Brochure

Performance Proven in
Field Tests

Two troublesome valves on a
paper machine were replaced with
Control-Disk valves.
 Existing valves could not be put
into automatic operation.
 Existing valves had gains
greater than 4.0 with process
variability of 3.5% for one and
8.0% for the other.
 Replacement Control-Disk
valves were installed and put on
automatic control.
 Variability was reduced from
8.0% to 3.0% for one valve and
from 3.5% to 1.6 % for
the other.

In another field test, two
conventional butterfly valves
controlling cooling water to
condensers were causing costly
trips of the safety system. Maximum
dynamic error was 21%.
 The Control-Disk valves greatly
reduced safety plant trips.
Dynamic error was reduced to
2% and deadband was reduced
to 0.25%