Pulse Width Modulation (PWM) Flow Control

PWM flow control involves switching electrically-actuated PulsaJet® spray nozzles on and off very quickly using an AutoJet® spray controller. For a duty cycle of 50%, the nozzle sprays half the time and the flow will be 50% of the flow rate for that nozzle at a given pressure. This cycling takes place so quickly that the flow often appears to be constant and the coverage remains reasonably uniform.

This provides many benefits
  • Flow rate can be changed almost instantaneously
  • Extremely high flow turndown ratios can be achieved at a single pressure
  • Drop size and spray angle remain constant
  • Coverage is more consistent and uniform over a wide range of flow rates
  • Relatively low flow rates can be generated without clogging enabling hydraulic PulsaJet nozzles to replace air atomizing nozzles in many applications
  • Misting is minimized
  • Chemical consumption can be reduced

Pulse Width Modulation


Video Demo

Lubrication Systems
Components
Wire Lubrication
Chain Lubrication