A cylinder head assembly for an encapsulated refrigerant compressor comprising - a valve plate having a suction opening and a discharge opening; - a suction valve spring being mounted to a suction side of the valve plate; - a discharge valve spring being mounted to a discharge side of the valve plate; - a suction muffler having a suction connector head which is connecting an outlet section of the suction muffler with the suction opening and the suction valve spring; - a discharge muffler having a discharge connector head which is connecting an inlet section of the discharge muffler with the discharge valve spring and the discharge opening; - a mounting assembly for fixing the cylinder head assembly to a cylinder housing of the refrigerant compressor; - a first sealing element which is located between the discharge connector head as well as the suction connector head and the discharge side of the valve plate, characterized in that the suction valve spring is welded onto the suction side of the valve plate and the discharge valve spring is welded onto the discharge side of the valve plate, wherein the suction valve spring has a suction spring body, wherein the suction spring body is a flexible metal disk, wherein the suction spring body has a linear first cut-out, which first cut-out separates a suction reed valve section for opening and closing the suction opening of the valve plate from a surrounding static positioning section, wherein the suction valve spring is welded to the valve plate in the positioning section, wherein the movable reed valve section and the positioning section are connected by a hinge section of the suction spring body. - a valve plate having a suction opening and a discharge opening; - a suction valve spring being mounted to a suction side of the valve plate; - a discharge valve spring being mounted to a discharge side of the valve plate; - a suction muffler having a suction connector head which is connecting an outlet section of the suction muffler with the suction opening and the suction valve spring; - a discharge muffler having a discharge connector head which is connecting an inlet section of the discharge muffler with the discharge valve spring and the discharge opening; - a mounting assembly for fixing the cylinder head assembly to a cylinder housing of the refrigerant compressor; - a first sealing element which is located between the discharge connector head as well as the suction connector head and the discharge side of the valve plate, the suction valve spring is welded onto the suction side of the valve plate and the discharge valve spring is welded onto the discharge side of the valve plate, wherein the suction valve spring has a suction spring body, wherein the suction spring body is a flexible metal disk, wherein the suction spring body has a linear first cut-out, which first cut-out separates a suction reed valve section for opening and closing the suction opening of the valve plate from a surrounding static positioning section, wherein the suction valve spring is welded to the valve plate in the positioning section, wherein the movable reed valve section and the positioning section are connected by a hinge section of the suction spring body.