UFC 3 -430-11
14 February 2001
FIGURES
Figure
Title
7-1
Typical Control Loop ............................................................................................ 7-4
7-2
Typical Pressure Control Loop ........................................................................... 7-5
7-3
Typical Temperature Control Loop .................................................................... 7-5
7-4
Typical Level Control Loop ................................................................................. 7-6
7-5
Typical Flow Control Loop .................................................................................. 7-6
7-6
Typical Cross-Limited (Lead-Lag) Boiler Control System for a Single
Fuel Using Full Metering with Oxygen Trim ..................................................... 7-7
7-7
Single Element Drum Level Control System .................................................... 7-8
7-8
Two Element Drum Level Control System ....................................................... 7-9
7-9
Three Element Drum Level Control System ....................................................7-10
7-10
Multiple Boiler Control Loop Control Master .................................................7-11
TABLES
Table
Title
3-1
Enclosure Ratings ................................................................................................. 3-4
6-1
Boiler Control Panel Indicators, Recorders, and Totalizers ............................ 6-3
6-2
Boiler Control Panel Alarms and Shutdowns .................................................... 6-5
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