CAFS Introduction IFE/JOIFF Seminar 20 December 2004 By Andy Roe Godiva /Hale Products Europe Ltd
Terminology • Class A Foam is used on solid combustible Materials with an application rate between 0,3% and 1,0%. Class A Foam Agents have different characteristics from other Foam Agents. • Class B foam is used on liquid fuel fires with an application rate of 1% upwards • CAFS stands for Compressed Air Foam System. Foam aspiration is enhanced by pressurized air within the pipearrangement inside the vehicle, then carried through the hoselines to the nozzle. CAFS may be used on Class A and on Class B fires.
How Is Foam Produced?
Foam Concentrate
Water Water
Water/Foam Mixture
Water/Foam Mixture Finished Foam Product
Power and Air Supply
Typical composition of CAFS Foam Water
• Water -100 Litres • Foam Agent - 0,5 Litres • Air - 750 Litres (may depend on Air Setting)
Foam- Agent
Air
Improved water application with Class A Foam and CAFS Efficiency of water application
100 90 80 70 60 %
R u n Of f
50
E x t i ngui s hi n g
40 30 20 10 0 Wa t e r
C l a s s A Fo a m
C A FS
Facts and Figures Cost of Damage and Savings in Millions Euro
2.5
Cost of Damage with CAFS Cost of Damage without CAFS Saving
2 1.5 1 0.5 0
House
Institution
Factory/Industrial Site
Refinery Pump Fire • Flange at 5 bar • 600 Litres flammable Liquid (100 litre gasoline/300 litres diesel/200 litres waste) • Spill area approx 42m² • Pre-burn time 30 – 40 sec. • AFFF and dry chemical as support
400 350 300 250 200 150
AFFF 3%
100
CAFS/AFFF 1%
50 0 Seconds
Water l*10
Distillation Tower Fire • 1100 Litres flammable liquid (300 litres gasolene/700 litres diesel/100 litres waste) • 100 m² spill area • Approx. 40 sec pre-burn time • AFFF and dry chemical as support
500 450 400 350 300 250 200 150 100 50 0
AFFF 3% CAFS AFFF 1%
Seconds Water l*10
Alarmierung: 24.09.2004, 17.41 Uhr, A3, Km 178,5, brennt Tankzug Die Feuerwehr Neu-Isenburg trifft um 17.49 als erste Feuerwehr ein.
FoamLogix 3.3/5.0
•One touch control of foam system •Preset induction rate •Indication of usage
DZA2 – FM1.0V DZA4 – FM2.5V DZA8 – FL2.1/3.3 DZA16 – FL5.0 Max presure drop 2 bar Accuracy +/-20% when 1%
CAFS 90 System Overview • Fire Pump delivers the water to the Foam System • The function of Fire Pump is not affected. • The HALE System injects Foam proportional to the flow rate. It is not affected by pressure • The HALE Compressor is matched to the Fire Pump and supplies air for agitation of water foam solution • HALE Control System maintains pressures and flows and provides safety interlocks. This ensures uncomplicated operation of the system • The HALE ARC Valve maintains the Air- Water ratio.
Benefits of CAFS • Firefighting capacity of vehicles enhanced • Increased efficiency of resource deployment • Quicker, more efficient and lasting knockdown of fire from initial attack • Reduction in exposure of firefighter to stress and danger • Reduced fire damage • Reduced water damage • Reduced business disruption due to the above • Reduced environmental impact • ‘Same tools’
Exceptional Throw
HALE CAFS
Exceptional “throw” characteristics safety of firefighter In operation, hose Water weight dramatically only reduced Efficient use of water resources Simple to operate Failsafe supply of water to firefighter Both monitors operating at 5 bar
INTEGRATED CAFS Compact size Single package Pump compressor matched Easy installation Minimal size Maximum performance Hose reel or layflat usage
INTEGRATED CAFS (WTAC) CAFS Mixing chamber
A.R.C. Valve Wet or Dry Foam Selector Foam Induction System
INTEGRATED CAFS (WTAC) Compressor Heat Exchanger
Compressor
“HG”Gearbox FoamLogixTM
European En/DIN compliance CAFS • • • • •
Only European standards under review DLS1200 – CAFS50 DLS2400 – CAFS 90 DLS4800 – CAFS 200 Water : air ratios between 1:3 – 1:20
Air ratios stepless 3:1 to 20:1 Din standard compliant
Conclusions • Firefighting capacity of vehicles enhanced • Quicker, more efficient and lasting knockdown of fire from initial attack • Reduction in exposure of firefighter to stress and danger • Reduced fire damage • Reduced water damage • Reduced business disruption due to the above • Reduced environmental impact • Improved FIU capability • Tool for the future
