What I've been up to.

[psyshack]

Thought I would link you fine folks up to my latest cooling up date.

http://www.hardforum.com/showthread.php?p=1033856260#post1033856260

psy

[rainless]

Ha! I mounted my rad almost the exact same way:

http://i191.photobucket.com/albums/z89/inspectorbloor/IMG_5049.jpg

http://i191.photobucket.com/albums/z89/inspectorbloor/IMG_5052.jpg

(Course I decided to go ALL THE WAY with the screws... :) )

Nice job!

Did they make that pump? Which one did you get?

[teddythetwig]

Looks great, don't often see the pump mounted outside of the case but it definitely works in your setup.

[psyshack]

Looks great, don't often see the pump mounted outside of the case but it definitely works in your setup.

I have been very impressed with the pump. But it is about 40 years behind the times when it comes to the current closed impeller designs. The eye of the impeller is a beveled mated surface to the inlet of the volute. It should have a extended eye. The result of the pumps current design is one very bad thing. In higher head usage it can use up energy in leakage at the eye of the impeller and thus compress on its self. When this happens it recircs water back across the front of the impeller to the low suction area. Which is the eye of the impeller. Thus affecting over all preformance and not meeting it true potential on the pump curve.

The open eye design use to be a very common design element in B&G, Aroura, Paco, Taco, Deming, Goulds, Armstrong and other heavy hitters. They all in the last 20 years have left it to history. While I was impressed to see a closed impeller. It was disappointing to see what we call a open eye in the pump world.

[Spawn-Inc]

I have been very impressed with the pump. But it is about 40 years behind the times when it comes to the current closed impeller designs. The eye of the impeller is a beveled mated surface to the inlet of the volute. It should have a extended eye. The result of the pumps current design is one very bad thing. In higher head usage it can use up energy in leakage at the eye of the impeller and thus compress on its self. When this happens it recircs water back across the front of the impeller to the low suction area. Which is the eye of the impeller. Thus affecting over all preformance and not meeting it true potential on the pump curve.

The open eye design use to be a very common design element in B&G, Aroura, Paco, Taco, Deming, Goulds, Armstrong and other heavy hitters. They all in the last 20 years have left it to history. While I was impressed to see a closed impeller. It was disappointing to see what we call a open eye in the pump world.

are you talking about the yellow highlighted part?

could you shave or sand it down?

http://img16.imageshack.us/img16/2087/impe.jpg

[psyshack]

That hole you have circled is the eye of the impeller. Do not shave it! The eye, hub just inside the the eye and the entering vanes are the low psi area of the impeller. Other than than the open eye. The rest of the impeller is great! Its a real impeller really cool if you work with them every day. Be them plastic, bronze, SS, iron, steel or other matrials. They are very complex tp produce be them assembled or cast. The hydronic dynamics are insane. It all starts at the eye.

Look at this simple pic.

http://www.aces.edu/pubs/docs/A/ANR-0953/figure1.JPG

The impeller you want is the true closed impeller. That little snot on the eye of the impeller setting with in a mating area in the volute of the pump is the current state of engineering in a semi or closed loop system. The impeller you have in your pic is between the semi closed impeller and the true closed impeller of current design. While the open and semi open impellers have design guide line and conditions they meet very well given what is being pumped and design conditions. The open eye impeller is a cheap hack and very out dated in the pump world.

[Spawn-Inc]

ahh. the semi is like the impellers that i will work with once i find a place to work on my refrigeration.

its from a centrifugal compressor.

http://www.grc.nasa.gov/WWW/5810/facilities/CE18/CC3.jpg

[rainless]

And now... once again... You guys have gone WAAAAAAAY over my head. :)