Cashco Ranger QCT - Manual (Page 17)

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. Insuffi cient 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 fl ange
gasket and reinstall fl ange 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 fl exitallic gaskets.
E. Corrosion E. Consult factory.
6. Insuffi 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.