NOZZLE WEAR RATES AND TEST PROCEDURE

Abstract

ABSTRACT The wear rates of fan spray tips were determined. Both nominal capacity and construction material greatly influenced wear rates of the tips. Equations were developed for relationships between usage times and changes in flow rates through the tips. The percentage increase in flow rates for all brass, nylon, and stainless steel tips varied approximately with square root of time of use. Test results indicated that hours of use before 10% increase in flow rate increased rapidly with increased capacities of brass, stainless steel, nylon, and plastic tips. For all capacities tested, stainless steel tips were used an average of 5.6 and 2.1 times longer than brass and nylon tips, respectively, before flow rates through the tips increased ten percent. To reduce large variations in nozzle wear test results, a standard method for measuring nozzle wear rates was developed.