Electric drive diaphragm

Self priming diaphragm pumps

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Overview

Self-priming diaphragm pumps

Ideal for pumping thick, muddy, abrasive liquids with solids in suspension.
Often used for smaller wellpointing applications such as installing small pump chambers, where a vacuum prime centrifugal pump is too large.

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.

 

 

Product Information

Overview Inside the pump

Caffini Diaphragm Pump - Electric motor

  • 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
  • Aluminium or cast iron construction available
  • Single or three phase
  • Cart option

 

ModelSolids (mm)Max Head (m)Max Flow (l/min)Speed (rpm)
Lib 1-2 - 1.1kW28151702800
Lib 1-3 - 1.5kW50153302900
Lib 1-3 - 1.5kW50151201450
Lib 1-4 - 3kW60155002900
Lib 2-6 - 5.5kW60157501400
Overview Inside the pump
Caffini diaphragms

Diaphragm

Diaphragms made from
several different rubber
materials depending on your
application. Allows the
pump to pass large solids.

Caffini Simple Design

Simple design

No rotating part or seal in
contact with the liquid.

Caffini Helical Gears

Helical Gears

Helical cut gears reduces
noise and gear chatter during
operation.

Caffini Valves

Valves

Heavy rubber check valves
on suction and discharge

Caffini Suction Chamber

Suction Chamber

Chamber on the suction side
of the pump helps to reduce
surges in the flow

 

Caffini Drive Rod

Drive Rod

Caffini models have either
a sprung loaded or rigid
drive rod.

Caffini Spares

Spare Parts

Only a few spare parts
needed to keep these pumps
running! Very simple and
occasional maintenance

Caffini Construction

Construction

Cast iron, aluminium,
stainless steel or bronze
construction for wetted
parts.

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