Mixer unit for a fire extinguisher, to mix water and a foaming agent, has a piston to mix them together and force out the mixed foam with the piston position set automatically by the water level

摘要

The mixer unit (10) for a fire extinguisher, especially for mixing a foaming agent with water, has a water inflow (34) and a foaming agent inflow (36) with an outflow (38) for the extinguishing foam mixture. A piston (46) provides the pressure to mix the foaming agent and water and to force out the foamed mixture, with the piston position set automatically by the water level.