Boiler mountings are safety components mounted on boilers that include a water level indicator, safety valves, pressure gauge, feed check valve, steam stop valve, blow off cock, fusible plug, man hole, and mud hole. They monitor water level, relieve excess pressure, regulate steam and water flow, and allow access for cleaning and maintenance to safely operate boilers.

1. Boiler
Mountings
prepared by : R.V.Varmora

2. Boiler mounting
Boiler mountings are the machine
components that are mounted over the body
of boiler itself for the safety of the boiler.
According to the Indian Boiler
Regulations(I.B.R.)a boiler is a closed
pressure vessel with capacity exceeding
22.75 liters used for generating steam under
pressure. It includes all the mountings fitted to
such vessel which remain wholly or partly
under pressure when steam is shutoff
prepared by : R.V.Varmora

3. Type of Mountings
 Water level indicator
 Safety valve
 Pressure gauge
 Feed check valve
 Steam stop valve
 Blow off cock
 Fusible plug
 Man hole
 Mud hole
prepared by : R.V.Varmora

4. Water Level Indicator
prepared by : R.V.Varmora

5. Water Level Indicator
 Function:
Indicates the water level in the drum.
The maximum &minimum level is indicated on
that.
 Location:
Placed on the boiler shell. One end is
placed in the steam space &other end is placed
on water space.
prepared by : R.V.Varmora

6. Safety Valves
 Function:
The valve is opened when the steam
pressure in the boiler exceeds the set pressure, The
excess steam goes out from the boiler till pressure is
reached to set pressure.
 Location:
placed on the upper part of the boiler shell.
Its end is placed in the steam space.
 There are four types of safety valves:
1. Dead Weight safety valve
2. Lever Loaded Safety valve
3. Spring Loaded Safety valveprepared by : R.V.Varmora

7. Dead Weight safety valve
Valve
Cover
Flange
Vertical Steel PipeWeights
Discharge
Casing
prepared by : R.V.Varmora

8. Lever Loaded Safety
valve
prepared by : R.V.Varmora

9. Spring Loaded Safety
valve
lever
Steam Pipe
Spring
Branch Pipe
prepared by : R.V.Varmora

10. High Steam& Low Safety
Water Safety valve
prepared by : R.V.Varmora

11. Pressure Gauge
 Function:
It indicates the
Steam pressure in boiler.
 Location:
Mostly placed on
the top of the boiler. It is
fitted in such a way that it
can be read from the
ground. One end is in the
steam space. prepared by : R.V.Varmora

12. Fusible plug
 Function:
It is use to protect
the boil against damage due
to overheating caused by low
water level in the boiler.
 Location:
It is fitted in the
crown plate in the case of fire
tube boiler or on the furnace
from where, steam is in direct
contact.
prepared by : R.V.Varmora

13. Feed Check Valve
prepared by : R.V.Varmora

14. Feed Check Valve
 Function:
To control the feed water. The feed water
entering back to pump is prevented by this valve.
 Location:
Opposite side of the boiler or at the bottom
it is fitted. It is fitted at the end of the line from where
feed water is entering to boiler.
prepared by : R.V.Varmora

15. Steam stop valve
 Function:
It regulate the flow of
steam from boiler to the steam
pipe or from one steam pipe to
the other.
 Location:
Fitted on the top of
the boiler shell.
prepared by : R.V.Varmora

16. Blow off cock
 Function:
To improve salt,
mud & other impurities
from the boiler. It is also
used to empty the boiler
at the time of inspection.
 Location:
It is placed at
the bottom pipe or is fitted
on elbow pipe.
prepared by : R.V.Varmora

17. Man hole
It is placed on the top of the shell to help operator
to enter the boiler for repair & maintenance
prepared by : R.V.Varmora

18. Mud hole
 It is placed on bottom part of boiler
to remove salt, mud & other
impurities of water.
prepared by : R.V.Varmora

19. prepared by : R.V.Varmora