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About Fire Pumps

In most situations on small vessels a standard small fire extinguisher, a diverted bilge or deck wash pump will be all that's needed. However on commercial or larger leisure boats there are often laws and regulation to comply with necessitating specific fire pumps to be installed with more specific performance criteria.

In simple terms the requirement of a fire pump is to be able to control and possibly extinguish a fire from a safe distance. A minimal discharge pressure is required from the pump to overcome the safety distance, after that it is a question of approach. Volume of water can be applied as one approach, pressure is the alternative. Pumps will produce higher flow rates at low pressure (head), as pressure increases flow will decrease.

 

Flexible Impeller Pumps give high volume flow at low pressure, require full bore, unrestricted discharge.
Centrifugal Pumps give high volume flow at low pressure. Flow/pressure can be balanced with a nozzle.
Turbine or Regenerative Pumps give lower flow but at higher pressures. Flow/pressure can be
balanced with a nozzle.