Paper360 - July/August 2015 - (Page 20)
Steam Profiler Gets a New
Lease on Life
Retrofitting its steam profiler actuators helps a newsprint
producer ensure reliability and reduce maintenance costs.
The new STA-1015 is heat resistant, reliable and
can be fitted to different steam valves.
The profiler has 114 new actuators.
During the latter part of the 1990s,
the market for steam profilers was at its peak,
but many of those profilers are now starting
to show their age, with some actuators failing
at an accelerated rate. Tasowheel, a profiler
actuator manufacturer based in Tampere,
Finland, now offers a retrofit solution for those
aging profilers that extends service life and
reduces the cost of maintenance - at a cost
considerably lower than a complete rebuild
of older actuators.
A major European newsprint manufacturer
has already taken advantage of the retrofit.
Their steambox was installed in 1999 and
many of the actuators were failing regularly in
the high temperature environment. Replacing
them was a maintenance burden that occurred
every six months when the profiler was taken
out and overhauled.
Tasowheel proposed a solution in which
the old and now obsolete actuators would be
replaced in-situ with new bolt-on actuators
designed to perform reliably even in high
temperatures. The new STA-1015 actuators
featured a control card isolated from the heat,
Paper360º JULY/AUGUST 2015
and heat resistant components and motor coil
cables and bearings.
The STA-1015 was able to replace old model
electromechanical steambox actuator types
(EMA15, EMA1000 and STC900). The customer noted that the new actuators fitted perfectly with the same connections and even the
same gaskets as the old ones. To evaluate the
reliability, a test actuator was provided which
was fitted for an extended period, ensuring
that there were no control, compatibility or
reliability issues. There were no problems during the test period.
The mill placed an order for 114 new actuators, which were installed in September, 2014,
by three mill staff over two day shifts.
The customer reports that the replacement
cost was considerably less than alternative
solutions since no original-design replacement
actuators were available. Overhaul of the entire
old actuator set was possible, but would have
required considerable downtime, manpower
and lost production. The cost of the OEM service components would have been at least 20
percent more than the Tasowheel solution.
With the reliability problem solved, the
mill staff hopes to extend the steam profiler
overhaul cycle from the previous six months
to two years. This means lower maintenance
costs and a longer lifetime with better reliability for the profiler.
Mark Williamson is a journalist/engineer
who has written extensively about the
pulp and paper industry. Contact him at:
Original actuators (left) and new STA-1015 actuators (right).
Table of Contents for the Digital Edition of Paper360 - July/August 2015
Over the Wire
Root Cause Problem Elimination…or Only Analysis?
Steam Profiler Gets New Lease on Life
From Reactive to Proactive
TAPPI Journal Summaries
Kemira Expands its Global Business and Humanitarian Reach
PEERS Offers Opportunities for Optimization
Index of Advertisers
Paper360 - July/August 2015