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What happens if there is a fire at night when the PRV output pressure (P2) is low?

April 26, 2017happens low Night output P2 pressure prv

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What happens if there is a fire at night when the PRV output pressure (P2) is low?

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The controller would immediately sense the increasing flow rate into the DMA and would start increasing P2. If necessary, it would open up the PRV to give maximum P2. Once the fire had been put out, the controller would start to close the PRV to bring P2 back down again to its normal level.