A foam bladder tank is a crucial component in fire suppression systems that stores foam concentrate within an internal bladder and uses incoming water pressure to accurately mix the concentrate into the water stream. These reliable, low-maintenance systems are primarily used to combat fires involving flammable liquids. Bladder Tank Foam Proportioning System Foam Bladder Tanks, Bladder Tank Manufacturers, Horizontal ... How They Work Foam bladder tanks operate on a balanced pressure proportioning principle, requiring no external power supply other than a pressurized water source. Operation: When the fire protection system is activated, water flows into the steel pressure vessel but outside the internal elastomeric bladder. This incoming water pressure is transferred to the foam concentrate stored inside the bladder, forcing the concentrate out through a piping system to a proportioning device (ratio controller). Proportioning: The ratio controller meters the appropriate amount of foam concentrate into the main fire water line, creating a precise foam solution that is then piped to discharge devices like foam sprinklers or monitors to extinguish the fire. Separation: The bladder ensures the water and foam concentrate remain separate, which means the unused foam concentrate is not contaminated and can be used in future incidents, minimizing waste and maintaining the foam's integrity over long storage periods. Key Features & Specifications Foam bladder tanks are designed to be durable and reliable, with specific construction standards to ensure effectiveness in emergency situations. Construction: The main tank vessel is typically made of carbon steel or stainless steel, designed and constructed in accordance with standards like the ASME Code Section VIII Div 1 for unfired pressure vessels. The internal bladder is commonly made from nylon-reinforced Buna-N rubber. Mounting: They are available in both vertical and horizontal configurations to suit different space requirements. Capacity: Tank capacities can range widely, from around 140 liters to over 15, 000 liters (37 to 4000 US gallons). Pressure: Maximum working pressure is typically around 175 psi (12 bar). Certifications: Many high-quality foam bladder tanks carry third-party certifications such as UL Listed, FM Approved, and CE Mark, ensuring adherence to international safety and quality standards. Applications Foam bladder tanks are used in facilities where there is a risk of high-hazard fires, particularly those involving flammable liquids. Industrial Facilities: Refineries, tank farms, chemical warehouses, pump rooms, and DG set rooms. Aviation: Aircraft hangars and helipads. Transportation: Truck loading racks and marine/offshore applications. Other Uses: Beyond fire suppression, the precise proportioning capability of foam tanks can be adapted for high-efficiency dust suppression in mining, environmental remediation of spills, and specialized industrial cleaning