Bray Triad Series - Manual (Page 2)

Installation and Maintenance Manual
Triad Series Ball Valves
Date: August 2011 / Page 2 of 7
®
A Subsidiary of BRAY INTERNATIONAL, Inc.
FLOW-TEK, Inc. Tel: 832.912.2300 © 2011 Flow-Tek, Inc.
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disassembly and solvent washing, if it is objectionable
for a particular application.
6. DISASSEMBLY FOR STEM AND SEAL REMOVAL:
1. Remove flange connections and lift valve from line
for servicing.
NOTE: Care should be taken to avoid scratching or
damaging mating faces. The valve should be ad-
equately supported and in the open position before
beginning.
2. Loosen handle set screw and remove handle and
stop plate. Next, remove gland nuts, gland flange
and gland.
3. Remove body end cap screws, using proper wrench
size. Lift off body end. One seat should come out
with body end.
4. Repeat the removal procedure for the other flange
end. Take out other seat.
5. To remove the ball, rotate the stem so ball is fully
closed. Lift the ball from body, using a strap and lift
device if necessary. NOTE: Extreme caution should
be taken to avoid damage to the ball.
6. The stem must be removed from inside the body - a
tap on the top of the stem should loosen it. The thrust
washer should come out with the stem. Then remove
the stem packing.
7. VISUAL INSPECTION:
Clean and inspect metal parts. It is not necessary to replace
the ball and stem unless the seating surfaces have been
damaged by abrasion or corrosion. Replacement of all
soft parts is strongly recommend whenever the valve is
disassembled for reconditioning. This is the surest protec-
tion against subsequent leakage after valve assembly.
The replacement parts can he ordered in kit form.
NOTE: The valve may be assembled and operated dry
where no lubricants are allowed in the system; however,
a light lubrication of mating parts will aid in assembly
and reduce initial operating torque. Lubricant used must
be compatible with the intended line fluid.
ASSEMBLY:
½”-2” VALVE ASSEMBLY PROCEDURES:
Hold the body in a vise firmly enough so it will not move
but do not crush it.
Put washer protector (11B) and thrust washer (12) on
valve stem (5) and slide the stem into the stem hole in
valve body (1);
Slide the stem packing components (14) onto the stem
until it is sealed against the bottom of the stem hole;
Put packing protector (11A). then packing gland sleeve
(15) onto the stem, and top of the stem packing;
Turn the stem until the stem flat is parallel to the port
centerline (so that the ball can fit onto the stem):
lnstall one seat (4) and two body seals inside an end
cap (2), make sure the spherical curvature side of the
seat will face the ball;
Install the end cap (2) with cap screws (9) and tighten
screws to the values indicated in Table 1.
Rotate the stem to the closed position and install the ball
(3) inside the valve body. The stem flats will fit into the
slot on top of the ball;
Turn the stem so that the ball is in the open position (the
ball will not fall out of the valve);
lnstall the second seat (4) and two body seals inside the
remaining end cap (2), make sure the spherical curvature
side of the seat will face the ball;
Install the end cap (2) with cap screws (9) and tighten
screws to the values indicated in Table 1.
Put Belleville washer (13) together in series mode (bot-
tom Belleville washer curve facing up, the top Belleville
washer curve facing down). and then place them onto
the stem, on top of the packing gland sleeve;
Put tab washer (19) on top of the Belleville washer and
tighten the stem gland nut (26) onto the stem to the re-
quired stem gland nut torque value as specified in the
chart. (Note: The use of a bore alignment tool, about
1.0 mm I0.04 inch) less than the internal diameter of