Reference Manual

D351829X012 / MW21 / H: / March 2010
METALS & MINING
© Fisher Controls International LLC 2010 All Rights Reserved.
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conditions, which are available upon request. We reserve the right to modify or improve the designs or specications of such products at any time without notice. Neither
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proper selection, use, and maintenance of any product remains solely with the purchaser and end-user.
NORTH AMERICA
Emerson Process Management
Marshalltown, Iowa 50158 USA
T 1 [phone]
F 1 [phone]
www.EmersonProcess.com/Fisher
LATIN AMERICA
Emerson Process Management
Sorocaba, Sao Paulo 18087 Brazil
T +(55)(15)238-3788
F +(55)(15)228-3300
www.EmersonProcess.com/Fisher
EUROPE
Emerson Process Management
Cernay 68700 France
T +(33) (0)3 89 37 64 00
F +(33) (0)3 89 37 65 18
www.EmersonProcess.com/Fisher
MIDDLE EAST & AFRICA
Emerson FZE
Dubai, United Arab Emirates
T [phone]
F [phone]
www.EmersonProcess.com/Fisher
ASIA PACIFIC
Emerson Process Management
Singapore 128461 Singapore
T +(65) 6777 8211
T +(65) 6777 0947
www.EmersonProcess.com/Fisher
Emerson suggested a Control-Disk
™
buttery valve, which would provide throttling
control and meet the existing face-to-face dimensions. A FIELDVUE
™
DVC6020
instrument with Advanced Diagnostic (AD tier) capabilities would monitor the
valve’s performance.
When the performance data provided by the Fisher-Rotary team sounded too
good to be true, mill managers decided to test of new valve for themselves.
They replaced one of the nine Jamesbury valves in the line with a Control-Disk
and conducted side-by- side comparison tests. (They turned a pump on, opened
each valve in 5% increments, and charted the results.) Their data, point by point,
replicated that supplied by the Fisher factory team. The Control-Disk valve was less
expensive and worked as well or better than either the Jamesbury or the Vee-Ball
™
.
RESULT
The mill’s rst Control-Disk valve shipped to the site on time in August 2009 and
was installed the second week of October. By avoiding costly piping changes,
it paid for itself right “out of the box.” It provided throttling control based on
temperature and helped the mill reduce both its water usage and the amount of
steel wasted or “blanched” by too much water.
In November 2009, Severstal ordered four more, eight-inch Control-Disk valves
with 1052 actuators and FIELDVUE DVC6020 positioners. The balance of the
units (making a total of nine) were ordered in January 2010 and will replace the
remaining Jamesbury valves in the line. Five have been installed to date.
Using Fisher digital valves throughout the process is expected to reduce the mill’s
water usage by up to 50% and may, eventually, enable them to eliminate one
pump—a projected, long-term benet that could save the mill about $1M per year
or more.
Jamesbury valve
— BEFORE
Fisher Control Disk valve
— AFTER