Method for testing a spring pack of a motor operated valve
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United States of America Patent
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-
Dec 3, 1996
Issued Date -
N/A
app pub date -
May 5, 1995
filing date -
Mar 3, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for testing a spring pack of a valve operator, the apparatus including a hollow housing with a coupling for attaching to the valve operator. A slider is received within the housing and moves therein when driven by a bolt that extends through a threaded aperture in the housing. A load sensor is attached to the slider and extends through the coupling and engages a valve operator component that is connected to the spring pack. As a technician turns the bolt, the apparatus compresses the spring pack within the valve operator and the load sensor produces an electrical signal that indicates how much force is exerted by the spring pack. At the same time, a transducer produces another electrical signal indicating the displacement of the spring pack.
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