EVALUATION OF SPRAY DISTRIBUTION FOR LOW PRESSURE EMTF NOZZLES

Abstract

The full automatic patternometer was used with ultrasonic sensor and compatible software program to measure the spray distribution from different EMTF nozzles under conditions of JKI laboratory in Germany. The goals of present study are measured spray distribution of the EMTF nozzles using the full automatic patternometer single nozzle test, by comparing the distribution profiles of sprays from EMTF nozzles those from standard fan nozzles. As well as investigating to find the optimum combination for EMTF nozzles from the available nozzles in the marketing which may be produced a good uniformity spray distribution. The current investigation research was cared out in the Federal Biological Research Centre for Agriculture and Forestry (JKI), Braunschweig, Germany. The full automatic patternometer was adapted at the optimum air conditions, 20° C air temperature and 80 % relative humidity. Eight external mixing twin fluid nozzles were evaluated in a patternometer single nozzle test to compare spray distribution. Each tip was compared at 60 kPa liquid pressure, parallel to a 150 kPa and 200 kPa air pressure for each. Two levels for nozzle height 50 cm and 70 cm, and co-angling 45° and 60° was treated and studied their effect with the interaction of both nozzles and air pressure on coefficient of variation percent. The results indicated that the minimum CV % values for good spray distribution were 10.6 %, 12.9 % and 14.0 % for EMTF nozzle N8, N3 and N7 at 50 cm nozzle height, 45° co-angling and 200 air pressure respectively. The EMTF nozzle N8 produced the CV % nearly the standard ISO nozzle CV percentages values. The uniformity spray distribution CV percent values for N8 (Lechler FT 5–608 & DG800-04 VK) nozzle at the optimum co-angling 45°were 11.0 % and 12.1% at 50 cm and 70 cm nozzle height respectively. As well as, there are non effects of the interaction of air pressures with the all factors on the CV percentage. It may therefore be concluded that the CV % values are more strongly dependant on the combinations of nozzles in the EMTF nozzles, which is highly significant in data.