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Thermal Flow Switch

The FLT93L Series FlexSwitch from Fluid Components International is for process relief valve leak monitoring in natural gas liquids (NGL) fractionation processing.

Aw 113238 1701np Fci

NGL fractionation requires early and reliable indication when a relief valve leaks or lifts during an overpressure situation. This switch accurately monitors the pressure relief valves for escaping flow with a thermal dispersion technology flow sensing switch/alarm, detecting leaking or seeping gas in the lines to alert the engineer to over pressurization. It issues a programmed alarm during such events, and can detect low flows without issuing false alarms. Flow accuracy is ±2% of setpoint velocity over a ±50 °F (±28 °C) temperature range. Repeatability is ±0.5% of reading. 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 aluminum alloy and is rated for NEMA Type 4X (IP67) environments. Global agency approvals for Ex installations are provided, and the switch is SIL 2 rated for reliability.

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Fluid Components International

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