Sizing a Pressure Relief Valvle

Discussion in 'Boiler Forum' started by dlee, Jul 18, 2010.

  1. dlee

    dlee New Member

    Joined:
    May 24, 2010
    Location:
    Maryland
    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. Furd

    Furd Engineer

    Joined:
    Jul 3, 2007
    Occupation:
    Retired energy systems engineer
    Location:
    Wet side of Washington State
    Yes. sojkp[owfmz[p
     
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  4. nhmaster3015

    nhmaster3015 Master Plumber

    Joined:
    Jul 30, 2008
    Occupation:
    Teacher
    Location:
    The granite state
    what type of heater?
     
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