1. Inspect the sealing surface of the valve body for nicks and scratches that will prevent the shims from sealing.
2. Turn the V-ball to the closed position and
install the appropriate number of shims
(Key 20) from table 3. For the bi-directional metal ball seal, use a 1/1000-inch or 1/4 mm thick test shim. A piece of paper would be a suitable alternative. Place the test shim across the ball face.
3. Check for nicks and scratches on the ball seal, sealing surface, and backup ring. Install the ball seal and the backup ring on top of the shim seals. If damage was detected on any of the components, the damage should be turned away from the V-ball. Install the bi-directional ball seals, to ensure proper orientation, use the marks made in step number 5 of the removal.
4. Metal and TCM ball seals:
4.1 Install seal protector ring (key 22) on the ball seal and shim seals (key 23 and key 20).
4.2 Secure the seal protector ring and the
ball seal to the valve body by threading
and tightening the capscrews. To obtain the closest ball deflection to zero, add and remove shim seals (key 20).
4.3 Zero ball seal deflection is when a .005
inch or 0.13 mm shim causes the seal to
be broken between the v-notched ball
and the ball seal. The parts must be
secure or an inaccurate zero will result.
5. Bi directional metal ball seals:
5.1 Install seal protector ring (key 22) on the ball seal and shim seals (key 24 and key 20).
5.2 Secure the seal protector ring, ball seal and shims (key 24 and 20) by threading and tightening the capscrews (key 19).
5.3 Zero ball seal deflection can be tested by removing the 1/1000 of an inch or .025 mm thick test shim from under the ball seal. If this is possible, remove the seal protector ring, the ball seal, and the back-up ring.
5.4 To check the zero deflection, remove one shim, and assemble the parts. Attempt to remove one 1/1000 inch or 0.025mm shim. If the shim is neither to tight or to loose, then zero deflection is obtained.
6. Once zero deflection is obtained remove:
6.1 The seal protector ring
6.2 The ball seal
6.3 The back up ring (if the bi-directional metal seal is used)
6.4 The number of seals indicated in table 4.
6.5 For the bi-directional metal ball seal leave at least one shim seal in the body.
7. Install the ball seal and the backup ring, if one is used.
8. For metal ball seals, install one shim seal (key 20) on top of the metal ball seal.
9. Install 0-ring (key 24), if used, into the body.
10. Ensure that the ball seal is centered on the V-ball. For the bi-directional ball match orientation marks that were made in step 5 of the removal section.
11. Install the seal protector ring (key 22) and screw the cap screws and washers, (if used) to secure the body.