If you are importing an application, the RSV instance will be included as part of the zip. If you are moving only rulesets as part of your product then add the RSV pzInskey in your product. Hope this will help you.
(I hope I don't go to into detail for what you may have already tried or know about but it might also help others :) )
It would appear you have confirmed that the RSV (which I am guessing you mean Ruleset Version) is contained within the Records | SysAdmin | Ruleset. Once that's confirmed then you know that the ruleset is in the system. If you can't search for and find it, you may want to ensure the index for rules is either working or up-to-date. If you want to use the ruleset in a particular application make sure you add the definition of the ruleset within the particular application. And with that in mind, make sure you define the ruleset with the appropriate version. for example, if your RSV that you want is 01-02-01 and you have it defined in the application as 01-01-55, the code for 01-02-01 won't be usable in the application until you change the dependent version to something like 01-02 (or 01-02-01)
Make sure that you haven't explicitly excluded Ruleset and Ruleset Version under Global Exclusion in the Prodoct rule. If it is excluded, you will not see the Ruleset Version in the target platform, but you will still be able to see all the rules in that Ruleset version in the target platform. Hope this helps.
If your exported RAP contains the RSV which doesn't get imported into the target system, we'll have to look at the RAP and perhaps run import with Tracer/Debug to determine the reason for the missing RSV. I suggest entering an SR for it.