IIT Delhi Ph.D is considered valuable both academically and professionally. It portrays a high level of expertise and knowledge in a specific field of study. It also has a rich research culture and thus its Ph.D. degree holds quite a value
A Ph.D. degree from anywhere is just a means of opening more opportunities and its value is determined by how well you avail those opportunities and making the most out of them. Similarly, a Ph.D. from IIT Delhi surely opens numerous doors based on your area of research, research method, research advisor, and various other factors.
A well-known professor, Dr. Naveen Garg, CSE, completed his Ph.D. from IIT Delhi and is considered one of the smartest professors in the CSE department. He completed his B.Tech and Ph.D. in Computer Science from IIT Delhi, was a postdoctoral researcher at the Max-Planck-Institut fur Informatik, Germany, and became a professor at IIT Delhi in 1998. He largely contributed to the Design and analysis of approximation algorithms for NP-hard combinatorial optimization problems arising in network design, scheduling, routing, facility location, etc. Additionally, he is a Fellow of the Indian Academy of Science, Bangalore, and was awarded the SS Bhatnagar Award for Mathematical Sciences in 2016.
If he can make so much out of his Ph.D. anyone with the right mindset and determination can!