The invention relates to an adjustable steam injector of the type which has an injector housing with an inlet for a product which is to be heated and an inlet for steam. The injector housing also has an outlet for the product mixed with steam. The injector also includes an injector body displaceable in the injector housing. About the front end of the injector body there are disposed concentric gaps for product and steam, respectively. The injector body has a recess in its front end. The recess has the same extent as the cross sectional surface of the injector body and has its greatest depth in the centre of the injector body.
