| 摘要 |
<p>An illustrative embodiment of the invention provides a valve seat that has hot, cold and discharge water apertures. A plate, relatively rotatable with respect to the valve seat, is pressed against the valve seat surface. A cavity formed in the plate adjacent to the surface in contact has a pair of axisymmetric lobes which are asymmetric with respect to an axis that is perpendicular to the axis of symmetry. This configuration permits cold water flow first through the valve with counterclockwise motion of the plate in spite of the relative sources of hot- and cold-water through simple inversion of the plate, as appropriate. Hot- and cold-water pressure loss and surge protection, moreover, is provided through a pressure balancing valve.</p> |
