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Thread: Sizing a Pressure Relief Valvle

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  1. #1
    DIY Junior Member dlee's Avatar
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    May 2010
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    Default Sizing a Pressure Relief Valvle

    My heater is 399,900 BTU input and has a working pressure of 75 PSIG. Can I use a 510,000 BTU pressure relief valve witha rating of 30 PSI? The maximum working pressure on one device in the system is 50 PSI and the max presure in the system is 20 PSI.

  2. #2
    Engineer Furd's Avatar
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    Yes. sojkp[owfmz[p

  3. #3
    In the Trades Wally Hays's Avatar
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    what type of heater?
    Perception is 3/4 of reality

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