Draft teaching material marked until The Planner's Bench team signs off on technical accuracy. Symbols follow generally known public conventions (ISA style instrument bubbles, common mechanical and electrical one line shapes). Your site's drawing standards and procedures always govern.
Tag list
LT-1101 Level transmitter on V-1101
LIC-1101 Level indicating controller (DCS)
LV-1101 Level control valve on outlet
LSHH-1101 High high level switch (separate from BPCS)
How it works
LIC-1101 modulates LV-1101 to hold drum level. LSHH-1101 is a separate switch. On high high level it trips inlet feed closed. Planners treat the trip device as safety related scope, not as a spare controller faceplate.