Electric gate/ball valve

[Spinner]

Hello,

I will have two pumps running 4 - 1" inlets on the close loop part of my build. I want to run two Water Blasters 16000 pumps 8600gph into a electric 2 way valve. Could anyone give some information good or bad on this not really wanting to run 2 4way's OM.


Thank You,:music:

 

[Peppie]

Wouldnt you need 2 ball valves? One for each pump?

 

[Spinner]

Hi,

I have (2) 2" overflows that are tied in together feeding each pump(see pic). Then i wanted to tie both pumps into one manifold into ball valve.

Plumbing your pumps this way allows for double the flow with 1x friction. Have never used a electric valve not sure it can handel the flow?

Thank You,

 

[Peppie]

Goggle Hayward Motorized Ballvalves
I am pretty sure the have the unit that will handle that flow rate. I think the cost was about $350

 

[dnjan]

Hi,

I have (2) 2" overflows that are tied in together feeding each pump(see pic). Then i wanted to tie both pumps into one manifold into ball valve.

Plumbing your pumps this way allows for double the flow with 1x friction. Thank You,

Could you provide more detail on how the outputs from the two pumps will be tied together?
I am having trouble picturing this.

 

[mojoreef]

Yea I cant get my head around it either. Couple of quick points, if you are feeding the pumps from an overflow its not a closed loop and you will have issues. Also two 8600gph pumps is a lot of water flow. Normally when you build a closed loop you take water directly form the tank via a bulkhead and then feed the pump and return it, if you wanted to run a motorized ballvalve you would come out to the pump and into a motorized 3 way ball valve with manifold on either side of it. I will dig up a picture of mine.

mojo

 

[Spinner]

Thank you mojoreef that's just what i am needing information on. My discription was not very good........my bad
I have two 2" close loop pump feeds one on both ends of tank(see pic) They are connected together under tank where pumps will be. Both close loop pumps will pull off this(see pic of blue tees and sight tube) then both pumps are hooked together using one manifold with eight 1" outlets. I was wanting to hook 3 way like your to center of manifold so it would feed four inlets at a time.

 

[dnjan]

Still can't tell how everything will feed together - a schematic would be nice.

BUT - putting both pumps together will increase velocity in the output line.
Headloss for laminar flow is related to velocity. So putting both pumps together into a single output line will increase headloss (wasted pump power).

Note - if velocity for a given pipe diameter gets too high, headloss is related to velocity-squared. A real waste of pump power!

Please provide a schematic, including pipe diameters.

 

[Spinner]

Hi Jnjan,

I will dry fit it together in the morning and post a pic. I know with 1 1/2" pipe i will be over the 5 feet per second that causes wear on pipes and adds sound. So my thought is to provide a blow off inlet for each pump side to also bring down psi/friction loss. This is something new i am trying and welcome all input so i will post pictures and adjust as needed. It may not work and i will have to use two valves on two manifolds but for me it's worth trying and learning

 

[Spinner]

Hello,

Here's the dry fit feeds for the two pumps * sight glass between pump inlets was removed as not to scratch. Will work on dry fit pump manifolds next.

 

[dnjan]

It is probably incredibly clear to you what you have pictured in your mind, but a schematic would help me a lot to visualize what you are doing.
Hand-sketch is fine. Label pipe sizes, pumps, flow direction.

Right now, all I can tell for sure is that you will have a huge amount of headloss at those T's (I assume that is where you are connecting the pumps).
The sharp elbos won't help much either.

 

[Spinner]

It is probably incredibly clear to you what you have pictured in your mind, but a schematic would help me a lot to visualize what you are doing.
Hand-sketch is fine. Label pipe sizes, pumps, flow direction.

Right now, all I can tell for sure is that you will have a huge amount of headloss at those T's (I assume that is where you are connecting the pumps).
The sharp elbos won't help much either.

Hello dnjan,

The only thing that's clear to me is my idea will not work with using a single manifold and two pumps using a gate valve. So i am kinda regrouping/thinking at this time what i am gonna do

Not sure what your thinking is with pump feeds getting head loss as they each have a 2" overflow/inlet to pull from that will always be full of water?

Thanks

 

[dnjan]

By head loss, I meant that you waste a lot of pump capacity with a sharp, 90-degree bend like that.

I think Mike already mentioned that feeding a closed-loop with an air-vented inlet (overflow) was not a good idea. It is too easy to suck air in, which will cause both noise and tank-bubbles. Better to put your intake below the water surface so it can never suck air.