While Mukund, who won the title in the PS Kailasam Futures tournament last week, brushed aside the challenge of compatriot Dalwinder Singh 6-2, 6-3, Van Beem beat India's Jayesh Pungliya 4-6, 6-4, 6-3.
Third seed Yurii Dzhavakian of Ukraine and fifth seed American Cameron Silverman were the others to reach the second round.
Results (Indians unless otherwise specified)
Singles main draw (first round): Vinayak Sharma Kaza bt V M Ranjeet 6-1 (retd); Yurii Dzhavakian (Ukraine-S3) bt Siddharth Vishwakarma (IND) 6-4, 6-2;
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Arjun Kadhe bt Phongsapak Kerdlaphee (Thailand) 7-6(1), 6-2; Clement Larriere (France) bt Paramveer Singh Bajwa 6-2, 6-4; Faisal Qamar bt Suraj R Prabodh 6-4, 2-6, 7-6(2); Sasi Kumar Mukund (S1) bt Dalwinder Singh 6-2, 6-3;
Tejas Chaukulkar bt Kelsey Stevenson (Canada) 7-6(5), 6-2; Colin Van Beem (Holland-S2) bt Jayesh Pungliya 4-6, 6-4, 6-3; Jui-Chen Hung (Taipei-S8) bt Prithvi Sekhar 6-2, 6-0; Nitin Kumar Sinha bt Chandril Sood 6-3, 6-4.
Doubles (First Round): Fahad Mohammed/Rishabdev Raman bt Paramveer Singh Bajwa/Anurag Nenwani 7-6(4), 6-7 (4), 10-6; Mohit Mayur Jayaprakash/Vinayak Sharma Kaza (S4) w/o Suraj R Prabodh/Siddharth Vishwakarma; Arjun Kadhe/Sasi Kumar Mukund bt Anvit Bendre/Aryan Goveas 6-4, 6-2.