Nozzle design on mixproof valves

A cleaning system for cleaning one or more valve seats in a valve and for cleaning one or more interior surfaces of said valve with a cleaning agent, where said cleaning system is arranged in a mixproof valve consisting of at least a valve body, one or more valve seats, a first valve plug with a first stem and a second valve plug with a second stem, the second valve plug having a central hollow part for guiding the first stem, said cleaning system has nozzle means for creating two different spray patterns, said nozzle means being arranged between and/or on the first stem and the hollow central part of the second valve plug, where a first spray pattern primarily is used for cleaning the interior surfaces of said valve and where a second spray pattern primarily is used for cleaning one or more of said valve seats, while the valve is open between a product area and a drain area, the nozzle means for the second spray pattern for cleaning one or more of said valve seats are provided with one or more apertures with an angle to the first stem, and are provided with nozzle means with a cone-shaped ring gap, where said nozzle means provided with one or more apertures are connected to a pressurized supply of cleaning agent, and where the direction of the one or more apertures and thus the direction of the second spray pattern are provided with an angle to the first stem and towards the valve seat of the first valve plug and the valve body.