Foam tank Description: pressure foam proportioning device main tank, capsules, proportioner, water pipe, outlet pipe, drain valve, drain valve, safety valve, pressure gauge. Foam proportioning device is used to store foam extinguishing agent, through proportioner role in the fire water storage tank replacement foam extinguishing agent, and with the water by a certain percentage of the unit mix to form a foam mixture. Structural foam proportioning device can be classified according to both horizontal and vertical. The device used for liquid, liquid and semi-liquid spray foam under fire extinguishing system, foam sprinkler system, or as a foam gun, artillery fire mixture supply unit. Foam proportioning devices are widely used in oil storage tank area, chemical plants, aircraft hangars, oil, oil-fired boiler room, underground garage, storage of dangerous goods, chemicals, warehouses and other places. Works pressure foam proportioning device consists of a pressure tank with foam liquid capsules and use the venturi principle made PHY type pressure proportioner composition, when the system of water flowing through the pipe orifice pressure proportioner when the pressure difference before and after the formation of the orifice plate. Part of high pressure water (3% or 6%) through the foam tank inlet pipe into the tank, pressing the capsule, the capsule of foam concentrate through the foam tank to squeeze out the liquid pipe at the low pressure and water proportioner foam mixture to form a foam mixture mixed form of output to produce foam equipment, mixed with air to produce foam. Advantages: foam proportioning device is used to store foam extinguishing agent, through proportioner role in the fire water storage tank replacement foam extinguishing agent, and with the water by a certain percentage of the unit mix to form a foam mixture. Structural foam proportioning device can be classified according to both horizontal and vertical.