on the concave surface in the socket 1a of the housing section 10 the operator removes the screws 11 and resorts to a suitable brush or other material removing tool the possibility to carry out such thorough and convenient cleaning constitutes an important feature of the invention another advantage of the improved valve is that the conveyed fluid or fluids are confined to the flow along predetermined paths by resorting to a relatively small number of simple sealing elements and sealing devices as mentioned above the valve is particularly suitable to ensure controlled flow of highly pressurized fluids including paints lacquers and other fluids which exhibit a tendency to incrustate so that the valving element requires frequent inspection and thorough cleaning including scraping off the layer or layers of incrustated material as can be readily seen in fig2 the combined height of the housing sections 2 and 10 is a relatively small fraction of the width or depth of the illustrated housing such compactness of the housing and hence of the entire valve is often desirable and advantageous in connection with the spraying or other application of lacquers paints and other fluids moreover the only slightly curved paths for the flow of fluids through the passages 3 4 and the respective channels 13 or 14 offer only relatively small resistance to the flow of fluids through the housing and the valving.