Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves Series
Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves
Series
13
3.7.
Insert the lower shaft of the ball into the lower radial bearing. Prior to insertion, slightly incline the
ball away from the seat to allow it to easily engage with the seat. Ball insertion should be done very
carefully, with the ball port in the open orientation. Ensure that the ball is fully seated on the lower
bearing. To allow easier insertion, tilt the ball slightly from side to side. Avoid pressing on the seat
with the ball during insertion. After insertion, the ball will be slightly inclined.
3.8.
Use the stem to bring the ball into the upright position and to energize the seat springs. Put the
centering plate onto the stem with the radial bearing facing down. While holding the plate with one
hand, pull the stem toward the seat with the other, energizing the seat spring. While holding the ball
in the upright position, place the centering plate down into the body, ensuring that it is thoroughly
seated.
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2
3
WARNING: Assemble the valve only with the ball in its open position.
After assembling the ball, its drive flats shall be perpendicular to the pipeline.
