what are the parts of a closed boiler system?

Answer 1

Assuming you are only talking about a house boiler, if you need Steam Generators at a power plant--E-mail me

Feed water inlet--someplace where the make-up water can enter the boiler.

Boiler Drum--place where the water is heated to turn to steam

Steam piping--Where the hot steam is distributed though out the house leading to the:

Heat exchangers--or radiators, generally in each room, after going through the radiators the steam goes through the return line back to the boiler to be reheated and reused.

Low water trips--if the boiler level gets below a preset level it will not allow the boiler to heat anymore until the water is introduced thus raising the level above the trip point.

Boiler drain-when boiler is shut down for the summer it should be drained and flushed a couple of times to get rid of muck and mud.

Sight glass-so you can actually see the level in the boiler drum--required for some pressure boilers.

Safety valve-set for a pressure so if for some reason the boiler raises pressure past that point the safety will lift and relieve the pressure-much like a pressure cooker.

Heat source: Gas fired, Fuel oil fired, electric or wood/coal.

Note: some home boiler have the make up coming off the hot water heater, and some homes have the boiler providing hot water to the house.

Note: Some boilers, especially the hot water boilers will have a recirculation pump which pushes the hot water around.

Answer 2

Water Inlet, Water Tubes,Combustion chamber(with flue) where air and fuel are mixed which creates a fire and heats the water tubes which creates steam that flows up to the steam outlet.Of
course there are pressure and flow regulator and pressure relief valve.
That's about it.