| 摘要 |
<p>A diaphragm type of flush valve for use with toilet devices such as urinals and water closets includes a body with an inlet and an outlet and there is a val ve seat therebetween and a valve member movable to a closing position on the valve seat. The valve member includes a diaphragm which is peripherally attached to the body. Th ere is a pressure chamber above the diaphragm for holding the valve member on its valve s eat and there is a filter and a bypass orifice connecting the inlet and the pressure cha mber. The filter includes a filter ring positioned beneath the diaphragm and adjacent the outer p eriphery thereof. The filter ring and the diaphragm are held in a fixed position relative to each other. The filter ring has a plurality of outwardly directed circumferentially spaced f ilter grooves. There is a seal ring between the filter ring and the body and facing the grooves . A peripheral chamber is bounded by the seal ring, the filter ring and the body, with water re aching the peripheral chamber by passing through the filter ring grooves. There is an orifi ce connecting the peripheral chamber and the pressure chamber.</p> |
