A two-axle 220S Ucs tank railcar is designed for transport of powdered materials with bulk density of 0.6-1.4 t/m3 (e.g. cement, lime, blast-furnace ash). It is equipped with two tanks with total capacity of 25.6 m3 (2 x 12.8 m3). The railcar is loaded by means of gravity via charge manholes located on top of each tank and unloaded pneumatically at maximum working pressure of 0.25 MPa. The railcar unloading system is designed so to allow for unloading of each tank individually or all of them at once.