Hello,
Yes, you should be able to do it with this process:
1) Create a new isolation valve flextable with just the isolation valve label, isolation valve diameter and referenced pipe fields.
2) Export the flextable to shapefile
3) Use Modelbuilder to sync-out the pipe diameters to the shapefile's dbf, associating by the pipe label field and choosing to only update
4) Use Modelbuilder again to import the shapefile back in and update the isolation valve diameter fields
I've attached a document showing the details of this process.
Jesse
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.