In general, when the nozzles are operated with pulse width modulation systems, they always enter in the next lower drift reduction class.
The next lower class for Lechler nozzles are 90%, 75%, 50% or 0% while the use regulations/pressure remain the same.
If the PWM system is not used (switched off or duty cycle set to 100%), the registration for nozzles without a PWM system apply.
Using the example of IDKT 120-06 POM and IDTA 120-05C, the drift classifications are as follows:
|Use regulation||Operation||Drift reduction class|
|IDKT 120-06 POM||1 bar||Normal operation|
|IDTA 120-05C||1 – 1.5 bar||Normal operation|
Lechler PRE, IDTA and IDK 90 nozzles operated with PWM under same use regulations switch from 95% to 90% drift reduction class.Overview