Flowserve 45 Series Worcester Controls - Manual (Page 4)

Flow Control Division
Worcester Controls
Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform its intended function
safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications under a wide variety of industrial
service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings for all possible applications. The purchaser/user must therefore
assume the ultimate responsibility for the proper sizing and selection, installation, operation, and maintenance of Flowserve products. The purchaser/user should read and understand the Installation
Operation Maintenance (IOM) instructions included with the product, and train its employees and contractors in the safe use of Flowserve products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative purposes only and should not be considered certified or as a guarantee of
satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect to this product. Because Flowserve
is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice. Should any question arise concerning
these provisions, the purchaser/user should contact Flowserve Corporation at any one of its worldwide operations or offices.
For more information about Flowserve Corporation, contact www.flowserve.com or call USA 1-800-225-6989.
FLOWSERVE CORPORATION
FLOW CONTROL DIVISION
1978 Foreman Drive
Cookeville, Tennessee 38501 USA
Phone: 931 432 4021
Facsimile: 931 432 3105
www.flowserve.com
© 2003 Flowserve Corporation, Irving, Texas, USA. Flowserve and Worcester Controls are registered trademarks of Flowserve Corporation. 18484-F 9/03 Printed in USA
4. Reassembly:
NOTE: Valves with a pressure relief hole in the ball (V3) must be re-
assembled with the hole upstream when valve is closed, to ensure that
cavity relief is upstream. Any valve with this V3 option will have an
arrow on the body pointing downstream. This arrow is stamped on the
body or on a metal tag welded to the body.
a. Lightly lubricate the ball, seats, body seals, seat back seals (if
used), stem seal(s), stem seal protector (if any) and thrust bearing
with a lubricant compatible with the media being handled, except
for valves with V20, V33 or V38 options which are assembled dry.
White petroleum jelly is a good general-purpose lubricant. For
oxygen prepared valves (prefix code “X”) use a PTFE-based
lubricant such as Fluorolube S-30 or equivalent.
For valve repair kits with “A” or “G” seats, the filled metal seats
will be lubricated at the factory. If they are not, they should be
lubricated as noted in paragraph section B.4 and also as stated
above. DO NOT operate a newly rebuilt valve using filled metal
seats without break-in lubricant. The seat back seals will be pre-
assembled to the seat backs.
b. On 3", 4" and 6" valves, reinstall stem centering washer(s) into the
recesses in the body. When only one washer is used, it goes
inside recess at top of the body and under the stem seal(s).
c. Place new thrust bearing on stem and insert through body cavity.
The thrust bearing can be distinguished from the stem seals by
the darker color of the 25% filled fluorocarbon used in the thrust
bearing. Thrust bearings and stem seals are the same color and
size, and are interchangeable on 2
1 /
2
" size valves only. For valves
with graphite stem seal and thrust bearing, the stem seal is
metallic sliver gray and thicker than the thrust bearing. See
paragraph section A.3 for handling of graphite parts.
d. Install new stem seal(s) over the top of the stem and down into the
recess in the top of the body. The follower is installed on the top of
the stem seal(s). Place stop (or spacer) onto the valve stem.
If a graphite stem seal is used and does not easily seat into the
body recess, use the follower to gently push it in place. Add new
Belleville washer, concave side up over follower (Belleville
washer is used with graphite stem seal only).
For valves with V51 high cycle stem packing option, the thrust
bearing and stem seals are the same size and color, and they are
interchangeable. A stem seal protector of PEEK material and tan
in color is also used and installed over stem seals.
Two Belleville washers are used with this V51 option and also
with automated valves that have a graphite stem seal, and they
are installed over the follower with the larger diameter sides
touching each other. The stem spacer is not used.
e. Replace retaining nut onto stem. Using handle or wrench to
prevent stem rotation, tighten the retaining nut to fully compress
packing, then back off
1 /
6
turn. Excessive tightening causes higher
torque and shorter stem seal life. For valves with graphite stem
trim tighten retaining nut to fully flatten Belleville(s), then back off
1 /
6
turn.
f. Replace handle assembly (wrench block and wrench extension)
and tighten hex head screw (manual valves only).
g. With the valve in the closed position, (stop plate pointer and/or stem
flats or groove going across pipeline) install ball, new seats, seat back
seals (if any), and seat retainer(s) (if used). Open the valve and install
new body seals or gaskets. The optional “S” gasket body seals (2" and
2
1 /
2
" sizes only) are installed with the wide flanges facing inward.
Before putting the center section back between the pipe ends, make
sure that the seat back seals (if any) are located properly inside the
seat groove. If not, seal damage and valve leakage will result.
For 2" AF59 valves, insert centering rings into pipe ends before
installing center section of valve.
h. Place center section between pipe ends and replace bolts or studs
and torque to figures in paragraph section 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 from the valve stop plate or welded on
nameplate:
1. Valve size, style and revision number:
e.g., 3" 45 46 RT SE R2 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:
e.g., 4" 4566 RT SW TO914 Ball.
The terminology shown in the parts listings on the previous page
is standard.