Around-the-pump foam proportioning systems

Automatic foam premixing system 

For large quantities of foam

Around-the-pump foam proportioning systems mix foam compound to the whole amount of water. In foam operation, the water pump is always flooded with a water-foam compound mixture, i.e. the water-foam compound mixture can be discharged at all outlets.

Around-the-pump proportioner produce large quantities of foam (e.g. for turret operation).

Impresses with

  • Large foam compound outputs
  • Simple, cost-effective systems
  • Low need for maintenance, as no additional foam compound pump is required

Function

Around-the-pump foam proportioning systems mix foam compound to the whole amount of water. In doing so, drive water will be diverted from the pressure outlet back into the suction inlet. There is a Venturi set in the drive water line which creates suction for the foam compound. In this way, very high foam compound outputs can be generated - especially for turret operations.

 

In foam operation, the water pump is flooded with a water-foam compound mixture, i.e. water-foam compound mixture can be discharged from all outlets.

 

After operation the pump must be flushed and drained .

 

Due to the Venturi principle it is not possible to use the pump in hydrant mode and to produce foam at the same time, as in this mode no suction for foam compound can be generated.

 

These aroud-te-pump foam proportioning systems do not require their own foam compound pump, which is why there is no additional need for maintenance.

Around the pump foam system & proportioner - Rosenbauer

Benefits of around-the-pump foam proportioning systems

  • Suitable for very large foam compound outputs - especially for turret operation
  • Simple, cost-effective systems
  • Easy operation
  • Very robust
  • Low need for maintenance, as no additional foam compound pump is required
  • No additional drive energy needed
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