An injection valve including a housing having a port, an insert movably disposed in the housing, a seal and a diffuser disposed on the insert, the seal and diffuser being movable with the insert. A method for injecting in a borehole including pumping fluid into the borehole, pressurizing an inside diameter of an insert of an injection valve, moving the insert of the injection valve to a position that is not fully closed, diffusing fluid flowing from the inside diameter of the insert; and then flowing the diffused fluid past a seal on the insert.