1. Fire Fighting
Pumps

2. Portable pump

3. Vehicle mounted pumps

4. Centrifugal pump
Two parts
Impeller
Volute

5. operating principle
Water inlet
vanes
Water discharge at periphery

6. Single stage / Multi Stage
Gland packing – graphite, cotton or asbestos flax

7. Characteristics of centrifugal pump
No flow – pressure is maximum
Delivery valves opened - pressure decreases
Pumps speed increases – pressure to increases
Drive – IC engine
Pump performance – suction lift

8. Pump performance
Duty point – maximum quantity of water as specific pressure.
7 Kg/cm2 at 3 mt depth

9. Priming devices Reciprocating primer Exhaust ejector
Rotary (sliding vanes)
Rotary (water ring)

10. Reciprocating Primer
It is small force pump which is driven the main pump drive shaft. Usually arranged in pairs or single position double acting pumps. RPM 1000 to 1500.
Advantages:
Simple to operate
Highly efficient
Positive in action
Operates at low engine speed.
Dis-advantages:
Bulky
No. of working parts liable to wear and tear.

11. Exhaust Ejector Primer
It utilizes exhaust gas from engine which are diverted through directed across the apparatus of a tube connected to the impeller chamber. requires full engine speed
Advantages:
Simple in operation
Less subject to damage and mis-handling
Dis-advantages:
Less efficient than reciprocating primers
Acting back pressure on engine

12. Exhaust Ejector Primer
It utilizes exhaust gas from engine which are diverted through directed across the apparatus of a tube connected to the impeller chamber. requires full engine speed
Advantages:
Simple in operation\
Less subject to damage and mis-handling
Dis-advantages:
Less efficient than reciprocating primers
Acting back pressure on engine

13. Water Ring Primer WATER ‘RING’ ROTATING IMPELLER DISCHARGE PORTS
SUCTION PORT STATIONARY BOSS HOUSING

14. Multi-pressure pump

15. Pump Casing

16. Cross section of Pump

17. Water Ring Primer WATER ‘RING’ ROTATING IMPELLER DISCHARGE PORTS
SUCTION PORT STATIONARY BOSS HOUSING

18. reduced service times

19. operating principle

21. THANK YOU