| 摘要 |
An adjustable distribution valve comprises a body defining first and second axially-aligned branches and a third branch extending laterally thereof, substantially in the form of a T. A plug element is fitted in the passage formed by the axially-aligned branches and is movable therewithin. The plug element is bounded by a cylindrical surface of diameter equal to the diameter of the passage, and two opposed concave surfaces which intersect the cylindrical surface at a point substantially halfway along the plug element and at opposite ends of the plug element at positions which are diametrically opposite said point. The plug is movable longitudinally within the passage between a first position in which it distributes fluid received by way of the third branch to both the first and second branches, a second position in which it blocks the first branch and directs fluid received by way of the third branch to the second branch, and a third position in which it blocks the second branch and directs fluid received by way of the third branch to the first branch.
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