Flowserve Cryogenic Three-Piece Bodied Extended Bonnet Ball Valve - Manual (Page 4)

4 Cryogenic Three-Piece Bodied Extended Bonnet Ball Valve: Installation, Operation and Maintenance 17646-L
d. Add two new Belleville washers with outer edges touching
and the retaining nut and tighten stem assemblies
following procedures in Maintenance, Section III.A.3.
For Rev. R7 actuated valves, add four new Belleville
washers, (two pairs of washers with outer edges
touching) and self-locking stem nut. Tighten nut following
procedures in Maintenance, Section III.A.3.
e. Adjust stem so arrow on the top stem flat points
downstream when valve is in the open position (hole in
ball is upstream when the valve is in the closed position).
For Cryogenic-Diverter Valve (90° only) disregard arrow
on the top stem flat as stem orientation is not necessary.
For Cryogenic-Diverter Valve (180° only) handle and
arrow on top stem flat will point to port to which flow is
diverted.
f. For all manual valves, replace stop, handle, lockwasher
and handle nut. For Rev. R6 actuated valves, replace
lockwasher and top nut.
8. Place the ball (see note below) in the valve inserting the pin
extending from the bottom of the stem tang into the slot
machined into the stem slot of the ball. The relief hole in the
face of the ball is on the upstream side of the valve, when in
the closed position, to insure that cavity relief is upstream.
NOTE: For diverter valves, install ball as follows:
V1 (90° Valves) – With handle and/or stem flats in line with
body main axis, viewed from bolt head side (normally
upstream) one ball port is to the right, one is down, and the
other is on opposite end of valve.
V2 (180° Valves) – Using same convention as V1, one ball
port is down and the other is on opposite end of valve.
9. Open ball and install new seats, which have been specially
prepared by Flowserve for cryogenic service.
10. Install new gaskets and finish valve assembly per Section I.C.,
steps 6.a, b, c, d, and e on pages one and two of this manual.
11. Cycle valve several times to ensure displacement of cryogenic
lubrication on seats.
Flow Control Division
Worcester Controls