Portable Foam System
All Robwen foam products are automatic, discharge-side, mechanical systems powered only by the flow of water. The portable configuration is completely self-contained and ready to be put into service right out of the box as no installation is necessarily required.
The two primary applications for the portable are:
l. To be used as a true portable unit, placed in a hose lay remote from the apparatus.
2. To be used to convert existing apparatus to be foam capable without the expense of a full installation.
The four primary components that make up the portable are: bladder tank, differential pressure valve, control panel, and the manual refill pump. As pump water enters the differential pressure valve a portion of it is diverted through the control panel and into the bladder tank where it pressurizes the bladder. Foam then exits the bladder and passes back through the control panel and specifically the metering valve where the precise proportioning occurs. Accurate foam then passes to the low pressure side of the differential pressure valve and begins to mix with the water stream.
The portable features simple controls for flushing, draining, and for bypassing foam when plain water is required.
Robwen Built -in Foam System
All Robwen foam products are automatic, discharge-side, mechanical systems powered only by the flow of water. The built-in configurations are designed to be permanently installed on mobile fire apparatus. The systems consist of a differential pressure valve, a control panel, electric refill pump, and a bladder tank. The bladder tanks are available in 5 gallon (19 L), 7.5 gallon (28 L),
10 gallon (38 L), 15 gallon (57 L), and 20 gallon (76 L).
The ports on each of these four components come color coded to make installation simple.
These systems are suitable for use with Class A foam concentrate as well as 1% and 3% AFFF. They can be used on everything from small slip-on units to full Class A pumpers. The simple design with no moving parts has made the Robwen built-in a popular choice for firefighting agencies around the world.
Flow: 5 GPM (19 LPM) - 550 GPM (2085 LPM)
Pressure: 40 PSI - 450 PSI
Control panel dimensions: 8.5" W x 6.5" H x 3.75" D
Differential pressure valve: 21/2" inlet/outlet, 8.75" L
Bladder tank: all tanks are 11" in diameter
5 gallon: 20" L 7.5 gallon: 27.5" L
10 gallon: 35" L 15 gallon: 50" L
20 gallon: 65" L
The foam system shall be an automatic, discharge-side system that is only powered by the flow of water. The foam system shall be capable of delivering accurate foam concentrate at ratios from 0.1% to 1.0% and 3.0%.