NaanDanJain micro-sprinklers should be installed and operated according to the recommendations in the relevant catalogs. Find the filtration requirements for your specific product in the NDJ catalog or NDJ web catalog
NaanDanJain products should operate for a long period of time. However, with time, lime deposits
might occur. This document will guide you on how to remove it.
FLOW RATE CHECK
Once a year, perform a random check of a few micro- sprinklers at the recommended working pressures, and compare the actual flow rate in the field to the values that appear in the catalog, including the permitted tolerance.
Non-regulated micro sprinklers:
2.1 Open the micro-sprinkler to verify that the disk is in place and positioned freely. Clean the disk
and wash the area, and then perform another flow rate check.
2.2 If the flow rate remains higher than the permitted maximal rate, it may indicate a
decrease in the quality of the disk, which must then be replaced.
CLEANING INSTRUCTIONS FOR REMOVING LIME DEPOSITS SAFETY MEASURES:
Only use acid-resistant containers for the cleaning process. Use adequate body protection in order to prevent any direct contact with the acid solution. Purchase the acid only from official suppliers. Use the acid according to their official MSDS (material safety data sheet). Tapered connection must be unassembled before the acid cleaning treatment.
The cleaning solution is water, diluted with hydrochloric acid (HCI). Note that the acid should be poured into the water.
Hydrochloric acid at 32 % concentration Recommended treatment concentration: 0.2%
Concentration of the solution: (0.2:32) x 1000 = 6.25 This means that 6.25 milliliters of acid are diluted in 1
liter of water.
The micro-sprinklers/foggers should be immersed in the solution for 3 hours and then properly washed with water. The process can be repeated up to 4 times (a maximum of 12 hours) if the first cleaning cycle did not clean the sprinklers perfectly.
You can damage the micro-sprinklers with a high concentration of acid. Make sure to follow the
instructions exactly, or first try on small number of micro-sprinklers.