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
PT-1201 Pressure transmitter
PIC-1201 Pressure indicating controller
PV-1201 Pressure control valve
PSV-1201 Spring loaded pressure safety valve
How it works
PIC-1201 holds vessel pressure by venting or letting down through PV-1201. PSV-1201 is the last line of protection. It is sized and set by engineering. Maintenance removes, benches and reinstalls it on a controlled interval with records.