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Fire Fighting Pumps

Fire Fighting Pumps. Portable pump. Vehicle mounted pumps. Centrifugal pump. Two parts Impeller Volute. operating principle. Water inlet. vanes. Water discharge at periphery. Single stage / Multi Stage. Single stage Multistage Gland packing – graphite, cotton or asbestos flax.

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Fire Fighting Pumps

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  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 • Single stage • Multistage • 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

  20. THANK YOU

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