Self-priming diaphragm pumps

Ideal for pumping thick, muddy, abrasive liquids with solids in suspension.
They are used in construction and industry.



Drilling plants


Transfer and agriculture



Drilling plants


Transfer and agriculture



How the LB diaphragm pump works
The system consists of a diaphragm guided by a coupling rod. The flow generated by the movement of the diaphragm is controlled by check valves at the suction and delivery.

As the diaphragm rises away from the bottom of the casing it produces a vacuum which draws the liquid into the casing through the suction valve. When the diaphragm is on the downstroke, the liquid is expelled through the delivery valve.


  • Rapid dry self-priming down to 6 m in a few seconds
  • Can run dry indefinitely
  • High abrasion resistance
  • Large size solids handling
  • Capacity is proportional to speed
  • Simple construction: the parts subject to wear or aging, such as diaphragms and valves, are easily replaceable


  • Parts in contact with liquid in aluminium, cast iron or  AISI 316 stainless steel
  • Neoprene diaphragm and valves
  • Air cushion chamber to reduce pulsations in the suction line
  • Spring coupling rod to protect against damage due to solids
  • Solids handling up to  2.4"  (60 mm)
  • Liquid viscosity up to 1,000 cSt

Product range

Model Ports
  mm  in 
LB 60 50 2"
LB 65
LB 80 80 3"
LB 80 V
LB 80 V2
LB 100 100 4"
LB 1-4"
LB 2-6" 150 6"






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