Abstract: A concentric flow valve for a dual zone completion tool includes an upper seal bore sleeve, lower inner sleeve, ported sub, opening sleeve, and piston positioned within an outer sub. The upper seal bore sleeve, ported sub, and outer sub define an upper flow bore, and the lower inner sleeve, ported sub, and outer sub define a lower flow bore. The ported sub includes an upper ported sleeve coupled to the upper seal bore sleeve and a lower ported sleeve coupled to the lower inner sleeve, each ported sleeve including a valve port selectively fluidly coupling the respective flow bore to a valve flow path defined by the opening sleeve and ported sub, such that the upper and lower seal bores are fluidly coupled when the opening sleeve is in an open position. The piston is mechanically coupled to the opening sleeve and defines an opening chamber.