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Pump types and theory . Types of pumps. There are three main types that will be covered; Rotary gear Rotary vane Centrifucal Centrifucal pumps are the most common type of pump found today, we will go into its use in depth. Rotary Gear Pumps.

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Presentation Transcript
types of pumps
Types of pumps
  • There are three main types that will be covered;
    • Rotary gear
    • Rotary vane
    • Centrifucal
  • Centrifucal pumps are the most common type of pump found today, we will go into its use in depth
rotary gear pumps
Rotary Gear Pumps
  • Rotary pumps work by using tight tolerance gears to push water
  • Tolerances are so tight that this pump will pump air
rotary vane pumps
Rotary Vane Pumps
  • These pumps work like the rotary gear pumps, but have vanes that can extend and retract
  • This pump resists the effects of wear much better
parts of the centrifical pump
Parts of the centrifical pump

Throttle controls the rotation speed of the impellor. More throttle = more pressure

water supply for the pump
Water supply for the pump

Booster tank

Intake from steamers and 2 ½

tank fill
Tank fill

Water being supplied to steamer intake into pump, flowing discharges and filling tank at the same time

discharge manifold
Discharge Manifold
  • The water being discharged from the pump is forced into a manifold; the junction for all discharge lines
  • The manifold has all of the discharge valves that are controled from the pump panel
using the relief valve
Using the relief valve

Relief Valves are

Used to sharp increases in pressure from going all the way through the attack lines and harming the nozzle crew

Excess pressure is dumped into the intake side of the pump

centrifucal pump problems
Centrifucal Pump Problems
  • There are several conditions that can reduce the life or destroy the pump;
    • Running the pump with nothing flowing or circulating
    • Cavitating the pump
    • Running the pump dry
pump running but not discharging
Pump Running, but not Discharging
  • Water that is held in closed lines and in the pump will be warmed by the friction of the running pump
  • If let go long enough, the water can boil and cavitate the pump
  • Check to see if your hoselines are warm or hot
pump cavitation
Pump Cavitation
  • This occurs when there is too much air in the pump, or there is more water being discharged than is coming into the pump
  • Sounds like gravel rolling around on the inside of the pump casing
running the pump without water
Running the Pump Without Water
  • Pumps need the water for cooling, lubrication, and to swell the packing
  • Without water in the pump, the heat from friction will quickly destroy a pump
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