A pressure relief valve, the valve comprising: a valve body, the valve body having a valve chamber, the valve chamber having a valve seat on a structure raised above a valve chamber base surface and at least one gas port through the valve seat, the gas port adapted for fluid communication of gases through the valve chamber, from {HEAD ~ one side} of {TAIL ~ the valve} to the other side of the valve, the valve seat further comprising a substantially hemispherical dome with a truncated generally flat surface 
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A pressure relief valve , the valve comprising : a valve body , the valve body having a valve chamber , the valve chamber having a valve seat on a structure raised above a valve chamber base surface and at least one gas port through the valve seat , the gas port adapted for fluid communication of gases through the valve chamber , from { HEAD ~ one side } of { TAIL ~ the valve } to the other side of the valve , the valve seat further comprising a substantially hemispherical dome with a truncated generally flat surface
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