Boiler mountings are used to run a boiler in a safe way ex: safety valve, Water level indicators etc. Boiler mountings are primarily intended for the safety of the boiler and for complete control of steam generation process.

Boiler accessories are used to improve the efficiency of a boiler ex: economizer, air preheater etc. Boiler accessories are installed to increase the efficiency of the boiler plants to help in proper working of boiler unit.


Boiler Mountings

  • Boiler mountings are components used for ensuring the safety of boiler operation.
  • These are generally mounted on the surface of the boiler.
  • Control fluid parameters at the inside of the boiler shell.
  • The mountings are the essential part of a boiler, without which boiler operation is impossible.

Examples: Pressure gauges, Water level indicator, Safety valves, Stop valve, Fusible plug, Blow-off cock, etc.

Boiler Accessories

  • Accessories are the auxiliary items required for proper operation of boiler and improve the Boiler efficiency of it.
  • These are integral parts of the boiler, but not mounted on it.
  • Control fluid parameters at outside of the boiler.
  • These are not essential parts of the boiler, without which boiler can operate through at lower efficiency.

Examples: Superheater, Feed pump, Injector, Economizer, Steam Separator, Air preheater, etc.

Difference between Boiler Mountings and Accessories

Boiler Mountings

Boiler Accessories

It amplifies the safety of a boiler

It amplifies the efficiency of a boiler

Mountings are necessary for changeable the boiler.

Accessories are not necessary but their use is enviable.

Commonly they are mounted on boiler shell.

They are not located in boiler shell.

Mountings are installed from simple working and control of a boiler.

Accessories are installed to amplify efficiency of a boiler.

eg. Water level, indicator, Pressure gauge.

eg. : Superheater, Economiser.