Valve stem travel limiting apparatus

Details Valve stem travel limiting apparatus Valve stem travel limiting apparatus

1983-03-10

1986-05-13

Dorner, Kenneth J.

Valves and valve actuation

Limit stop

Adjustable

137538, 137540, 292307R, 411237, 411254, 411272, 411335, F16K 5100

Patent

active

045881634

ABSTRACT:
A stem travel limiting apparatus provides a relatively tamper proof limit setting device for an adjustable valve stem. In a preferred embodiment, an internally threaded annular collar is positioned about an externally matingly threaded stem, the collar having a spaced gap in its annular body. A locking ring is positioned over the collar, and is of a size relative to the collar to develop sufficient force over the collar to partially close the gap and to force the threads of the stem and collar into distortion. The apparatus is positioned along the stem during assembly of a control valve to thereby provide a limit to a manually adjustable setting of the control valve.

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