First, it has to be tough enough to last through possible neglect from its owners. UL Listed and manufactured in accordance with the ASME code Section VIII, Div.Before a fire sprinkler system in a house can help protect its occupants from a fire, it has to survive at least two difficult obstacles.Protects antifreeze sprinkler systems from damaging effects of thermal expansion.The National Fire Protection Association (NFPA 13) requires the use of expansion chambers in antifreeze systems which use backflow preventors.Ī Young Engineering UL Listed bladder expansion tank is designed to protect a building’s anti-freeze sprinkler system from the damaging effects of thermal expansion.Īll Young Engineering’s products can be designed and manufactured to fit your exacting specifications Features of Bladder Expansion Tanks (BET) If left unprotected, a building’s sprinkler system can be susceptible to extreme pressure in the pipes, fittings and sprinklers themselves reducing the useful life of these parts. ( For a visual explanation, view our bladder expansion tank movie). When the fluid contracts due to temperature cooling, the bladder expansion tank expels the fluid back into the system. This over-pressurization can be alleviated with a Young Engineering UL Listed bladder expansion tank which “absorbs” the expanding fluid, thereby controlling the pressure to a safe level. Systems that utilize backflow preventors can suffer from over-pressure when temperature variation (excessive heat or cold) causes the antifreeze within the building’s fire sprinkler lines to expand resulting in sprinkler system damage.
A Bladder Expansion Tank (also referred to as Thermal Expansion Tank, Glycol Tank, or Sprinkler Tank) is designed with a gas-filled bladder inside to act as a shock absorber to liquid expanding within a building’s fire closed loop sprinkler system.
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