With their fourth consecutive win, Namdhari topped the points table in the Pool A.
Irrespective of the final result, it was Rajasthan who took the lead in the 29th minute through Saif Ali Khan.
But Namdhari drew level at the stroke of halftime from a penalty stroke which was perfectly converted by Santa Singh (35th).
Namdhari sealed the match in their favour in the 65th minute when Santa Singh scored his second goal of the day, this time from a field effort.
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In the second match of the day, Mumbai Hockey Association Ltd were held to a 1-1 draw by Jammu and Kashmir.
After a barren first half, Jammu and Kashmir went ahead in the 53rd minute through Amrinder Singh's goal before the Mumbai outfit equalised in the 63rd minute through Kuldeep's strike.
The third game of the day between Bihar and Sashastra Seema Bal (SSB) also ended in a draw.