A valve assembly includes a first body portion, a second body portion secured to the first body portion, and a cage positioned between the first body portion and the second body portion. The cage has a generally cylindrical body, a bore formed longitudinally through the body, a top surface, an opposing bottom surface, an exterior surface, an opposing interior surface, and an integral, unitary annular flange extending from the exterior surface and around a perimeter of the cage. The annular flange includes a first surface configured to engage the first body portion to form a seal between the cage and the first body portion and a second surface configured to engage the second body portion to form a seal between the cage and the second body portion.