Reference Manual

D351817X012 / MV80 / CD204 / October 2009
PULP & PAPER
SOLUTION
Fortunately for Kruger, engineers within the Fisher division of Emerson
Process Management had been studying the common aws of
traditional buttery valves and developing a new, far more reliable
design. Introduced this summer, the new Control-Disk
™
valve delivers
better adherence to set point and excellent throttling performance.
The Kruger mill was eager to conduct a eld trial on-site, which was
arranged and supported by the Fisher division’s Rotary Marketing team
and the local Emerson sales ofce, Laurentide Controls.
The mill installed two Control-Disk valves to replace two ten-inch gate
valves. One valve measures level control on a rener pulp tank, Line 5.
The other improved a vacuum loop on the paper machine.
Pierre explained that Lines 1 and 2 have smaller reners, but the
process is similar to that used on Lines 3, 4, and 5. “We installed a new
6-inch segmented-ball valve to control the level of the latency chest,”
he said. “Then, we compared its performance to the Control-Disk valve
installed on Line 5 — and we were very pleased with the results.”
The Fisher-patented Control-Disk valve offers the wide control range
of a segmented ball with a true Equal Percentage Characteristic.
The Control-Disk valves were installed with the same face-to-face
dimensions, provided equal or better control performance than the
segmented ball, and avoided all the chronic maintenance issues of the
gate valves they replaced.
RESULT
Using historical trend data for the level, ow, and valve opening,
Pierre compared valve performance before and after the change.
The Control-Disk valves saved the Kruger mill about $3000/valve in
“avoided” maintenance costs and reduced variability by a factor of
three. Capital and maintenance costs for the installation were minimal,
and downtime due to piping changes was eliminated because the
valves met existing, face-to-face dimensions.
© Fisher Controls International LLC 2009 All Rights Reserved.
Fisher and Control-Disk are marks owned by one of the companies in the Emerson Process Management business division of Emerson Electric Co. Emerson
Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their
respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy they are not
to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales
are governed by our terms and 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 Emerson, Emerson Process Management, nor any of their afliated entities assumes responsibility for the
selection, use or maintenance of any product. Responsibility for 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
“The Control-Disk valves have
reduced variability, maintenance,
and downtime. But, better than
that, the PQM analyzer has not
missed any samples, and that was
our primary goal. The increased
stability and reliability, based on
improved valve performance, will
lead to better quality of our end-
product.”
Pierre Gauthier, Instrumentation Supervisor
Kruger Inc.