Bele S-800 high expansion foam generator


The Bele high-expansion foam generator is designed for total flooding systems or local application of high expansion foam. The massive volume of expanded foam will keep the water application to a minimum and extinguish through a combination of vapour surpression, cooling, oxygen reduction and wetting capability. Depending on foam concentrate used, it is also suitable for inside/hot air applications and polar solvents. As standard, the Bele S-800 have stainless steel 304 body, carbon steel red epoxy painted (RAL 3000) connection piping and brass nozzles.


  • For inside/hot air use
  • Excellent foaming properties
  • Recommended foam Fomtec LS EXP
  • DIN or ANSI flange option
Bele S-800 high expansion foam generator


The Bele high expansion foam generators can be used for
applications such as:

  •  Aircraft hangars
  •  Ship Holds and engine rooms
  •  Power stations and transformers
  •  Gas turbine generators
  •  Flammable liquid storage
  •  LNG vapour surpression
(1): The expansion ratio is depending on foam concentrate type. Results achieved in full scale tests. Please consult Fomtec for most suitable hi-ex foam concentrate for your application.

Technical data

Model BELE S-800
Flow rate L/min – 4 bar 719
Expansion ratio 4 bar (1) 500-650:1
Flow rate L/min – 5 bar 790
Expansion ratio 5 bar (1) 550-700:1
Flow rate L/min – 6 bar 854
Expansion ratio 6 bar (1) 600-750:1
Inlet connection ANSI flange
Weight Kg 138

Recommended foam concentrate

  • Fomtec LS EXP
  • Fomtec LS xMax
  • Fomtec LS aMax


The Bele S unit generator body, nozzle and pipework are shipped disassembled for packing/transport cost reasons. Foam generator mesh, connecting piping and nozzles need to be assembled before final installation. Bele units can be installed for horizontal or vertical hi-ex foam application. As per figure 1.1, the generator body is equipped with mounting feet to allow mounting to either wall or ceiling. 3 x support brackets (not included) must be properly fixated and able to carry the weight of the foam generator during operation. The foam generator is attached to foam premix pipe system with flanged connection as standard. The foam premix feeding line should be equipped with a strainer mesh size no greater than 2,5 mm.


The Bele high expansion foam generators are water driven, passive type, and do not require any other power source to function in case of fire. It can be attached to any foam proportioning system such as inductor, bladdertank or foam pump.
For correct operation make sure that:

  •  Air at the suction side is clean (depending on foam
    concentrate used).
  •  The foam generator mesh must be clean and free of grease and other foreign material.


After use:

  • Clean the strainer in foam premix line.
  • Clean the generator externally and internally with
    fresh water.


  •  Zinc plated inlet connection
  • AISI 316 stainless steel inlet connection