Manufactured in-house
Medium Expansion Foam Generator
A medium expansion foam generator, built in stainless steel or galvanised iron with a stainless steel foam screen.
At a glance
- Shell
- Stainless steel or galvanised iron
- Nozzle
- Stainless steel, brass or gunmetal
- Foam screen
- Stainless steel
- Inlet flange
- ANSI B 16.5 or IS 1538
Specification
| Inlet flange | ANSI B 16.5 or IS 1538, stainless steel or carbon steel |
|---|---|
| Shell | Stainless steel or galvanised iron |
| Nozzle | Stainless steel, brass or gunmetal |
| Foam screen | Stainless steel |
| Support | Carbon steel |
Construction & operation
A medium expansion foam generator makes foam with an expansion ratio between 20:1 and 200:1 — the range NFPA 11 calls medium expansion. Foam solution is sprayed from a nozzle onto a stainless steel screen; the spray draws air through the shell, and solution and air form foam at the screen.
Medium expansion foam fills and blankets rather than flowing as a thin layer, so it suits bunded areas, pits and trenches, and spills of volatile liquids where vapour suppression matters.
Maintenance
- Keep the screen clean and undamaged; a torn or clogged screen spoils the foam.
- Check the nozzle for blockage, and the air path for obstructions.
- Test at the intervals the governing code sets.
Where it is used
Part of these fire fighting solutions
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