Reliable Relief Valve and Flare Gas Flow or Leak Detection

Petrochemical industry process and plant engineers searching for a precision flow/level/temperature switch for use in liquid, air, gas or for interface service will find the FLT93 Series FlexSwitch from Fluid Components International (USA) provides an effective and highly reliable solution in a wide range of applications.

Ideal for use in oil/gas upstream production or downstream refining, storage and distribution, the Fluid Components International (FCI) FLT93 Series FlexSwitch provides dependable relief valve monitoring and flare gas flow or leakage detection. The FLT93 Series FlexSwitch improves plant safety and environmental compliance by helping to assure operators that relief valves and flare gas systems are functioning properly.

FCI’s FLT93 Series FlexSwitch is the process industry’s most advanced heavy-duty thermal dispersion technology flow and level switch in the world. Its multi-parameter measurement design is based on more than 45 years of flow and level switch engineering and application experience, providing a rugged long-life instrument.

SIL2 rated for ultra-reliability, the FLT93 Series FlexSwitches are found in the world’s most demanding processes and plants. Ex agency approvals are provided for the entire instrument—FM, FMc, ATEX, IECEx and more. They are ideal for use in a wide range of oil and gas upstream and downstream applications as well as in other rugged industries with high reliability instrumentation requirements.

A dual-function instrument, the FLT93 Series FlexSwitch can be configured for flow or level sensing, flow + temperature sensing or level + temperature sensing. A single FLT measures and monitors flow or level and temperature simultaneously with excellent accuracy and reliability. Dual trip points and 6A relay outputs are standard and are assignable to flow, level or temperature.

FCI’s unique sensor technology of the FLT93 Series switches, combined with FlexSwitch temperature compensation circuitry, provide users with unparalleled performance capabilities: Exclusive flow accuracy as precise as ±2% of the setpoint velocity over ±50°F [±28°C] temperature range; repeatability of ±0.5% reading. Level resolution is ±0.1 inch [±2.5 mm]; repeatability of ±0.05 inch [±1.3 mm]. Standard temperature accuracy is ±2.0°F [±1°C]; repeatability ±1.0˚F [±0.6˚C]; improved temperature accuracy is available with factory calibration.

Two standard sensing element configurations are available to meet your most demanding application requirements. The FLT93 S is designed for use in standard heavy industrial applications and in applications with high velocity liquid setpoint requirements; the FLT93 F is designed for fast response gas applications. Both sensing elements can be supplied in either standard (-40 to 350°F [-40 to 177°C]) or medium (-100 to 500°F [-73 to 260°C]) temperature configurations. The FLT93 S is also available in a high temperature (-100 to 850°F [-73 to 454°C]) configuration.

A wide selection of standard and custom process connections can be provided. The electronic control circuit can be integrally-mounted with the sensing element, or it can be located in a remote location. The standard enclosure is a coated aluminium alloy. It can be used in ATEX locations and is rated for NEMA Type 4X (IP66) environments.