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Low Expansion Foam
These
systems can ONLY be an addition to
the main fixed fire fighting system (CO2, water spray or high
expansion foam).
A
mixture of water with foam (12:1 maximum) is led to spreaders, monitors or
hydrants and it is at these points that air is entrained and the foam produced.
There must be sufficient points of delivery to give a foam blanket of 150mm
over the risk area.
All
equipment must be located outside of the protected machinery space.
There
are two main types: ‑
1)
Pressurised System
Premixed
foam & water is stored in a tank which is pressurised when required by CO2
This
system needs no source of power or pumps and is immediately available.
2)
Ratio or Metered System
Foam
compound in a tank is mixed with pumped water as required. This has the
advantage of a smaller volume fixed tank that does not need to withstand extra
pressure, but the system now requires pump(s) and a power supply.
3 comments:
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The information about oil cooling was quite interesting because temperature problems are sometimes mistaken for other mechanical issues. When hydraulic oil becomes too hot, the machine may show reduced performance, slower movement, or inconsistent operation. Instead of immediately blaming the pump or another component, checking the cooling system can be a sensible first step. A water oil cooler can help manage heat when the system generates more heat than the existing cooling arrangement can remove. However, I think regular temperature monitoring is just as important as installing the cooler itself. It provides useful information about how the machine behaves under different loads. If temperatures gradually increase over time, that could also indicate a developing maintenance issue such as restricted flow or dirty heat-transfer surfaces.
When machinery operates continuously, a dependable water oil cooler can help manage oil temperature effectively. This makes proper cooling an important consideration for industrial applications.
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