Blagdon B50 High Pressure Diaphragm Pump

Max Capacity: 350 l/min

Max Pressure: 16 bar

Max Viscosity: 5,000 cP

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

Categories: , ,


Blagdon Air Operated Double Diaphragm Pump. 

Pump for high-pressure applications such as Paints, inks, dyes, coatings and resins. 

Fully Submersible Pump. 

Up to 350 l/min at 16 bar

1" Air Operated Diaphragm Pump

Metallic Construction suitable for high-pressure applications

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. 

Common Applications: 

  • Vast range of liquids and chemicals
  • Optional Atex certification available
  • Low cost, straight forward construction
  • When electrical power is not available


Pump type: High Pressure Air Operated Double Diaphragm Pump

Control: Valve in air inlet (not included) 

Materials: Metallic casing (see options)

Fluid Connections: 2" (see options)

Max Solid diameter: 6mm

Max Flow rate: 350 litre/min

Displacement: 1.9 litres/stroke

Max Discharge pressure: 16 bar

Air Inlet: 3/4" (see options)

Pump weight: see options list


  • Simple construction, easy to maintain & control
  • Can easily handle high visocity, high SG and high discharge pressure applications.
  • 1" Threaded Ports
  • ATEX approved as option – intrinsically safe
  • Reliable, proven pneumatic air valve
  • Strong, robust design
  • Manufactured in Shannon, Ireland


Casing materials: Aluminium/Aluminium (51.5kg), Stainless/Aluminium (75kg), Stainless/ Stainless (86kg) 

Internal material options: Nitrile, EPDM, Neoprene, Santoprene, PTFE, Viton (FKM)

Fluid Connection options: 2" BSP (F) or NPT (F) Threaded

Air Connection options: 3/4" BSP (F) or NPT (F) Threaded

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. 


What is the difference between IOT and IIOT Smart

What is the difference between IoT and IIoT Smart Manufacturing? What is the difference between IoT and IIoT? The difference...

Read More

Data Centres Ireland conference 2019

Thomson Process Equipment and Engineering will be showcasing our Fuel Transfer and Fuel Polishing skids at the Data Centres Ireland...

Read More

An Essential Business

An Essential Business - Thomson Process are still open for Engineering Support and Spares for Pumps During Covid-1 The Irish

Read More