Sanding device for a rail vehicle

The insert (102) has a housing (109) with a hollow space (111). An injection chamber (114) and a venturi pipe (115) are provided in the hollow space. A suction channel is provided in the housing, and connects storage container (101) with the injection chamber. The housing has another hollow space (117) that is arranged between a compressed air line (112) and a nozzle (113). A closed air channel (118) is provided between the two hollow spaces, and air channel input (119) and an air channel output (120) lies in the two hollow spaces. An independent claim is also included for a method for placing grit with a sand removal device.