Sand stairway for a sand-spreading system of a rail vehicle, sand-spreading system and rail vehicle

A sand stairway for a sand-spreading system of a rail vehicle, the sand stairway comprising:

• a stairway housing with a sand compartment for providing progressively sliding spreading sand and with a blow-out duct for discharging spreading sand from the stairway housing;
• a nozzle flange disposed above said sand compartment and said blow-out duct, said nozzle flange being formed with a first receiving bore and a second receiving bore;
• a first nozzle for producing an air jet that is directed into said sand compartment for swirling up spreading sand, said first nozzle having a first nozzle insert produced separately from said stairway housing and releasably inserted into said first receiving bore;
• a second nozzle for producing an air jet that is directed into said blow-out duct for discharging swirled-up spreading sand, said second nozzle having a second nozzle insert produced separately from said stairway housing and releasably inserted into said second receiving bore;
• said nozzle inserts having nozzle diameters tailored to a type of spreading sand used in the sand-spreading system;
• said nozzle inserts being replaceable upon contamination;
• and
• said nozzle inserts selectively having mutually different nozzle diameters or identical nozzle diameters, in dependence on operating requirements.