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- since 1996 -

Ultrasonic Sciences Ltd
We specialize in the design and manufacture of automated and semi-automated ultrasonic testing systems, including multi axis, multi channels systems and phased array electronics.

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Technical Discussions
Mohammed Shafie
Mohammed Shafie
01:48 Jan-28-2000
Degassing Water

Dear Sir/Madam,
I was wondering if anyone can provide me with information
on ways to degass water. thank you
Cheers

Mohammed Shafie
McGill University
Civil Engineering Department
tel.: (514) 398-8313
fax: (514) 398-7361


    
 
 Reply 
 
Robert (Rocky) A. Day
Engineering
Milky Way Jewels, USA, Joined Nov 1998, 40

Robert (Rocky) A. Day

Engineering
Milky Way Jewels,
USA,
Joined Nov 1998
40
01:17 Jan-29-2000
Re: Degassing Water



    
 
 Reply 
 
John Rutter
John Rutter
01:45 Jan-29-2000
Re: Degassing Water
Heating (see Rocky's post) or allowing to stand for several days helps get rid of the excess air dissolved in cold tap water.

Alternately, Sonotech sells a wetting agent specifically for accelerating the offgassing of water in immersion tanks. The product name is Echowet. FWIW, it also helps couple the water to dirty or oily parts, allowing better acoustic coupling as a result.


Good luck,
John



    
 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1261

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1261
03:17 Jan-29-2000
Re: Degassing Water
I used to work in a facility where we used a fair bit of degassed water.
I recall filling a steel tank about 30cm diameter holding about 100 litres.
This had a flat Perspex top that fit over the top after filling (a gasket and clamps secured the Perspex that was about 3cm thick).
A Tee fitting was drilled through the Perspex and we had a water hose affixed to either side of straight branch of the Tee.
Water passed through the Tee and the Venturi effect pulled a good vacuum.
We would watch the water surface through the Perspex until the bubbles stopped and a reasonable degassing was achieved.

Ed


: Dear Sir/Madam,
: I was wondering if anyone can provide me with information
: on ways to degass water. thank you
: Cheers

: Mohammed Shafie
: McGill University
: Civil Engineering Department
: tel.: (514) 398-8313
: fax: (514) 398-7361




    
 
 Reply 
 
Wieslaw Bicz
Wieslaw Bicz
06:48 Jan-29-2000
Re: Degassing Water
: Dear Sir/Madam,
: I was wondering if anyone can provide me with information
: on ways to degass water. thank you
: Cheers

There is also the possibility to use ultrasonic waves with enough power to cause cavitation.
This works very quickly and very good (not only with water, but also with even very viscous fluids).

Wieslaw Bicz

http://www.optel.com.pl


    
 
 Reply 
 

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