Flowserve E818 Series - Manual (Page 3)

WCAIM2057 E818/828 Series Fugitive Emissions 150# and 300# Flanged 2" - 8" Two-Piece Ball Valves 3
Flow Control Division
Worcester Controls
5. Reassembly:
Refer to exploded view illustration on page 5 for proper
reassembly.
NOTE: Care must be used when handling graphite stem seals,
thrust bearings, and body seals. These parts can be easily
damaged by squeezing the O.D. of the seal. Parts are to be
handled on the flat surfaces rather than the O.D. These parts will
not work if they are cracked or broken. Light flaking of the
material is acceptable. If resistance is encountered when
installing stem seals over the stem, use follower to gently push
the stem seal down.
Valves with a pressure relief hole in the ball (V3) must be
reassembled and installed with the hole upstream (end connector
side) to ensure that cavity relief is upstream when valve is closed.
Any valve with the 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.
For all valves, lightly lubricate the ball, seats, body seal, stem
seal(s), and thrust bearing, with a lubricant compatible with the
media being handled, except for valves with V38 option, 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.
2"-8" Two-Piece Valves:
a. Insert new seat in body. Make sure seat rests firmly on back
surface of recess.
b. Place the thrust bearing on the stem.
c. Insert the stem and thrust bearing into the body through the
ball cavity.
d. Install the following parts over the stem and into the packing
chamber in this order (refer to packing assembly drawings
Figures 1 and 2 on page 4):
For “T” Packing - Filler ring, 629 seal, lantern ring-T,
three Chevron packing rings, and follower T.
For “G” Packing - Two graphite packing rings, lantern
ring-G, two graphite packing rings, and follower-G.
e. Install gland plate over stem.
f. Valves with “T” and “G” packing both use twelve Belleville
washers. The arrangement of the washers is different for each
type of packing (refer to packing assembly drawings Figures 1
and 2 on page 4):
For “T” Packing - Use three sets of two washers on each
bolt. Each set consists of two Bellevilles opposing each
other with their ODs touching.
For “G” Packing - Use three nested Bellevilles opposing
three nested Bellevilles on each bolt. The middle two will
have their ODs touching.
g. Lubricate the gland bolt threads with an anti-galling agent,
such as Christo-Lube MCG-111. Install gland bolts/Bellevilles
through the gland plate and thread them into the body.
Tighten the gland bolts per Section C - Maintenance. Be
certain that the bolts do not bind - this can result in improper
packing loading.
CAUTION: Tightening the gland bolts can cause the stem to
be pushed into the ball cavity. The stem must either be
fixtured to prevent this, or be worked back into position
when assembling the ball and seats into the body.
h. For 2" valves, add handle (if used) and tighten the handle set
screws.
For 3"-6" valves add stop, and handle assembly (if used) and
tighten handle retaining bolt.
i. With valve in closed position (stem flats going across
pipeline), carefully insert ball into body so that stem slot
engages tang on stem.
j. Install and make sure body seal rests squarely in seal surface
of body. Insert new seat in cavity of end connector.
CAUTION: If the body seal is installed on the end connector,
it will be damaged.
k. Carefully place the end connector into the body using 2 or 3
body studs to align the mid-flange holes. When correctly
located, strike the end connector with a mallet to push down
the end connector further into the body. Tighten all body nuts
to the following torques:
Pressure checking of valve is desirable if practical.
6. When ordering parts, please provide the part name and the
following information as found on the valve nameplate:
a. Valve Size and Style and Revision Number
Examples: 3" - E818 6 66 T 150 - R3 Stem
6" - EAF828 4 66 RZ 300 - R3 Ball
OR
b. 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: 6" - E828 6 66 T 300 P2577 Ball
Torque (Ft-Lbs)
Stainless Steel Studs Carbon Steel Studs
Valve Size 818-150# 828-300# 818-150# 828-300#
2" 33 33 34 34
3" 33 82 34 87
4" 57 82 60 87
6" 82 170 87 178
8" 170 214 178 253