A drying system comprising at least one powder recovery unit, at least one conveying line for powdery material such as fines from the powder recovery unit, at least one purge line connected to a purge arrangement, and a valve assembly comprising at least one sanitary diverter valve, the sanitary diverter valve comprising: a valve housing having a number of openings (72, 73, 74) configured to be connected to respective lines of the system, wherein the valve housing is substantially cylindrical and includes a first opening, a second opening and a third opening; that the diverter valve furthermore comprises a rotatable diversion member provided with a flow channel having a first end and a second end, an open space being defined between the valve housing and the rotatable diversion member; that said rotatable diversion member is configured to be rotated between a first position in which the first end of the flow channel is located opposite the first opening of the valve housing and the second end of the flow channel is located opposite the third opening of the valve housing, and a second position in which the first end of the flow channel is located opposite the second opening of the valve housing and the second end of the flow channel is located opposite the first opening of the valve housing, such that fluid communication is selectively provided between the first opening and the third opening and between the first opening and the second opening of the valve housing; and that fluid communication is provided between the open space and the second opening of the valve housing in the first position and between the open space and the third opening of the valve housing in the second position; wherein the valve assembly comprises a second valve connected to the two-way sanitary diverter valve via a fourth opening included in the number of openings of the valve housing, said fourth opening being in fluid connection with the open space of the two-way diverter valve, wherein the second valve is configured to be brought in fluid connection with the at least one conveying line and with the at least one purge line, and further wherein the second valve is a plug valve having a plug end adapted to close off the fourth opening of the valve housing; and wherein said sanitary diverter valve is connected to said at least conveying line and said at least one purge line, such that the sanitary diverter valve is configured to be operated as a two-way sanitary diverter valve selectively for liquid, air/gas and/or powder. a valve housing having a number of openings (72, 73, 74) configured to be connected to respective lines of the system, wherein the valve housing is substantially cylindrical and includes a first opening, a second opening and a third opening; that the diverter valve furthermore comprises a rotatable diversion member provided with a flow channel having a first end and a second end, an open space being defined between the valve housing and the rotatable diversion member; that said rotatable diversion member is configured to be rotated between a first position in which the first end of the flow channel is located opposite the first opening of the valve housing and the second end of the flow channel is located opposite the third opening of the valve housing, and a second position in which the first end of the flow channel is located opposite the second opening of the valve housing and the second end of the flow channel is located opposite the first opening of the valve housing, such that fluid communication is selectively provided between the first opening and the third opening and between the first opening and the second opening of the valve housing; and that fluid communication is provided between the open space and the second opening of the valve housing in the first position and between the open space and the third opening of the valve housing in the second position; wherein the valve assembly comprises a second valve connected to the two-way sanitary diverter valve via a fourth opening included in the number of openings of the valve housing, said fourth opening being in fluid connection with the open space of the two-way diverter valve, wherein the second valve is configured to be brought in fluid connection with the at least one conveying line and with the at least one purge line, and further wherein the second valve is a plug valve having a plug end adapted to close off the fourth opening of the valve housing; and wherein said sanitary diverter valve is connected to said at least conveying line and said at least one purge line, such that the sanitary diverter valve is configured to be operated as a two-way sanitary diverter valve selectively for liquid, air/gas and/or powder.