cooling operation

[C12carbon]

Hello everyone,
I'm making a bubble valve for foundry on the ground and I'm calculating the thermal module for directional solidification (which is far from directional). I now have zones that have a thermal module about 2 times compared to the others and since I can't lighten them from the supermetal, due to machine tools necessary, I would have opted for the use of coolers. However I do not know how they work, or better than lowering the thermal module? are better external or internal (so can I break them when I go to work the piece)? and above all, not to neglect, how much do they cost? do catalogues exist? Can I fix it differently?
Thank you in advance for the answers.
cordial greetings
C

 

[meccanicamg]

http://www.vortexitalia.com/categories.php/tubi+raffreddatorihere are examples and applications. make an offer request for prices.

internal or external? are tube trunks. There are no valves. If you want to put something...you have to change the products and apply them in a finished volume around the valve...but it makes little sense.

 

[C12carbon]

Thank you.