In Jainism, particularly in the Śvetāmbara tradition, "Achalgachh" is one of the prominent gacchas (monastic lineages or sects). The term "9 Samean" refers to the nine main pontiffs or acharyas who are significant in the history of Achalgachh.

Here is a list of the nine main acharyas (nav saman) of Achalgachh:

1. Acharya Ratnaprabhsuriswarji
2. Acharya Jnanprabhsuriswarji
3. Acharya Padmprabhsuriswarji
4. Acharya Jindattsuriswarji
5. Acharya Jinchandrasuriswarji
6. Acharya Jinprabhsuriswarji
7. Acharya Jinmanikyasuriswarji
8. Acharya Jinchandrasuriswarji (the second)
9. Acharya Jinchandrasuriswarji (the third)

These acharyas are highly respected within the Achalgachh tradition, and their teachings and contributions have shaped the lineage. Devotees often pay respects to these nine acharyas, and their remembrance is considered auspicious in Achalgachh tradition.

If you need detailed information about each acharya or the history of Achalgachh, please let me know!