| 摘要 |
A multiway valve has a bore in the housing connected to the outside by passages, Valve seats are located in the bore between the passages. A valve spindle is mounted for movement in the bore and carries seals engageable with the valve seats. The spindle is mounted in pairs of disphragms, some of which are of the snap-action type, at each end with control chambers on the outside of the diaphragms for receiving pressure fluid. The spaces between the diaphragms are vented. Push rods slidable in each end wall of the casing allow manual operation of the outer diaphragms.
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