| 摘要 |
<p>A cartridge valve 116 includes a fixed disk 80 and a movable disk 118 mounted in a housing 66. A lever 46 extends through a major opening 72 axially located at one end of the valve 116. The lever 46 is attached to a coupler 130 for facilitating movement of the movable disk 118 relative to the fixed disk 80 to control the flow and temperature of water passing through the valve 116. A flexible valve 144 is attached to the coupler 130 and, in normal use of the valve 116, prevents holes 136 formed therethrough from communicating with a passage formed through the movable disk 118. Air from the environment surrounding the valve 116 can enter the major opening 72, and upon the occurrence of a negative pressure in the water supply, will flex the valve 144 to allow air to enter the supply line to negate the undesirable effects thereof. In another cartridge valve 160, holes 166 are formed through the side wall of the housing 66 to provide further air communication through the holes 136 of the coupler 130. In still another cartridge valve 168, the lever 46 occupies the major opening 72 to the extent that there is no effective communication between the major opening and the holes 136 formed in the coupler 130. In this instance, the holes 166 formed in the side wall of the housing 66 provide the communication between the holes 136 of the coupler 130 and the environment surrounding the valve 116.</p> |
