High-expansion foam is a kind of mechanical air foam, which is formed by uniformly mixing water and high-expansion foam fire extinguishing agent in a certain way according to the set volume ratio, and then using a generator to blow a large amount of air into the foam. Therefore, it is related to the device performance and parameters such as the driving mode of the generator, the expansion ratio and the mixing ratio of the proportional mixer, and is also related to the characteristics of the high-expansion foam fire extinguishing agent.

　　introduce

　　High-expansion foam is a kind of mechanical air foam, which is formed by uniformly mixing water and high-expansion foam fire extinguishing agent in a certain way according to the set volume ratio, and then using a generator to blow a large amount of air into the foam. Therefore, it is related to the device performance and parameters such as the driving mode of the generator, the expansion ratio and the mixing ratio of the proportional mixer, and is also related to the characteristics of the high-expansion foam fire extinguishing agent.

　　The base material of high-expansion foam fire extinguishing agent is synthetic surfactant, so it is also called synthetic foam fire extinguishing agent, which can be used for foaming multiples of 201 times to 1000 times.

　　It is mainly suitable for fighting non-water-soluble liquid fires in Class A fires and Class B fires.

　　It is especially suitable for fighting fires in limited spaces, such as fires in garages, hangars, warehouses, and semi-basement buildings. High-expansion foam can not only extinguish fire, but also help to exhaust smoke and displace toxic gases.

　　working principle

　　When a fire occurs, the fire pump ② is started automatically or manually, and the pressure-type proportional mixing device ④ has pressure water flowing through it.

　　The corresponding valve ③ on the pipeline is opened remotely by the fire control center or the automatic control cabinet, and the foam liquid stored in the device is injected into the proportional mixer from the capsule.

　　After the foam liquid is restricted by the orifice plate, an appropriate amount of foam liquid enters the proportional mixer and is mixed with pressure water at a ratio of 3:97 to form a foam mixture.

　　Then supply foam generating equipment for fire fighting through pipelines, such as foam guns, foam guns, foam generators, etc., to generate air foam to extinguish Class A, B, and C liquid fires.

　　performance curve

　　Advantages

　　1. Large amount of foaming

　　The bubble diameter of the foam is more than 10mm, and the expansion ratio is between 400 and 800 times. Thus, the burning space can be quickly filled and the flame can be extinguished.

　　2. Easy to transport

　　Due to the low density and good fluidity of the high-expansion foam, under the action of the air flow that generates the foam, the foam can be transported to a certain height above the ground, a certain depth underground or through the foam conveyor belt (tube) or favorable terrain. Fight fires farther away from the surface.

　　3. Good heat insulation

　　When extinguishing a fire, a large amount of foam will not only separate the burning material from the air, but also submerge the personnel and equipment under the threat of flames in the fire scene, so as to protect them from the danger of flame heat radiation.

　　4. Easy to clean

　　The high-expansion foam is easy to clean after fire extinguishing. When it is manually removed, it can be directly defoamed by exhaust fans, flowering water guns, etc. When time permits, the natural defoaming method can also be used, and the doors, windows and ventilation holes can be opened. The speed of foam self-elimination is about 0.7m/h, and no trace will be left after disappearing.

　　Model Specifications

　　1. HG/T20592, ASME B16.5 and other implementation standards can be provided for the butt joint flanges of all specifications.

　　typical application