What are the key features of a Burner Management System (BMS)?

BMS ensures safe operation of fired equipment through sequence control and protective shutdown. Key features: startup permissives (proper purge, flame detection, valve positions), purge timing (4-5 air changes minimum), pilot ignition sequence, main flame proving, shutdown on unsafe conditions (loss of flame, fuel pressure, air flow), flame detection technology (UV, IR, ionization), and valve proving systems (leak testing of safety shutoff valves). Design per NFPA 85/86/87, API 556. Independence from basic control, high reliability, and proper flame scanner selection critical. Regular testing of safety functions required.