International standard for mixer performance
April 1st 2008 Traditional industry-wide
specifications for submersible
mixers have been based on power
input per volume, and
do not take any other
important factors
such as propeller
efficiency and
hydraulic results into
account.This has
meant problems for
customers trying to compare and
measure performance.
Now a brand new ISO
international standard for mixer
performance has been devised by
ITT Water & Wastewater in
collaboration with industry experts.
ISO 21630 was adopted last
August. It means customers can
now "calculate and specify the
traction thrust required to provide
adequate mixing, instead of
specifying Watt per m3 which is
more an indicator of mixer size,"
says Lars Urby, head of applications
and member of ISO working group.
Group chair Magnus Fahlgren
added that the standard is an
enormous advance,"The fact is,
there hasn't been a standard at all.
That's made it a bit difficult to
compare mixers, to say the least".
ITT Water & Wastewater has
more than 100 000 mixers installed
in 140 countries, and has aimed to
be a driving force in the need for a
performance standard. More articles from I T T Flygt Ltd: | 
