Brochure

WITHSTANDING VIBRATION
High vibration from process plant operation can shorten
equipment service life, damage critical components, and
cause deterioration or total loss of control.
Fisher control valves are designed and tested for robustness
in high vibration applications. Emerson engineers qualify
products to industry vibration standards and beyond. For
instance, Fisher products are subjected to additional testing
for millions of cycles at their resonant (worst case) frequency
to assure performance in your process plant.
Fisher products, by design, are enhanced to improve
vibration robustness. Wear points are eliminated in
instrumentation with linkage-less, non-contact position
feedback. Integral mountings make brackets and external
tubing obsolete.
MODERNIZING UNITS
Halting production and turning off profits in order to
modernize process units is not economically feasible.
A hot cutover allows plants to switch to digital without
taking the process down. The ability of FIELDVUE digital
valve controllers to function in two operating modes,
pressure and travel, has multiple benefits for hot cutovers.
Digital valve controllers have a unique pressure control
capability which keeps control valves at set point as you
switch to digital instrumentation.
Personnel can locate the FIELDVUE instrument on the control
valve, make a fieldbus connection, and configure it to the
pressure control mode to perform as a fieldbus-to-pressure
transducer, providing input to the existing pneumatic
positioner. Then, when the control room is ready, the digital
valve controller can be easily switched to travel control,
replacing the pneumatic positioner.
Fisher
®
Technology Development | 7