Refer
to proper ASME code Section I or Section VIII
Pressure Setting Points
ASME Code stipulates that the pressure setting of a safety
relief valve does not exceed 10 PSIG or 20% of the operating
pressure of the system or vessel.
Capacity Guidelines
ASME Code - Section I
The total relieving capacity of the valve shall not be less
than the maximum operating pressure of the vessel of line;
as designed by the manufacturer.
ASME Code - Section VIlI
Minimum relieving capacity shall discharge the total maximum
amount of the system without a rise in the pressure vessel
in the event of overpowering the system or lines operating
pressure.
About Sizing
It is important to not oversize a relief valve. Typically,
this will result in valve chatter or rapid opening and closing
of the valve seating and disk. If Chattering is present,
it could be more economical to use two valves. For ASME
calculations or further information, please contact Aquatrol.
CONTACT AQUATROL FOR SPECIFIC
ASME OR API SIZING CALCULATIONS
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