- 9 -
5.1 General
♣
Prepare gland packing and gaskets as required. (Do not reuse parts that have been used.)
5.2 Body Disassembly and Assembly (See Fig 5.1)
5.2.1 Disassembly
①
Pull out the valve from the component while taking care not to damage the accessories and pipes.
②
Remove the valve from the actuator.
③
Unfasten the gland bolt (9) from the valve and remove the gland flange (8).
④ Unfasten the cover nut (20) and remove the body (1) and body cap (2).
⑤
Remove the ball (3), and push the stem (5) to the inside of the body (1) to remove it.
⑥
Remove the seat ring (4) and gasket (31) from the body (1) and the body cap (2).
- Clean each part and check them for any damage. Prepare available parts for future repair.
- WARNING -
To prevent human injuries and damages to control system, close the block valve, remove
instrument air and signals from the valve and open the bypass valve to switch over the
pressure from the line to the bypass. Then slowly unfasten the bolts from the pipe until the
internal pressure of the body is completely released and remove the valve before
disassembling the actuator.
- WARINING -
To prevent injuries or damages to the system, remove the line pressure and remove the valve
from the line before starting disassembly.
- Warning -
Take special care not to damage the surface of ball and seat during assembly.