Take a peek at this:
IBM Knowledge Center
Sorry, I don't have much time to go into depth on this one right now, but yes you can export the vg and import the vg on a new system.
example:
NodeA
- unmount all FS
- varyoffvg <vgname>
- exportvg <vgname>
- rmdev -dl hdiskX <where the vg resided>
NodeB
- Assuming everything is zoned for the lun.
- cfgmgr
- lspv to find your new hdisk
- importvg -y <vgname> hdiskX
- mount the filesystems
- change characteristics as needed for the VG and FS
Should be noted that importvg creates file mount points and entries in the /etc/filesystems