Flowserve TB59 - Manual (Page 3)

06798-D Tank Bottom Valves: 2"–4" TB59 Installation, Operation and Maintenance 3
g. Place center section between pipe end and tank bottom flange,
then replace body studs and nuts and torque to figures in
paragraph A.2.e.
After the valve is assembled it should be cycled a few times to
ensure that the valve operates smoothly with no chattering of the
ball. The normal operation is an initial high torque to “break”
from the closed position to a smooth running lower torque mid-
cycle, to a high torque at the end of the 90° cycle or open
position. The torque is similar when closing.
When ordering parts, please provide the part name and the following
information, as found on the valve nameplate.
1. Valve Size, Style and Revision Number:
Example: 3" TB59 66RTSE RO STEM
2. Valve size, style and five-character code, known as a “P” number,
“T” number, “C” number, or similar number, the designation for a
non-standard product:
Example: 4" TB59 66RTSW T0244 Ball
The terminology shown in the parts listing below is standard.
Flow Control Division
Worcester Controls
Retaining Nut
Belleville Washers (2)
Follower
Stem Seal Protector
Stem Seals (3)
Centering Washer
(not used on 2" valves)
Seat (2)
Seat Retainer
(not used on 2" valves)
Body Seal (2)
Thrust Bearing