aquamist spray
Few questions Richard, how far back is the solenoid? That seems like alot of just "dribbling" meth coming out of the nozzles that the solenoid would stop. Also those nozzles are facing straight down where as most are facing straight up. How is the spray affected with the changing orientation of the nozzle using gravity to help stop the flow? It appears as though some of that low flow spray is just drainage. Before I set up my Labonte system I did the test mode on the pump which activates it at 50% with two nozzles in clear containers and I saw great atomization with none of that effect shown in the video so I'm just curious.
The nozzle is about 4 inches above the jet. (aquamist demo)
I am not sure which video you were referring to regarding the dribble. Dribble can be causes by the one of more of the following:
PPS system:
1. Pump running on
2. Long flexible hose between the pump and jet (use solid metal hose)
3. Without a anti-dribble inline vave. (only works at "full-off")
PWM-V system:
1. Long flexible hose between the valve and jet (solid metal hose)
Placing the jet point up only helps a little. Water has high surface tension and tends to stay inside the hose/tubing unless there is pressure behind it to push it out.
The dribble in the PPS video is mainly caused by the water pump motor running on. Rotation mass can only be stopped by a brake. I have not seen any PPS system come with a brake.
Using a solenoid to stop the dribble is only good if you want to stop injecting totally. But in a dynamic sitiuation where the spray is neither "fully-on" nor "fully-off", the running on effect cause havoc on fast load change. Basically it can't.
Frrom 50% onwards, your Labonte system has reached 70% of its total flow range, it will obviously give good atomisation. The video show the spray between 0-50%. If you want to replicate the video, turn your labonte system from 0% onwards and watch the spray.
I am not sure which video you were referring to regarding the dribble. Dribble can be causes by the one of more of the following:
PPS system:
1. Pump running on
2. Long flexible hose between the pump and jet (use solid metal hose)
3. Without a anti-dribble inline vave. (only works at "full-off")
PWM-V system:
1. Long flexible hose between the valve and jet (solid metal hose)
Placing the jet point up only helps a little. Water has high surface tension and tends to stay inside the hose/tubing unless there is pressure behind it to push it out.
The dribble in the PPS video is mainly caused by the water pump motor running on. Rotation mass can only be stopped by a brake. I have not seen any PPS system come with a brake.
Using a solenoid to stop the dribble is only good if you want to stop injecting totally. But in a dynamic sitiuation where the spray is neither "fully-on" nor "fully-off", the running on effect cause havoc on fast load change. Basically it can't.
Frrom 50% onwards, your Labonte system has reached 70% of its total flow range, it will obviously give good atomisation. The video show the spray between 0-50%. If you want to replicate the video, turn your labonte system from 0% onwards and watch the spray.
Last edited by Richard L; Feb 5, 2010 at 10:40 AM. Reason: typo

If you have time to measure the fluid for one minute and plot it at 1v increment, the result should match the above chart pretty accurately. At 2.5V(125psi), a PPS system would have reached 70% of its enitre flow range.
Last edited by Richard L; Feb 5, 2010 at 10:42 AM.





