We prove that the key map on crystals can be reduced to the simply-laced types by using virtualization of crystals. For this, we use the original definition of virtualization coming from the dilation of crystals by Kashiwara. As a direct application, we obtain algorithms to compute orthogonal evacuation, keys and Demazure atoms in type \( B_n \) in terms of Kasiwara-Nakashima tableaux. In particular, we are able to use type \( A_n \)\( \)\( \)\( \)\( \) and \( C_n \) methods. For type \( C_n \), we apply the results obtained by Azenhas-Tarighat Feller-Torres, Azenhas-Santos, and Santos.