Pumps & Extrusion Systems - Bulk Unloaders

Piston Pump, Diaphragm Pump and moving transfer liquids.
Bulk unloading pressure primer and production lines.

Rockingham Systems uses and supplies SKF Lincoln Industrial and Larius Pumps. When using these pumps we will analyse the application, chemical composition of the product to be used and required performance. We will then select the required gasket kit for the application and if necessary we make internal modifications to optimise how the pump works.

Pneumatic Double Diaphragm Pumps

Diaphragm pumps work by introducing compressed air through the pneumatic exchanger behind one of the two diaphragms, which generates compression and pushes the product into the delivery duct, at the same time the opposing diaphragm creates a vacuum and intakes product.

Once one stroke has been completed the pneumatic exchange valve diverts the compressed air to the opposite diaphragm and the cycle is reversed.


Many of our diaphragm pumps carry ATEX certification, and they all come in either Aluminium or Stainless Steel, offering maximum flow-rates of 21-900 Litres per minute.

Pneumatic Piston, Positive Displacement Pumps 

Positive displacement pumps work using a compressed air motor that moves the piston vertically up and down the shaft displacing the product into the inlet and out of the outlet.

The structure of the pumps (suction valve, pump piston and gaskets) allow the supply of material when the pump is ascending or descending.

Our piston pumps are ATEX certified, available in steel or stainless steel and come in the following ratios:

1:1, 2:1, 3:1 10:1, 15:1, 20:1, 23:1, 27:1, 30:1, 32:1, 40:1, 45:1, 60:1 & 68:1.

Extrusion Pressure Primers

Extrusion systems, also known as pressure plates or bulk unloaders are used for pumping highly viscous thixotropic materials. The pneumatic ram raises for loading and lowers into the drum forcing the material into the pump preventing cavitation.

Many of our extrusion systems are ATEX certified and can be used with 30, 60 and 200 Litre drums and 1000 Litre containers.

Thermostatic drum and IBC heater jackets are available as well as heated follower plates to assist with the extrusion process.

Industries Served

  • Automotive.
  • Aerospace.
  • Boat and Ship building.
  • Mechanics and engineering.
  • Electronics
  • Food production.
  • Food ingredients production
  • Furniture and furnishings.
  • Laminating and coating.
  • Appliance production.
  • Structural glass, facades and curtain walling.
  • Off-shore oil and gas.
  • Construction.
  • Off-site construction.
  • Printing
  • Paint, ink and adhesive manufacturing.
  • Paper.
  • Locomotive.
  • Petrochemicals.
  • Tanneries.
  • Water and liquid waste removal.
  • Cosmetic.
  • Flexography.
  • Oil, grease and chemical blending and manufacturing.

Materials Handled

  • Paints, inks and dyes.
  • Adhesives, Resins and Silicones.
  • Lubricants, greases and petrochemicals.
  • Latexes.
  • Bitumen.
  • Conductive pastes
  • Acids and Caustics.
  • Vegetable and mineral oils.
  • Food products.
  • Solvents.
  • Urethanes.
  • Lacquers.
  • General chemical products.
  • Corrosive, abrasive and high-density fluid.
  • Thixortopic, high-viscosity products.
  • Detergents.
  • Urea.
  • Ceramics.
  • Alcohol.
  • Cosmetics.
  • Composite and thermo-setting products.
  • Materials for tanneries.
  • Release agents.
  • Gear and motor oils.

Take advantage of our industry expertise and contact us with details of your application.

Pumps (1.57 MB)
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