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