| 摘要 |
A multi-position rotary shear valve assembly having a substantially metallic or ceramic stator device and a substantially metallic or ceramic rotor device. The stator device defines a substantially planar stator face and at least two or more stator channels in fluid communication with the stator face at corresponding stator ports, while the rotor device includes a substantially planar rotor face defining one or more rotor channels. A tribological coating is disposed atop at least one of the rotor face and the stator face. The valve assembly includes a polymer insert device defining an exposed contact face having an insert inner diameter less than that of the outer circumferential edge and an insert outer diameter more than the outer circumferential edge. The insert device is formed and dimensioned for press-fit insertion in a receiving groove defined in the rotor face such that the outer circumferential edge of the stator face contacts the insert exposed face during the relative rotation between the two or more rotor positions. |
