Serial Pumps

[DaveKerk]

Hello!!

 

I am building a system with pumps in serial operation, they are both variable speed pumps and I was wondering if I should be careful about the speeds they are both at. One pump feeds directly into the other. Should I worry about the first pump feeding too slowly for the other one to get water and therefore run dry? Should they just run at the same speed if not slightly different? Any help is appreciated.

 

Thanks!!!

[NinjaJc01]

4 minutes ago, DaveKerk said:

Hello!!

 

I am building a system with pumps in serial operation, they are both variable speed pumps and I was wondering if I should be careful about the speeds they are both at. One pump feeds directly into the other. Should I worry about the first pump feeding too slowly for the other one to get water and therefore run dry? Should they just run at the same speed if not slightly different? Any help is appreciated.

 

Thanks!!!

Why do you need 2 pumps in one loop? It has no effect on performance.

[W-L]

6 minutes ago, DaveKerk said:

Hello!!

I am building a system with pumps in serial operation, they are both variable speed pumps and I was wondering if I should be careful about the speeds they are both at. One pump feeds directly into the other. Should I worry about the first pump feeding too slowly for the other one to get water and therefore run dry? Should they just run at the same speed if not slightly different? Any help is appreciated.

Thanks!!!

It would be best to have both pumps at the same speed but as mentioned in generally one pump like a D5 is good for a loop unless you have an exceeding long runs or lots of blocks. 

[DaveKerk]

1 hour ago, NinjaJc01 said:

Why do you need 2 pumps in one loop? It has no effect on performance.

 

1 hour ago, W-L said:

It would be best to have both pumps at the same speed but as mentioned in generally one pump like a D5 is good for a loop unless you have an exceeding long runs or lots of blocks. 

I have quite a long loop, one which that the max head of a single pump (a Koolance PMP-450) isn't sufficient. I have 3 Rads (120,240,360) and 4 Water Blocks (CPU,GPU,GPU, and a built in motherboard block). A little overkill I know but it is what the client wanted... overkill.

[NinjaJc01]

5 minutes ago, DaveKerk said:

 

I have quite a long loop, one which that the max head of a single pump (a Koolance PMP-450) isn't sufficient. I have 3 Rads (120,240,360) and 4 Water Blocks (CPU,GPU,GPU, and a built in motherboard block). A little overkill I know but it is what the client wanted... overkill.

Then just run the pumps at the same speed or get a better pump. 

[DaveKerk]

1 minute ago, NinjaJc01 said:

Then just run the pumps at the same speed or get a better pump. 

Alright, thanks all! I got the second pump in the mail today so gonna install it today.

[NinjaJc01]

1 minute ago, DaveKerk said:

Alright, thanks all! I got the second pump in the mail today so gonna install it today.

Run them via a splitter or something. Bear in mind, according to koolance, you can run them at 24V.

[W-L]

11 minutes ago, DaveKerk said:

I have quite a long loop, one which that the max head of a single pump (a Koolance PMP-450) isn't sufficient. I have 3 Rads (120,240,360) and 4 Water Blocks (CPU,GPU,GPU, and a built in motherboard block). A little overkill I know but it is what the client wanted... overkill.

OK that will add quite a lot of restriction especially with the number of blocks, so doing serial pump either right beside each other or at different points within the loop wouldn't necessarily be a bad idea, including redundancy.

[NickFromSweden]

Could you run two separate loops - one CPU + mobo and the other to handle the two GPUs?

[DaveKerk]

1 minute ago, NickFromSweden said:

Could you run two separate loops - one CPU + mobo and the other to handle the two GPUs?

I could but the case is already kind of packed and I don't think the client would like so many tubes.

3 minutes ago, W-L said:

OK that will add quite a lot of restriction especially with the number of blocks, so doing serial pump either right beside each other or at different points within the loop wouldn't necessarily be a bad idea, including redundancy.

I have the RP 452X2 so the pumps will be right next to each other.

8 minutes ago, NinjaJc01 said:

Run them via a splitter or something. Bear in mind, according to koolance, you can run them at 24V.

Doesn't the variable speed handle the Voltage?

[NinjaJc01]

3 minutes ago, DaveKerk said:

I could but the case is already kind of packed and I don't think the client would like so many tubes.

I have the RP 452X2 so the pumps will be right next to each other.

Doesn't the variable speed handle the Voltage?

What variable speed thing?

[DaveKerk]

1 minute ago, NinjaJc01 said:

What variable speed thing?

The PMP-450 has a variable speed knob. If I remember correctly, it handles 3-35 V.

[W-L]

2 minutes ago, DaveKerk said:

I could but the case is already kind of packed and I don't think the client would like so many tubes.

I have the RP 452X2 so the pumps will be right next to each other.

Doesn't the variable speed handle the Voltage?

That would work well, usually though I usually don't recommend bay res units since they tend to readily transfer vibration to the case and potentially making more noise. 

[DaveKerk]

1 minute ago, DaveKerk said:

The PMP-450 has a variable speed knob. If I remember correctly, it handles 3-35 V.

My mistake, 8-24V.

[NinjaJc01]

2 minutes ago, DaveKerk said:

The PMP-450 has a variable speed knob. If I remember correctly, it handles 3-35 V.

Not if you're only putting in 12V it doesn't... Molex is 12V, 5V and 2 Grounds.

EDIT: Even with the updated voltages, my information is still right.

[DaveKerk]

2 minutes ago, W-L said:

That would work well, usually though I usually don't recommend bay res units since they tend to readily transfer vibration to the case and potentially making more noise. 

I will keep that in mind and attempt to provide vibration reduction.

 

2 minutes ago, NinjaJc01 said:

Not if you're only putting in 12V it doesn't... Molex is 12V, 5V and 2 Grounds.

EDIT: Even with the updated voltages, my information is still right.

So I am a little confused. Do you mean provide two molexes to a single pump?

[NinjaJc01]

2 minutes ago, DaveKerk said:

I will keep that in mind and attempt to provide vibration reduction.

 

So I am a little confused. Do you mean provide two molexes to a single pump?

You would have to in order to run the pumps at 24V, however 12V should be fine.

[0ld_Chicken]

1 hour ago, DaveKerk said:

I will keep that in mind and attempt to provide vibration reduction.

 

So I am a little confused. Do you mean provide two molexes to a single pump?

you would use something like these below to step up to 24v, either of these will only handle one pump though

http://koolance.com/pump-or-fan-speed-controller-ctr-spd1224m

http://koolance.com/ctr-cd1224-pump-and-fan-controller-with-display

 

You shouldn't need to worry about that though, things would get very noisy anyhow.  Keeping them at the same speed (according to the dial or RPM) will do just fine   although koolance does like to make their rads restrictive (if thats what you're using)

[DaveKerk]

Thank you everyone! I will take all of your advice into consideration into future builds. The two pumps are working perfect so far.