Regarding fire pumps

2017-01-11 View Original

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NFPA20 requires electric fire pumps to be equipped with a circulation relief valve; what is its function? Why don’t diesel-driven pumps require a circulation relief valve?

Reply #2 2017-01-11

What’s that? Fire pumps require pressure stabilization~~

Reply #3 2017-01-11

Generally, diesel engines are used as backup units, and motor-driven systems require voltage stabilization

Reply #4 2018-07-23

The reason is that in diesel fire pumps, there is a circulation path between the pump outlet and the diesel engine’s water-cooling heat exchanger, which functions as a minimum flow bypass; electric fire pumps do not have such a mechanism, and therefore a circulation relief valve is required

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Regarding fire pumps

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