18/07/2022
Boiler accessories, location, and function
1- Boiler
location : Boiler room
Function : Generate steam or hot water in a closed vessel
2- Main steam stop
location : On the steam outlet of a boiler
Function : Place the boiler on line or off line.
3- Guard valve
location : On the steam outlet of a boiler directly following the main steam stop valve
Function : Guard or backup to main steam stop
4- Daylight (drain) valve
location : Between the main steam-stop valve and the guard valve
Function : Open only when the main steam and guard valves are closed. Indicates if one of the valves is leaking through.
5- Main steam line
location : The line that conveys steam from a boiler to all branch or distribution lines. When a system is supplied by a bank of boilers connected into the same header, the line(s) conveying steam for the boiler(s) to the header
Function : Carry steam from the boiler to the branches or distribution lines.
6- Root valve
location : Installed in branch or distribution lines just off of the main steam line Function
Function : Isolate a branch or distribution line (serves as an emergency shutoff).
7- Pressure regulating valves (PRV)
location : Installed as close as practical (after a reducing station) to the equipment or area it serves
Function : Equipment that requires lower pressure than main steam line pressure (coppers, dishwashers, steam chests, or turbines)
8- Steam trap
location : installed on the discharge side of all steam heating or cooling equipment, dead ends, low points, or at regular intervals throughout a steam system (automatic drip legs)
Function : Automatically drains condensate and prevents the passage of steam through equipment
9- Drip legs
location : Provided throughout a system where condensation is most likely to occur, such as low spots, bottom of risers, and
Function : Remove condensate from a system manually.
10- Temperature regulating valve (TRV)
location : Install in the steam supply line close to equipment needi
