Tieing uv's together?

[dawgface]

I plan on using (4-5) 25w UV's, my questions is how would I calculate the appropriate flow/dwell needed for this application? Let's say they recommend 100 gph per unit, could I or would I be safe to assume tied together they are capable of 400 gph?

 

[crew]

using straight math, I would assume that if you were to have them at 400gph, you would be making 4 UV's as effective as 1 would normally be. They recommend the 100gph because the water needs to be moving slow enough for the "bad stuff" to be killed. I imagine that the more you have in a system would have no effect on how fast your water should move through it.

 

[dawgface]

Well thats not entirely true, most larger system UV are just factory tied 40w together. I'm just unsure of how that overall effects performance.

 

[rbredding]

Crew;636749 wrote: using straight math, I would assume that if you were to have them at 400gph, you would be making 4 UV's as effective as 1 would normally be. They recommend the 100gph because the water needs to be moving slow enough for the "bad stuff" to be killed. I imagine that the more you have in a system would have no effect on how fast your water should move through it.

That's correct... when you increase the flow, you decrease the dwell time..
in your case, you'd be increasing the flow by 4, so you're dividing the dwell time by 4..

4/4 = 1 so the units could handle water faster, yet would yield the same effect on the water as 1 unit would at 100gph.. (since we're using that as a theoretical flow)


the relationship is linear..
It could vary slightly up or down from that, depending on the distance of the water from the light source, but generally speaking, it would be the same

 

[dawgface]

using straight math, I would assume that if you were to have them at 400gph, you would be making 4 UV's as effective as 1 would normally be. They recommend the 100gph because the water needs to be moving slow enough for the "bad stuff" to be killed. I imagine that the more you have in a system would have no effect on how fast your water should move through it.

This is the part I'm not sure I agree with, or at the very least I'm looking for clarification.

That's correct... when you increase the flow, you decrease the dwell time..
in your case, you'd be increasing the flow by 4, so you're dividing the dwell time by 4..

4/4 = 1 so the units could handle water faster, yet would yield the same effect on the water as 1 unit would at 100gph.. (since we're using that as a theoretical flow)


the relationship is linear..
It could vary slightly up or down from that, depending on the distance of the water from the light source, but generally speaking, it would be the same

Makes perfect sense!