The Sizing Data section of a process data or calculation sheet enables you to enter, view, and modify sizing data when calculating a Relief Valve.
Type the required values and select the required units of measure.
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You can select the Highlight Process Data option from the Options menu to indicate the fields that must be filled.
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There are different properties at relieving conditions when you switch from the Fire to the Non-Fire Case. If you select a Non-Fire Case, you can select Density or Specific Gravity properties.
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Beside Pressure/Vacuum you can select Pressure only, Vacuum only, or Pressure and vacuum; however, note that the software calculates pressure relief valves only, and not vacuum relief valves or dual mode pressure/vacuum relief valves. The vacuum service set point value that you enter beside Valve Set Vacuum is displayed in the process data report for this instrument, but not in the calculation report.