Patent ID: 8770226

Claim:
A rotary valve comprising a stator with an inner stator face, and a rotor with an inner rotor face arranged in sealing contact with the inner stator face, the rotor is rotatably movable to a plurality of rotor positions about a rotational axis relative to the inner stator face, the stator comprises a plurality of connection ports each being in fluidic contact with a corresponding valve orifice at the inner stator face and the rotor comprises two or more interconnection paths for selective fluidic interconnection of said valve orifices with respect to the rotor position, wherein the plurality of connection ports include, a main inlet port, a main outlet port, a first component feed port, a first component return port, a second component feed port, a second component return port, and wherein the interconnection paths in the rotor are arranged to: in a first rotor position interconnect the main inlet port with the main outlet port, in a second rotor position interconnect the main inlet port with the first component feed port and the first component return port with the main outlet port, in a third rotor position interconnect the main inlet port with the first component feed port, the first component return port with the second component feed port, and the second component return port with the main outlet port, and in a fourth rotor position interconnect the main inlet port with the second component feed port and the second component return port with the main outlet port.