OPENTECHNICAL PUBLICATION
OT-2026-000000658

Control valves with adjustable valve packing

Published: 2026-09-15T19:03:13.067689Z
Permanent URL: https://opentechnical.org/p/OT-2026-000000658
Categories: Industrial Motion & Power Transmission > Fluid Power

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ABSTRACT

An example apparatus is disclosed herein comprising a valve that includes a
valve body defining a fluid passageway between an inlet and an outlet, a flow
control member in the fluid passageway, a stem coupled to the flow control
member, and a bonnet coupled to the valve body. The stem extends through a
channel in the bonnet. A section of the channel forms a bore. The bore is
threaded. The apparatus includes packing in the channel to form a seal between
the bonnet and the stem. The apparatus includes a worm wheel nut threadably
engaged with the bore. The stem extends through an opening in the worm wheel
nut. The apparatus also includes a worm meshed with the worm wheel nut. The
worm is to rotate the worm wheel nut to cause the worm wheel nut to move and
adjust a load on the packing.

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OpenTechnical publication OT-2026-000000658
Published 2026-09-15T19:03:13.067689Z
https://opentechnical.org/p/OT-2026-000000658