GSM model Medium Expansion foam generators expand foam to be used against ordinary combustibles, flammable and combustible liquids. Medium expansion applications are the best solution for three-dimensional fire hazards, where the hazard is not surrounded by a roof but it is contained within perimeter walls as a dyke. For adequate protection, medium expansion foam discharge should be dimensioned to submerge highest hazard in a protected space. For example, piping, valves or other equipment may be positioned over the ground level where the low expansion systems may not easily reach and cover them. GSM models generators create expansion rates up to 1:60 (depending on foam concentrate used) and available up to 2000 l/min @ 5 bar flow rates. Different flow rates at different pressures are available on request. The equipment consists of a stainless-steel body, internal expansion net and inlet connection port with calibrated orifice. Having no moving parts and a fixed orifice makes the equipment reliable and maintenance free for long term usage. Medium expansion generators may be requested either threaded connections, flanged connections or instantaneous connection means as required.