10 Liter Backpack
The Firexpress fire fighting backpack is a self-contained unit with 10 litres capacity for premixed water and foam. The unit is driven by compressed air delivered from a composite material air tank filled to 300 bars. The atomization and aspiration are made by the use of the compressed air. A pressure safety valve (370 bars) is mounted in the valve of the air tank.
The pressure of the air is reduced to 8.5 bars in a pressure regulator before it enters the water tank. A pressure safety valve (12 bars) is mounted in the pressure regulator. When the air enters the water tank, it forces the water downwards and up into a tube inside the water tank and into a 1.2 metre discharge hose, which is connected to the Firexpress lance.
The lance is operated via a pistol grip. The lance used with the backpack is a shorter version of the normal Firexpress lance designed for easier manoeuvring in confined areas but with almost all the same features and benefits.
As the water supplied to the discharge hose originates from the bottom of the water tanks, only water is supplied into the hose. No air is forced into the hose as long as there is water in the tanks.
It is able to deliver more than 10 litres per minute at a range of 6-7 metres in spray mode or more than 24 litres per minute at a range of 16 metres in jet mode.
The backpack is the optimal solution when the fire fighter has to get to the fire through very narrow passageways like corridors on a ship or staircases in a building.