modest pressure-rated pump + Penductor = rediculous flow

[dolt]

jefathome - I would think that it would create some back pressure as the opening of the cone on the proximal end of the eductor is narrower in size than the tubing leading up to it but I do not think that it would be a huge effect

[dolt]

hmm - I was looking at their site - is there such a thing as one inch loc line? my return plumbing is one inch and the loc line looks pretty big - not sure what component of the loc line to measure to get the size

[Ewan]

I had to use a 1"-->3/4" reducer on mine. I use 1" plumbing too.

[dolt]

cool - I'll have to check it out - If I have 1" loc line (if it even exists) I will either have to locate parts for that or go down to 3/4 as you did

[Weatherman]

Originally posted by jefathome
]

1) Does it reduce the flow through your pump? My pump is 580GPH and I need to keep a minimum of 480GPH for my CHiller.

2) Is the flow it creates more (or less) narrow than with the regular flare nozzle? I've always heard that narrow fast flow (Laminar?) will stress your fish.

1) Eductors do reduce the flow through the pump. 7' to 10' of additional head is a reasonable estimate. For a pressure-rated pump, eductors may reduce the flow through the pump by about 25-30%. For non-pressure-rated pumps, eductors may reduce flow through the pump by 80-90% (making the addition of an eductor a bad choice).

2) The flow out of an eductor is a strong jet. Depending on how the eductor is designed, the jet may be narrow or broad, but it's not like the nice broad, gentle flow from a Tunze Stream.

[jefathome]

Originally posted by Weatherman
1) Eductors do reduce the flow through the pump. 7' to 10' of additional head is a reasonable estimate. For a pressure-rated pump, eductors may reduce the flow through the pump by about 25-30%. For non-pressure-rated pumps, eductors may reduce flow through the pump by 80-90% (making the addition of an eductor a bad choice).

2) The flow out of an eductor is a strong jet. Depending on how the eductor is designed, the jet may be narrow or broad, but it's not like the nice broad, gentle flow from a Tunze Stream.

I can't find a flow curve for the Panworld px50
Do you think that this would drop it below 480gph?
75% of 580gph = 435gph

[jefathome]

Originally posted by Ewan
I don't know how much it will reduce flow... sorry. Maybe the head loss calculator can help here. It does create more head pressure, but if you have a pressure rated pump, it should be up to the challenge

It's not comparable to the flare nozzle at all. In my system, it creates a very strong laminar flow. I aim it at the glass, toward the bottom of the tank. I used the flare nozzle myself (and I still do on my return outlet), and I always aimed them at the surface. You wouldn't want to do that with a penductor, or you'd have a wet ceiling.

I wouldn't use the words "gentle" or "dispersed" when describing the flow from the penductor in my system. I was surprised how narrow the cone of water was coming from the penductor.

-E.

Ah... Maybe I'll skip it then.
thanks for the feedback.

[dolt]

after looking at my tank when I got home it appears that the plumbing in the tank for the return lines is 3/4 but outside the tank it is one inch so I will be able to use the captive oceans stuff - cool - can't wait