The invention relates to separator for separating gas bubbles and/or particles from a liquid. The separator comprises a collection chamber, a fluid inlet, a fluid outlet, and a first fluid flow path extending from the fluid inlet through the collection chamber to the fluid outlet. The separator includes at least one separating element arranged for separating gas bubbles from the liquid arranged in the first fluid flow path. The separator further includes at least one plate arranged in the collection chamber such that the plate defines a passage forming a second fluid flow path at least partially bypassing the separating element.