spindle-valve

Century Dictionary and Cyclopedia

1. n. A valve having an axial guide-stem.
2. n. A valve which is actuated from without the casing in which it works by a rod or stem or spindle. The spindle may be threaded, so that the valve is operated by screwing the spindle or turning it in a nut; or the spindle may be pushed in or out without turning. When the stem or spindle does not screw in and out, the valve is called a valve with non-advancing stem; when it does move in and out it is said to be an advancing-stem valve.