Apparatus to bias valve closure members

摘要

Apparatus to bias valve closure members are described. An example valve includes a valve body having an opening defining a passageway. The opening has an axis that is substantially coaxially aligned with a flow path axis defined by the passageway. A first shaft supports a closure member within the passageway of the valve body and relative to the opening and an end cap removably coupled to the valve body retains the shaft within a bore of the valve body. A spring is disposed between the first seating surface and a second seating surface opposite the first seating surface to provide a force to oppose the weight of the closure member and facilitate alignment of the closure member relative to the opening of the passageway.

主权项

1. A valve comprising:
a valve body having an opening defining a passageway, the opening having an axis that is substantially coaxially aligned with a flow path axis defined by the passageway; a shaft to support a closure member within the passageway of the valve body and relative to the opening, wherein the shaft includes a bore and an inner surface of the bore defines a first seating surface; an end cap removably coupled to the valve body to retain the shaft within the valve body; and a spring at least partially disposed within the bore of the shaft between the first seating surface and a second seating surface opposite the first seating surface, the spring to provide a force to oppose a weight of the closure member and facilitate alignment of the closure member relative to the opening, wherein the second seating surface comprises an annular surface having a leg protruding from the annular surface, the leg to receive at least a portion of the spring when the spring is disposed between the first and second seating surfaces.