Pressure reducer with dirt trap

Abstract

In a pressure reducer with an inlet pressure chamber with a cylindrical dirt trap dividing the inlet pressure chamber into an inlet-side sub-chamber and a control valve-side sub-chamber, there are backflow means (74) for generating a backflow through the dirt trap from the control valve-side sub-chamber provided within the inlet-side sub-chamber adjacent to the dirt trap. Such backflow means are provided with an annular body with an annular chamber, wherein the annular body is on the outside sealingly guided in a housing of the pressure reducer by two spaced apart sealing rings which surround the dirt trap. The annular body is provided with axially projecting sucking ribs adjacent to the dirt trap and open towards the dirt trap which are connected to the annular chamnber of the annular body. The annular body is rotatable about the dirt trap. The annular chamber can be connected to an outlet by a stop valve.

Dependencies are inferred from the claim text.