Versatile FLT93 stainless steel switches for harsh applications

AMS Instrumentation and Calibration introduces a new range of switches
from Fluid Components International (FCI) designed specifically to withstand
harsh environment applications.

Recommended for use in marine vessels, offshore platforms, refineries,
terminals, tank storage and chemical plants, the robust SIL-2 rated FLT93
Series switch features a no-moving parts flow/level sensor housed in a
stainless steel package and NEMA 4X enclosure, ready for punishing work
involving heavy marine seawater, acidic or alkaline fluids, corrosive exposure
and washdown cycles encountered in a wide range of industrial processes and
plant environments.

Key features of the field-proven FLT93 switches include air/gas flow or
point level measurement provided on exposure to seawater, salty air, harsh
process fluids and heavy washdowns; flow/level sensors in stainless steel,
Hastelloy or other exotic metals for demanding service environments; and choice
of insertion or inline mounting, faster response or high flow rate capabilities,
and optional sanitary service.

The continuous exposure of ordinary flow/level switches to corrosive seawater
and air is an issue aboard offshore oil/gas platforms and large floating,
production, storage and offloading (FPSO) vessels as well as other types of
marine cargo and passenger ships.

The FLT93 switch with its stainless steel construction and NEMA 4X
rating performs highly dependable flare gas and safety relieve valve leakage
measurement as well as many other tasks including vessel boiler air flow
monitoring and HVAC leak detection.

In oil/gas refineries as well as many chemical plants, flow/level
instruments are exposed to a wide range of harsh catalysts, solvents and other
corrosive fluids including dirty methane and hydrogen sulphide gases that over
time can affect measurement accuracy in less robust instruments. The rugged
design of the FLT93 makes it a perfect fit in these harsh conditions, requiring
virtually no maintenance over a long service life.

The FLT93 switch is a dual-function instrument that indicates flow and
temperature, and/or level sensing in a single device. Dual 6A relay outputs are
standard and are assignable to flow, level or temperature. Based on FCI’s
thermal dispersion expertise, the unique sensor technology of the FLT93 switches,
combined with FlexSwitch temperature-compensation circuitry, introduces
unparalleled performance capabilities:

  • Exclusive flow accuracy as precise as ±2% of the
    setpoint velocity over ±28¡C temperature range; repeatability of ±0.5%
  • Level resolution of ±2.5mm; repeatability of ±1.3mm
  • Standard temperature accuracy ±1¡C; repeatability
    ±0.6ÀöC; improved temperature accuracy is available with factory

One standardised, field-configurable FLT93 FlexSwitch control circuit
satisfies virtually any combination of application requirements. FCI’s advanced
FlexSwitch technology can be packaged in integral or remote configurations for
installation flexibility.

The rugged FLT93 switch is hydrostatically proof pressure tested to 240
bar (g) at 21¡C. De-rated with temperature, the maximum operation service
recommended is 162 bar (g) at 260¡C. Higher ratings are available with special
construction and test certification.

Depending on the model and materials chosen, the FLT93 switch can withstand
temperatures up to 454¡C. Comprehensive agency approvals for hazardous, Div.
1/Zone 1 environments include: ATEX, FM, FMc, IECEx, Inmetro and EAC/TRCU.

For further
information, please visit the AMS Instrumentation and Calibration website or call 03-9017 8225, or
Freecall (NZ) 0800 442 743. 

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