| 摘要 |
<p>A dump valve (200) for selectively placing the inlet port (16) of a height control valve (10) into communication with a source of pressurized air or atmosphere. The dump valve comprises a body (202) having a control bore (204), an opposing pilot bore (208), an exhaust bore (254) intersecting the control bore (204), and a connection bore (236) intersecting the control bore (204). The connecting bore (236) has means (53, 58) for fluidly connecting the connection bore (236) to the inlet bore (16) of a height control valve (10). A valve seal (246) disposed within the control bore (204) for reciprocal movement therein selectively places the connection port (236) in communication with either the supply port (218) or the exhaust port (254). A piston (260) axially disposed in the pilot bore (208) for reciprocal movement therein controls the movement of the valve seal (246) in response to the selective application of pressure to the pilot bore (208).</p> |
