Flowserve TB59 - Manual

CAUTION: Flowserve recommends that all product which must be
stored prior to installation be stored indoors, in an environment
suitable for human occupancy. Do not store product in area where
exposure to relative humidity above 85%, acid or alkali fumes,
radiation above normal background, ultraviolet light, or
temperatures above 120˚F or below 40˚F may occur. Do not store
within 50 feet of any source of ozone.
A. INSTALLATION
1. Valves may be installed for flow or vacuum in either direction. Use
care to exclude pipe sealants from the valve cavity.
2. For weld-end style valves (SW, BW):
NOTE: Prior to welding or brazing, THOROUGHLY CLEAN ALL
JOINT SURFACES to prevent contamination.
a. Tack weld valve in place.
b. With the valve open, remove all of the studs and remove the
center section from the valve. Close valve and remove the ball,
seats and body seals.
Return body back to its original position and temporarily secure
it with two studs diagonally opposite each other.
c. Proceed to weld valve inline (when gas welding, do not play
flame on valve body).
d. Allow valve to cool, remove two studs and reassemble the
valve. Note that all valves with fluoropolymer body seals are
reassembled using the original white fluoropolymer body seals.
e. Tighten and torque the studs evenly and diagonally opposite
each other, alternating in a criss-cross pattern. Use torque
figures below:
B. OPERATION
1. The operation consists of turning the stem ¹ ₄ turn clockwise to
close and ¹ ₄ turn counter-clockwise to open. When stem flats or
stem groove is in-line with the pipeline, the valve is open.
2. These valves will provide bubble-tight shutoff when used in
accordance with Worcester’s published pressure/temperature
chart.
3. It is not good practice to leave a ball valve partly open (throttling
operation) without knowledge of the pressure drop and flow at
that position.
4. As shipped from the factory, valves (except oxygen prepared
(V20, V33 or prefix code “X”), and valves with V38 or V46
options) contain a silicone-based lubricant. This is for break-in
purposes, and may be removed if it is objectionable for a
particular application by disassembling and solvent washing.
Lacquer thinner will remove the lubricant.
5. Media which can solidify, crystallize or polymerize should not be
allowed to stand in ball valve cavities.
6. Torque Requirements - Operating torque requirements will vary
depending on the length of time between cycles, line pressure,
type of valve seats, and the media in the system. For a detailed
analysis of valve torque requirements, see Worcester’s Actuator
Sizing Manual.
C. MAINTENANCE
If seepage is noted at stem, tighten remaining nut ¹ ₃ turn at a time
until seepage stops.
CAUTION: Excessive tightening causes higher torque and shorter
stem seal life.
Tank Bottom Valves: 2" – 4" TB59
Installation, Operation and Maintenance Instructions
STAINLESS STEEL STUDS
Bolt Diameter in-lb ft-lb
9/16" 682-730 57-61
5/8" 972-1020 81-85
3/4" 1402-1450 117-121
1
Worcester Controls 06798-E