Ddc pump

[ChrisZH]

Is a humming sound normal with ddc pumps? Or could it be air bubbles inside. I see that my distro block has air bubbles that are stuck in the main chamber right before the pump.

[jasonc_01]

DDC or D5 they both hum while running. The faster the speed the greater the hum.

[Knuxz]

Personally have noticed using both, DDC pumps tend to run louder than d5s. If I have the option I'll always choose a d5. Can't say for sure as I haven't seen every d5 on the market, but DDC tend to be more compact as well. Works great if there's clearance issues. Even if space is a limiting factor. 

[ChrisZH]

41 minutes ago, jasonc_01 said:

DDC or D5 they both hum while running. The faster the speed the greater the hum.

Well I got a replacement pump sent to me. The old one if I put it to 55% was silent. This one is always producing some form of a hum. The loop was just refilled yesterday but wasn't running much until now. That's why I'm wondering if it might be just some trapped air bubbles. Or maybe I just have the pump mounted too tightly? It's on a distroplate. This is a video of how it sounds. 

[ChrisZH]

39 minutes ago, Knuxz said:

Personally have noticed using both, DDC pumps tend to run louder than d5s. If I have the option I'll always choose a d5. Can't say for sure as I haven't seen every d5 on the market, but DDC tend to be more compact as well. Works great if there's clearance issues. Even if space is a limiting factor. 

Yea I know ddc is louder than D5. It could very well be that it's cause it's an open air case. This is a new pump, was not run dry at all. My last one if I put it at like 55% it was silent. So not too sure whats going on.

[jasonc_01]

sounds normal to me

[ChrisZH]

Just now, jasonc_01 said:

sounds normal to me

I find it weird that my "faulty" pump made no noise at around the same speed. But when it was at full load it was noisy as hell.

[ChrisZH]

43 minutes ago, jasonc_01 said:

sounds normal to me

Any idea why my old pump was silent but this one isn't? On another note my old one was 10w while this one says 15w.

[ChrisZH]

Is there a way I can get rid of the little bubbles that the pump is sucking in and possibly stuck on the impeller? 

[AngryBeaver]

On 3/9/2020 at 8:50 AM, ChrisZH said:

Is there a way I can get rid of the little bubbles that the pump is sucking in and possibly stuck on the impeller? 

Crank it to 100% for 10-20 seconds... drop to 40-50 for 20 seconds... do that for 5-10 minutes... then crank it to 100% and tip the case forward, back, left, right.  Thrn just let it run at 100% for a while and it should get the rest out over night 

[ChrisZH]

23 minutes ago, AngryBeaver said:

Crank it to 100% for 10-20 seconds... drop to 40-50 for 20 seconds... do that for 5-10 minutes... then crank it to 100% and tip the case forward, back, left, right.  Thrn just let it run at 100% for a while and it should get the rest out over night 

Did you hear the video, that sound is annoying and it's like that at 50% speed

[AngryBeaver]

Just now, ChrisZH said:

Did you hear the video, that sound is annoying and it's like that at 50% speed

It doesn't sound loud in the video. My response was to getting out the air. Ddc pumps in general are louder than d5s. You sacrifice sound and a setup that is cooled by the loop for more head pressure and smaller size.

[ChrisZH]

35 minutes ago, AngryBeaver said:

It doesn't sound loud in the video. My response was to getting out the air. Ddc pumps in general are louder than d5s. You sacrifice sound and a setup that is cooled by the loop for more head pressure and smaller size.

Yea I know this, just makes me scratch my head because the same brand pump I had before was silent at the same percentage speed.

[AngryBeaver]

42 minutes ago, ChrisZH said:

Yea I know this, just makes me scratch my head because the same brand pump I had before was silent at the same percentage speed.

They are still two different pumps and your other one was defective. So it might not have been spinning at the right rpm or even at all.

 

If you can't take the noise get a d5. Alternatively you can play with the speed. Certain speeds can cause resonance with other items in the machine that make it louder than it would be otherwise. So try increasing the speeds slowly and see if it quiets down.

[PowerBaller]

Slightly adjust the mounting position and pressure and see if the resonance are attenuated better

[Ltskitzo]

I use DDC pumps due to space restrictions. I find my DDC's make a lot more noise if they are in contact with things. Especially metal. They will make the metal they touch either vibrate at the same frequency OR rattle against it. Foam tape is usually my solution...