E N G I N E E R E D & P R O C E S S V A L V E S
02/2011 / IOM-WKM-GATE-PRS-01
17
Installation, Operation and Maintenance Manual
Trouble
Probable Cause
Remedy
(continued)
Motor operator will not
actuate valve.
(continued)
Improperly sized motor operator.
(continued)
Replace with properly sized motor operator.
Improperly wired electric operator.
Verify wiring following instructions and schemat-
ics provided by the operator
manufacturer.
Valve operation is erratic.
The bearings need lubrication.
Lubricate bearings per the Routine Maintenance
Section.
The bearing or gear unit is broken
or damaged.
Replace broken or damaged parts.
The valve seats will not
seal.
Valve is not fully closed.
Fully close the valve. Turn the handwheel CLOCK-
WISE. DO BACK OFF
THE HANDWHEEL.
Seat or seat seals are damaged.
Lubricate seats per Routine Maintenance Section.
Replace parts.
1
Contact loacal Cameron Valves & Measurement Representative for current part number
2
Pressure locked is a condition that may exist in any double sealing gate valve when the body cavity pressure greatly exceeds line pressure. It occurs only in the
full open or full closed position and indicates that the sealing surfaces are in good condition.
