Flowserve TX2 Triple Offset High Performance Butterfly Valve IOM - Manual (Page 15)

Flow Control Division
15
14.1.6. Position the seal o-ring on the disc, then place the seal ring onto the disc with the larger
diameter of the outer radius edge on the side of the disc hub.
14.1.7. Place the seal ring retainer onto the disc. Insert the lock washers and hex-socket cap
screws into the seal ring retainer and lightly tighten them.
14.1.8. Turn the disc clockwise into the closed position, then tighten the hex-socket cap screws
fully.
14.1.9. Insert the packing retainer and packing rings into the drive side packing gland.
14.1.10. Insert the studs into the threaded holes in the drive side packing gland.
14.1.11. Install the packing follower and tighten it into position with the hex nuts. Do not tighten
one hex nut further than the other.
14.1.12. Install the blind flange with gasket and tighten it into position with the hex-socket cap
screws.
14.1.13. The valve is now ready for actuator mounting. The disc is held quite securely in
position, so the actuator may be pushed onto the shaft then moved to the desired fail position.
Please consult the actuator’s literature for further details.
14.2. Disassembly
14.2.1. Place the valve on a bench or other suitable working surface with the drive shaft side of
the valve up. Remove the actuator and actuator bracket from the valve.
14.2.2. Separate the packing follower by removing the hex-nuts from the studs, then remove the
studs.
14.2.3. Remove the packing using a flexible screw-hook.
14.2.4. Remove the packing retainer, being careful not to damage the finish of the packing gland
bore or the drive shaft.
14.2.5. Open disc at 90
°, then separate the seal ring retainer, seal ring, and o-ring from the disc.
14.2.6. Close the disc, and support the opposite side of the disc to prevent damage to the shafts
while drilling out the pins.
14.2.7. Pull out the stem and remove the disc from the body. Disassembly is now complete.