LJUDDEMPNINGSANORDNING FOR EN BLANDARVENTIL

A sound damper in a mixing valve of the type comprising a valve body, a stationary ceramic disc located in a seat in the body and having inlets for hot and cold water and an outlet for mixed water, a moving ceramic disc having an opening which cooperates with the openings of the stationary disc for the control of the flows of cold and hot water, a plastic piece being fixed on top of the moving disc and a recess in the lower surface of the plastic piece forming, together with the moving disc, a flow chamber for water. Sound attenuation is achieved in a simple manner by providing at the lower surface of the plastic piece ribs which are integral with it and extend, mutally parallel and mainly in planes normal to the moving disc, in the flow direction of water, the ribs partly extending, at the opening of the moving disc, down substantially as far as the interface between the moving disc and the stationary disc.