Hello Swapnil,
Please, see the answer to the same question by Dinesh here:
communities.bentley.com/.../95843.aspx
To iterate shortly here:
Valve Locations report does not have Tag number information by default. You can customize reports using Crystal reports, please refer a Tech note below which guides with the steps:
communities.bentley.com/.../4496.how-do-i-use-crystal-reports-to-add-fields-to-my-report-tn.aspx
I would also suggest you to contact Bentley Professional Services to get the report customized.
Hope this helps.
Justinas