| Inspection and Maintenance of Control Valves |
| Inspect and perform maintenance service to the control valve for the following: |
| - Visual the valve body, actuator & acccessories such as positioner, regulator, solenoid valve, look-up valve, booter,.. |
| - Check the function of valve are smoothly operates within its full travel scale range |
| - Check the leakage of valve as per FCI 70-2 |
| Actuator Maintenance |
| - Confirm that the marked on the control valve body and actuator |
| - Disassembly actuator and valve body |
| - Disassembly actuator and replace spare diaphargm and oring |
| - Check that there is no air leak from between the diaphragm case and diaphragm. |
| Valve Body Maintenance |
| - Confirm that the marked on the control valve body and bonnet |
| - Disassembly valve body |
| - Vísual Check the valve plug, seat & cage |
| - Repair or replace the valve plug, seat & cage |
| - Replace packing, seat gasket & bonnet gasket |
| Calibration & Final Inspection |
| - Assembly actuator and valve body |
| - Assembly positioner & accesories |
| - Calibration and Confirm that the control valve smoothly operates within its full travel scale range |
| - Final check the leakage of valve as per FCI 70-2 |
| - Hydrostatic test and check that there is no leak from the bonnet and flanges and body |
TKLD TECHNICAL SERVICE COMPANY LIMITED