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.

                                                         Specifications

                            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%.