Pumping In Pressure on The Fire Ground (Pump Series - Part 7)

Last week we talked about pumping in Volume (or Parallel). Today we are going to look at the second FUNCTION our pumps are capable of - running in Series (or in Pressure)

When our two-stage pump is running in series, the two impellers have now “aligned,” or been “stacked.” Again we use these phrases to help you visualize the function, not describe the actual anatomy of the pump.

As water (volume) enters the intake side of our pump it is now routed (via the transfer valve and two flapper valves that close) from one impeller into the eye of the second impeller. As velocity is induced (via the first stages’ impeller) to our volume, it leaves the first stage of our pump with greater pressure. As it enters the second stage (the eye of the second impeller) additional velocity induced generates additional pressure as it leaves the second stage of our pump resulting in greater discharge pressures than if we ran in parallel.

Whereas the stages of our pump were working independently in parallel, now our stages are working in a series… one feeding the next.

As a FORCE MULTIPLIER, Series allows us to take the already pressurized water source (the municipal water system via hydrant) and add TWO levels of pressure increase to the discharged volume.

Scenario Example:
If impeller #1 produces 500gpm @ 100psi,
Then impeller #2 increases the original 500gpm another 100psi
Combined they produce 500gpm @ 200psi

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Видео Pumping In Pressure on The Fire Ground (Pump Series - Part 7) канала Roll Steady