Boiler 13 Essential Fittings

Below are the boiler essential fittings;

1. Safety Valves
2. Water Gauges
3. Steam Pressure Gauges
4. Blow Down Valve or Cock
5. Feed Pumps
6. Main Steam Stop Valve
7. Feed Check Valve
8. Inspector's Test Pressure Gauge Attachment
9. Fuse Plug
10. Low Water Alarm
11. Low Water Fuel Cut-Out
12. Manufacturer's Name Plate
13. Registration Plate

Steam Boiler

A boiler is a closed vessel in which water or other fluid is heated. The heated or vaporized fluid (steam) exits the boiler for use in various processes or heating applications.

A fire-tube boiler is a type of boiler in which hot gases from a fire pass through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.

Figure 1: Locomotive fire tube boiler schematic

A water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes. In smaller boilers, additional generating tubes are separate in the furnace, while larger utility boilers rely on the water-filled tubes that make up the walls of the furnace to generate steam.

Figure 2: Water tube boiler schematic