Liquid Level Measurement - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4107
3.4.5 Adjust valve packing
Over time, the packing material inside a Rosemount manifold may require adjustment in
order to continue to provide proper pressure retention.
Not all manifolds have this adjustment capability. The manifold model number will indicate
what type of stem seal or packing material has been used.
Procedure
1. Remove all pressure from device.
2. Loosen manifold valve jam nut.
3. Tighten manifold valve packing adjuster nut turn.
4. Tighten manifold valve jam nut.
5. Re-apply pressure and check for leaks.
Postrequisites
You can repeat the above steps, if necessary. If the procedure does not result in proper
pressure retention, replace the complete manifold.
Figure 3-20: Valve components
A
D
C
B
A. Bonnet
B. Ball seat
C. Packing
D. Stem
E. Packing adjuster
F. Jam nut
G. Packing follower
3.5

Liquid level measurement

Differential pressure transmitters used for liquid level applications measure hydrostatic
pressure head. Liquid level and specific gravity of a liquid are factors in determining
pressure head. This pressure is equal to the liquid height above the tap multiplied by the
specific gravity of the liquid. Pressure head is independent of volume or vessel shape.
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F
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Hardware installation
February 2024
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