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 vibration applications. Emerson engineers qualify
products to industry vibration standards and then go
farther. 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 Fisher
instrumentation with linkage-less, non-contact position
feedback. Integral mountings make brackets and external
tubing obsolete.
MODERNIZING UNITS
Stopping 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 Fisher digital valve
controllers to function in two operating modes, pressure
and travel, has multiple benefits for hot cutovers. Fisher
digital valve controllers’ unique pressure control capability
keeps control valves at set point as you switch to digital
instrumentation.
Personnel can locate the digital valve controller 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
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