12V High temp pump

maurice
Posts: 4
Joined: Tue Oct 09, 2012 5:47 pm

12V High temp pump

Postby maurice » Fri Jun 07, 2013 6:25 pm

The newer high temperature pump which operates at 12V http://www.lightobject.com/High-tempera ... -P711.aspx is listed as being able to tolerate a higher temperature. However only the non-submersed temperature is listed. What is the maximum submersed temperature?

Tech_Marco
Posts: 4328
Joined: Mon Jun 15, 2009 3:00 pm

Re: 12V High temp pump

Postby Tech_Marco » Fri Jun 07, 2013 10:01 pm

60'C is the max. A lot folks used it submersed in boiling watr and got it killed.

Marco

maurice
Posts: 4
Joined: Tue Oct 09, 2012 5:47 pm

Re: 12V High temp pump

Postby maurice » Sat Jul 20, 2013 5:03 pm

Thanks for the info. It would be great if you could offer a pump that was submersible to 90 C or so.

Tech_Marco
Posts: 4328
Joined: Mon Jun 15, 2009 3:00 pm

Re: 12V High temp pump

Postby Tech_Marco » Wed Jul 24, 2013 11:25 am

It is not quite possible because such high temp is going to kill the control board build inside of the pump.
I keep tell custom not to put the pump inside of boiling water but use it 'inline'. But most of those didn't pay attention and though that 90'C is for submersible. Ouch~~ you know what happen next.


Marco

maurice
Posts: 4
Joined: Tue Oct 09, 2012 5:47 pm

Re: 12V High temp pump

Postby maurice » Thu Jul 25, 2013 11:50 am

Actually I'm surprised it requires a control board. Would it be possible to design one with the board outside of the pump body? Of course the wiring would need to be different but I would think it could be done. This would really be killer for a sous vide application since priming every time is not the most practical, and the tubing required for inline could be a haven for bacteria if not dried properly.

Tech_Marco
Posts: 4328
Joined: Mon Jun 15, 2009 3:00 pm

Re: 12V High temp pump

Postby Tech_Marco » Thu Jul 25, 2013 1:44 pm

Yes, it is a brushless motor, but not the brush type so it must be driving in 'pulse' with high frequency. That's why brushless pump is always more expensive than brush type and more quiet. Remember that most electronics can substain up to 80'C only. Even military grade can go as high as 110'C or around.

In your case, you can install the pump outside of the water container but in lower position. That way, using gravity to drag water from the water containter to pass through the pump like 'self prime'. But doing so, you must drill a hole in the lower part of your water container and seal it with silicon glue. We call "inline" connection. Most folks are confusing when we tell them that our pump is submersble as they though that submerisble pump must submerse into water. No, it is not true for our pump. Our pump is both submersible and inline


Marco


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