| 摘要 |
<p>A novel flow divider-combiner valve unit is disclosed. A valve body includes fluid passageway means for controlling fluid flow through the divider-combiner valve unit. The fluid passageway means comprises: a cavity, first, second and third passageways; first and second pressure-responsive elements; and biasing elements for retaining the pressure-responsive elements substantially in open positions until a predetermined substantial pressure differential exists in the divider-combiner valve unit. The biasing elements also enable the pressure-responsive elements to move substantially independently of each other toward closed positions when a first pressure differential in the divider-combiner valve unit exceeds the predetermined pressure differential. The biasing elements additionally cause the pressure-responsive elements to move substantially in unison when a second pressure differential in the divider-combiner valve unit exceeds the predetermined pressure differential. The first and second passageways communicate with first and second spaced portions of the cavity. The third passageway communicates with an intermediate portion of the cavity. The first and the second pressure-responsive elements are movable in the cavity respectively between first open positions and progressively closed positions. The fluid passageway means controls fluid flow through the dividercombiner valve unit by controlling fluid flow between the first and the second cavity portions and the first and the second passageways.</p> |
