IOM-Ranger
17
4. Premature Packing Leakage.
Possible Cause
Remedy
A.
Over-temperature.
A1.
Remove insulation along body to allow direct
contact with ambient air.
A2.
Replace standard packing with high-temp.
packing - re quires positioner.
B.
Improper packing orientation.
B1.
Ensure correct stack up of packing pieces.
B2.
Determine if packing is being exposed to a
vacuum at any time. Consult factory if vacuum
is
occurring.
C.
Insufficient force/packing follower loose.
C1.
Tighten packing follower/nuts to indicated
dimension per Section 8. Replace with new
packing assembly as necessary.
C2.
Replace packing spring washers if corrosion is
obvious.
D.
New valve installed at operating pressures
and
temperatures.
D.
Adjust per Section III, Subsection E.
5. Seal Retainer/Flange Leakage
Possible Cause
Remedy
A.
Improper pipe supports and anchors.
A.
Provide piping anchors and guides at control
valve station. Restrain bending movements.
B.
Incorrect line bolting.
B.
Use high strength line bolting heat treated alloy
steel (Opt-7A) or corrosion resistant SST
strainer
hard
ened studs (Opt-7C).
C.
Flange bolting unevenly loaded.
C1.
Loosen and remove line bolting, replace flange
gasket and reinstall flange bolting. See Table
3, Section III, for line bolting torques.
C2.
Valve used to “pull” pipe into alignment. Loosen
bolting, properly align pipe and retighten bolting.
D.
Incorrect seal retainer gasket material.
D.
Remove seal retainer gaskets and replace with
factory supplied flexitallic gaskets.
E. Corrosion
E. Consult
factory.
6. Insuf
fi
cient Capacity.
Possible Cause
Remedy
A.
Wrong valve size.
A.
Recheck original sizing conditions with actual
calculated Cv and install new trim pieces or
complete valve as necessary.
B.
Seal retainer too small.
B.
Change seal retainer size in accordance to Cv
calculations.
C.
Improper actuator bench setting.
C.
Calibrate actuator to valve for 90° travel.
