11L Air Reservoir Stainless Steel for Railway Air Brake Tank Product Overview The 11L air reservoir , also known as 11L air receiver tank or 11L air tank , is a professional pressure vessel specially designed for railway freight car air brake systems, perfectly matched with the 120 distribution valve brake loop. Manufactured in strict accordance with the TB/T 1900-2016 Railway Vehicle Air Cylinder standard, this air tank serves as the core pressure control component of