rotork gp series, Руководство по обслуживанию

Страница: 30 / 80

Installation, Commissioning and Maintenance Manual
30
ID FAILURE POSSIBLE CAUSES CORRECTIVE MEASURES
1 Incorrect valve position • Fault of pipeline valve • Consult the valve manufacture’s documentation
2 Incorrect indication of valve position • Incorrect signal from limit switches
• Check limit switches position (according
instructions reported in the job specific
documentation)
3 Incorrect movement
• Irregular supply of operating medium
• Verify the supply pressure and adjust as
necessary
• Worn parts • Contact Rotork Fluid Systems
• Fault in control panel equipment
(if present)
• Contact Rotork Fluid Systems Customer Service
• Fault of pipeline valve • Consult the valve manufacture’s documentation
4 Valve stroke not fully completed
• Insufficient gas flow • Increase gas supply flow
• Incorrect assembly between actuator
and valve
• Perform assembling according to INSTALLATION
ON VALVE, page 10
• Valve blocked • Consult the valve manufacture’s documentation
• Stop bolts wrong setting
• Adjust stop bolt setting following instructions in
ANGULAR STROKE SETTING, page 17
5 Leakages
• Stop bolts wrong setting
• Adjust stop bolt setting following instructions in
ANGULAR STROKE SETTING, page 17
• Worn seals
• Replace seals according instructions reported in
PM-GP-006, PM-GP-007
6
Actuator moves too fast
• No pressure on pipeline • Restore pipeline pressure
• Supply pressure greater than allowed
range values
• Verify the supply pressure and adjust as
necessary
7 Actuator moves too slow
• Fault on pipeline valve (valve hardened) • Consult the valve manufacture’s documentation
• Supply pressure lower than allowed
range values
• Verify the supply pressure and adjust as
necessary
• Possible internal undue friction • Contact Rotork Fluid Systems Customer Service
8 Loss of power
• Inadequate supply pressure
• Ensure that the supply pressure is above the
minimum operating pressure of the actuator
and that the output torque produced at supply
pressure exceeds the required valve torque.
• Leakage from cylinder
• Replace seals according instructions reported in
PM-GP-006, PM-GP-007
For other problems, please contact Rotork Fluid Systems Customer Service.
15.0 Troubleshooting
A4 US
US
A4
US A4
US
A4