Quote :" The idea behind the SQL-dump method is to generate a text file with SQL commands that, when fed back to the server, will recreate the database in the same." pgAdmin_Backup_Restore.pdf

http://get.enterprisedb.com/docs/Tutorial_All_PP_pgAdmin_Backup_Restore.pdf
 

Users can take advantage of provided utilities to perform a database dump. For example, in MySQL, the mySQLdump utility will produce this result and can send the data to a remote server if necessary.
 

windows:

C:\>cd C:\Program Files\PostgreSQL\9.2\bin