Karunya University is deemed to be a university registered under the UGC rules and regulations. It is doubtful whether a degree from the university is officially accepted.
Rather than asking whether the certificate is valued or not you should be asking about the credibility and how much importance does the certificate holds?
It does not hold much credibility and importance. It is a regular private university and obviously not comparable to any of the IITs or NITs. The recruiters consider it as an average college.
I have heard from many that the students of Karunya University lack technical skills in comparison to other colleges of Coimbatore in fact, the whole of Tamil Nadu.
Overall Karunya University is neither a much-valued college nor a bad one.