Continuously sweeping a stack with purge gas can result in exorbitant operating expenses over time; especially for large diameter stacks. The Molecular Seal is a purge reduction device which allows the flare system operator to use 98% less purge gas while continually sweeping the system. The savings in daily purge gas consumption over the long run makes for a short payback period on the initial capital investment of the molecular seal, which can also be referred to as labyrinth or density seal.
The Sentinel flame monitor reliably provides remote flame detection up to 550 feet away, durability, ease of maintenance, and rapid response time. If the monitor detects the absence of a flame for an adjustable amount of time, a set of dry form C contacts are activated and the pilot re-ignition system is set into motion. Response times are markedly quicker than those of a standard thermocouple wince the monitor can immediately sense the loss of flame. Since the Sentinel monitors a UV spectrum specific to hydrocarbons, solar ultraviolet rays have no effect on the monitor.