| 摘要 |
A valve for directing corrosive fluids or the like from port to port without contamination includes beam members adapted to interconnect a plurality of valve bodies in stacked and interlocked relation, a control mechanism for moving the spool of a spool valve to a centered or off position, and a spool that makes possible an arrangement whereby a spool valve can be used as an aspirator that may be connected in a discharge conduit of a system from which caustic, abrasive or otherwise harmful fluid must be discharged.
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