Pulse Width Modulated (PWM) Flow Control from Spraying Systems Co.
Controlling flow rate by adjusting duty cycle and cycling frequency of an electric nozzle while maintaining a constant pressure provides distinct advantages over controlling flow by adjusting pressure.
- To increase the flow rate, you normally need to increase pressure, which can dramatically change the spray angle and drop size. PWM flow control provides an extremely wide range of flow rates from a single nozzle, maintaining a consistent spray angle and drop size without adjusting pressure.
- Electrically actuated nozzles can be controlled much more quickly and accurately than pneumatically actuated spray guns or standard hydraulic nozzles.
- PWM flow control can maintain low flows even with large spray orifices, reducing clogging.
- Generating low flows using larger orifices at lower pressures reduces or eliminates the misting that often results at higher pressures. The risk of worker inhalation of chemicals is reduced and overspray is minimized or eliminated.
Click here to read the complete technical manual or right-click on the link to download file (977 kb).