Loading Bellows

What Are Loading Bellows?

Loading bellows are generally mounted underneath storage silos, to out-load and filter bulk materials vertically to stockpilers, trucks, ships or any form of bulk material handling equipment. The compact chamber prevents dust emission during the out-loading of powders or granular materials, with no physical contact required by the operator. Loading bellows can also be found at the rear of conveyors such as our screw feeders or pneumatic conveying systems, to allow bulk materials to flow efficiently from one storage solution to another. Our range of loading bellows can be manually or remotely operated and have been designed using our unique expertise in manufacturing equipment for bulk material handling.

Browse our range of remote filtration, integral filtration, stockpiler & combination loading bellows below.


OUTLOADER® 7000 / 7001 Series

  • Heavy duty, UK designed & built loading bellow
  • Loading capacity up to 250m3/hr
  • Twin loading bellows & fitted with product guide / wear chutes for added longevity
  • Loading bellows & chutes in various materials to suit product / application needs
  • Suitable for discharging powders —granulate into road / rail & open trailers
  • Road—rail units can be fitted with auto closer to eliminate residue during lifting
  • Can be fitted with various level devices for safer loading
  • Sa2.5 blasted, primed & powder coated for durability. St St contact parts also available
  • Large 150ø dust extraction point for interconnection to remote filter unit


OUTLOADER® 8000 Series

  • Designed with continuity of components with sister outloader
  • Fitted with integral dust filter & high efficiency extraction fan
  • Cleaning of dust filter via own compressed air receiver.
  • Pre-mounted & programmed controller for taking care of the cleaning sequence.
  • Plug & play for ease of installation, just connect power & air supply
  • All variants & options as available in the outloader range
  • All units fitted with high torque, braked, bevel helical gearboxes
  • All units fitted with park & slack rope sensors—the later can be utilised for filling cycle integration
  • All units have triple, st st, ropes for added safety & smooth lower / lifting operation



  • Designed for stockpiling of powder or granulate products into warehouses ; stock bins & ship holds
  • Oversized dust skirts to maximise dust extraction during discharge
  • Auto retract, via integral level devices, ensures efficiency of stockpiling
  • Up to 250m3/hr, larger units on request
  • SP model can be fitted to either outloader or outloader plus models
  • Hard wired or wireless remote options available
  • Host of bellow materials available to suit application / product characteristics



  • Control panels c/w Siemens logic for full control & integration into clients process
  • Combination tanker / open truck variation for loading of either from single unit
  • Remote filters for use with outloader’s
  • Different filter medias for outloader plus units to suit product characteristics
  • Wear chutes from engineered low friction polymers for those sticky products
  • Various level devices to suit application or clients specific brand, for plant standardisation
  • All units packed in specific open crates for safe and easy transportation, worldwide & for easy lifting into place during installation

Just some valued clients

we’ve worked with

over the years

  • SN Engineering have an extensive range of equipment for dry bulk material handling, 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 plant 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.

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