Hello Ray, We have reproduced it version 08.11.09.440. This has been fixed in later version of OpenPlant Modeler. Say 08.11.09.564 & later. As workaround you need to ensure that Spectacle blank flange gets placed on the MAIN_PORT side of the valve, as the wrong calculation is happening only at the RUN_PORT side of the valve. See below steps. Launch OpenPlant Modeler. Use Spec mA1-OPM with size DN50. Place a valve. Assign a spectacle blank flange at the MAIN_PORT side of the valve see image below. Check Operating Conditions tab under Element Information dialog box for Bolt length. See image below. HTH -Regards | Rahul Kumar
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