Electrically actuated spray nozzles

The Electric HydroPulse nozzle has an integrated solenoid valve to rapidly regulate the on/off cycle of the nozzle.  The solenoid valve is positioned inside the nozzle so that it is very close to the orifice.  This means the reaction time of the shut-off system is incredibly fast.  The nozzle can be cycled on and off up to 150 times per second.

In addition to the electrically modulated spray nozzles, SNP can also supply the hardware and software for controlling the nozzles.  The FlexFlow control panel is an off-the-shelf box built for precision spray control.  Furthermore, we can design and build all the necessary spray manifolds to position the nozzles correctly.  When combined the Electric HydroPulse nozzles, the FlexFlow control panel and the spray manifolds represent a complete, precision spraying system.


Variable flows (pulse width modulation)

With such fast and reactive on/off cycle times the Electric HydroPulse can vary the flow from the nozzle without varying the fluid pressure.  This is achieved by pulsing the nozzle very rapidly, (pulse width modulation - PWM).  So, for example, a half flow could be achieved by having a 0.05 second on to 0.05 second off cycle time.  This would halve the overall flow rate at any given pressure.  Because the on/off cycle is so fast the resulting spray remains very evenly distributed even when targeting fast-moving conveyors.

With a normal hydraulic nozzle flow rates could only be controlled by varying the fluid pressure.  This, however, will alter other important spray characteristics such as droplet size.  When variable flow rates are required due to, say, different product lines, it might not be possible to achieve the required variance with a hydraulic nozzle.  This would mean a nozzle change between production runs.  The Electric HydroPulse will mean the same nozzles can be used despite variable dosing requirements.

Pluse width modulation spray control

Additionally, rapid pulse modulation allows for lower flow rates to be achieved when compared to traditional hydraulic nozzles.  This can be important in some very low flow rate applications.


  • Control a wide range of flow rates
  • Guarantee an even and uniform application rate that connects with conveyor line for automated speed adjustments
  • Reduce consumption of expensive coatings
  • Reduce overspray waste and improve product quality
  • Exact target coatings secure a clean and safe environment
  • Promote increased production
  • Reduce maintenance and downtime
  • Reliable spray dosing


  • Application of anti-microbial agents for food safety
  • Application of preservatives and mold inhibitors to help extend shelf life
  • Application of egg wash
  • Coat bottles to minimize scuff damage
  • Apply water to balance moisture loss from the freezing process
  • Apply coatings and release agents to pans, cookie sheets, and conveyors to prevent sticking
  • Apply flavourings, oil, and butter to enhance the appearance and improve the taste of


  • Apply viscous coatings like syrups, glazes, and chocolate



FlexF  Electrically actuated hygienic spray nozzle  Electrically actuated industrial spray nozzle

Electric Nozzles