Blagdon B50 Non-Metallic Diaphragm Pump

  • Max. Capacity 530 l/min

  • Max. Pressure 8.6 bar

  • Max. Viscosity 5,000 cP

  • Temperature Range Limited by elastomers - Up to 180 deg C.

Blagdon B50 Non-Metallic Diaphragm Pump

Blagdon Air Operated Double Diaphragm Pump. 

High Suction, Atex approved Pump for aggressive and hazardous chemicals.

Fully Submersible Pump. 


Up to 530 l/min

2" Air Operated Diaphragm Pump

Non-Metallic Construction 

Blagdon Air-Operated Double Diaphragm (AODD) Pumps provide high performance, reliable solutions for your pumping needs. They specialise in extreme condition environments and applications...keeping your process moving both above and below ground. Their AODD pumps have long been recognised as the "workhorse" of the industry for handling difficult liquids at relatively low pressures and flows. The range of applications is virtually limitless!
The pump chambers are alternately filled and emptied by drawing fluid in through a common (suction) inlet, and out through a common (discharge) outlet. The diaphragms in each chamber are linked by a common shaft so that they move backwards and forwards in unison. Compressed air is directed by the air valve alternatively, behind each diaphragm, to power discharge strokes. Pump speed, fluid output and pressure (or head) is controlled by increasing or decreasing the flow of compressed air to the pump.
Thomson Process Equipment & Engineering Ltd. supply Blagdon pumps into the markets of Ireland and Northern Ireland.

Common applications:

  • For corrosive liquids and chemicals
  • When metallic contact is not acceptable
  • Low cost, straight forward construction
  • When electrical power is not available
  • Noise sensitive areas


Pump type: Air Operated Double Diaphragm Pump
Control: Valve in air inlet (not included) 
Materials: Non-metallic casing (see options)
Fluid Connections: 2" (see options)
Max Solid diameter: 6mm
Max Flow rate: 530 litre/min
Max Discharge pressure: 8.6 bar
Air Inlet: 3/8" BSP (F) or NPT (F)
Pump weight: see options


  • Simple construction, easy to maintain & control
  • Self-priming, ideal for emptying containers
  • ATEX approved as option - intrinsically safe
  • Low break-out pressure
  • Reliable, proven pneumatic air valve
  • Strong, robust design
  • Manufactured in Shannon, Ireland


Casing materials: Polypropylene, Conductive polypropylene, PVDF
Construction Materials: Polypropylene/Aluminium (39.5kg), PVDF/Aluminium (50.5kg), Polypropylene/Stainless Steel (50.5kg), PVDF/Stainless Steel (70kg)

Internal material options: Nitrile, EPDM, Neoprene, Santoprene, PTFE, Viton (FKM), Polypropylene
Fluid Connection options: 2" ANSI #150 RF Flanges

Like all air operated diaphragm pumps, this pump requires a compressed air source to function.
Need a compressor and pump combo? Check out the compressors in the "Other Products" menu tab.