Information

Boiler Valve Positions

Summary of Valve Positions (1)

Valve	Hydrotest	Boil-Out	Start-Up	Operation
Steam Shut-Off	Close	Close	Open	Open
Steam Stop/Check	Close	Close	Open	Open
Drum Vent	Close(2)	Close(3)	Open	Close
Feedwater Regulator	Close	Close	Close	Open (4)
Regulator Isolation	Close	Close	Close	Close
Regulator Bypass	Open	Open	Open	Close
Intermittent Blowdown	Close	Intermittent	Close(5)	Intermittent
Continuous Blowdown	Close	Close/Open	Close	Open
Chemical Feed	Close	Close/Open	Close	Open
Water Column Drain	Close	Close	Close	Close
Water Gauge Drain	Close	Close	Close	Close
Safety Valve	Gag	Free	Free	Free
Steam Gauge Shutoff	Close	Open	Open	Open

[1]It should be noted that the Boiler may or may not have all the valves. The list is general and only intended for helpful guidance. The Client must develop a detailed valve list for each case.

[2] Opened to fill the system with water. Closed at 15 psig steam pressure.

[3] Closed at 15 psig water pressure.

[4] Opened as required to control water level.

[5] Opened intermittently to maintain drum level during startup.