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Horizontal expansion tank 50L (stainless steel) AQUATICA (779112) For the water supply system to operate in automatic mode, it is necessary to install a closed membrane-type expansion tank with a pneumatic accumulator of appropriate volume, because pressure switches can only work together with an expansion tank. An expansion tank is a device built into the water supply system to maintain the required pressure, ensuring the system is always ready to operate under stable pressure. Functions: Accumulation of water under constant pressure, allowing the pump to turn on not immediately when water is consumed from the water supply system, but only as the amount of liquid (pressure) in the expansion tank decreases; /li> Maintaining a reserve amount of water in the water supply system. Technical characteristics: Metal body made of stainless steel; Bolts and flange made of stainless steel; The membrane used in the expansion tank is made of synthetic ethylene-propylene rubber EPDM. Operating conditions: Maximum ambient temperature: +40ºС; Maximum temperature of accumulated liquid: +99ºС; Recommended pressure in the air cavity from 1.5 to 1.6 bar; Maximum pressure in the water supply system