressure @ ≤ 6 bar and have a loading inlet of Ø200 or Ø250mm.




The TPA line is equiped with cutting edge technology and is suitable for conveying lines up to 500m+ long, &/or with fragile and difficult products. Conveying capacities greater than 100te/hr. Often achieved. The TPA vessels are designed to guarantee the integrity of the granular or powdered materials during conveying whilst maintaining a high level of system efficiency.

The TPA transporters are available in three types, depending on the chosen system of transport:


The conveying line is emptied — purged after each cycle.

Full pipeline

The conveying happens with a full pipe. This permits air and energy saving compared with the conventional method. The TPA full pipeline vessels are used to move fragile and abrasive materials.

Full pipeline continuous

The use of two TPA full pipeline transporters, interconnected to a common conveying line renders the possibility of a constant conveying of the material within the pipe, further reducing the systems total cycle time—increasing process capacity & improved energy efficiency.




Clients can pre-examine conveying suitability of their product, where we don’t already have experience in that product, by utilising the fully equipped test / pilot plant.

The pilot pneumatic plant is able to perform tests on customers’ products, whether powdered or granular and verify transport features prior to fabrication. The laboratory has a materials database covering more than 2000 samples with the corresponding characteristics carefully determined, such as:

  • Air consumption
  • Pressure
  • Speed
  • Carrying capacity (maximum volume)
  • Yield coefficient
  • Fragility of the materials

And further information on request. The minimum amount of material needed for each test is 0.6m³.


  • Highlight important information for plant design
  • Optimise times and procedures during the system start-up.
  • Evaluate possible new solution
  • Show the system’s operation during the clients factory visit.




St St / CIP units


Just some valued clients

we’ve worked with

over the years

  • SN Engineering have available an extensive range of dry bulk materials handling components & equipment offering, existing & new clients, a reliable one-stop shop for all your needs.
  • Professional – Friendly & Efficient service throughout.
  • Technically qualified personnel with a wealth of practical experience to assist in product / system / plant selection.
  • Operation run under ISO9001-2008 guidelines* * Certification evaluation pending – Currently reviewing options / requirements post departing EU.
  • In house design / CAD facilities with qualified backup ( civil works as part of project ) when required.
  • Project management from conception to commissioning, however large or small the contract.
  • Installations undertaken under current CDM regs, where applicable, including roles of PD & PC if desired.

Get In Touch Today