The 573 Series Sand Trap with Rotary Shut-Off is designed to provide uniform sanding to enhance locomotive traction. It has an adjusting nut and nozzle combination that increases or decreases the amount of sand delivered to the point of contact between the rail and wheel interface. The integral Shut-Off permits the sand trap and controller to be removed without draining all the sand from the sandbox. The T-handle wrench provided in the quick flange allows the sanding hose to be disconnected with ease as well. Air passage is unrestricted, as there are no orifices to clog. Full throat opening for sand flow and a large opening of 1 1/2" for removal of foreign or large objects. Fixed delivery traps are available upon request. This preset feature can prevent costly sand waste.