Installation and Maintenance Manual
Triad Series Ball Valves
Date: August 2020 / Page 2 of 7
FLOW-TEK, Inc. Tel: 832.912.2300
© 2020 Flow-Tek, Inc.
8323 N. Eldridge Pkwy #100 Fax: 832.912.2301
Houston, Texas 77041 www.flow-tek.com
NOTE: Care should be taken to avoid scratching
or damaging mating faces. The valve should be
adequately 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 dam-
aged by abrasion or corrosion. Replacement of all soft parts
is strongly recommend whenever the valve is disassembled for
reconditioning. This is the surest protection 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 remain-
ing 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 (bottom Bel-
leville 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 required stem gland
nut torque value as specified in the chart. (Note: The use of a
bore alignment tool, about 1.0 mm 10.04 inch) less than
the internal diameter of the end cap and ball, inserted through
the end cap and ball will prevent the ball from turning as the
stem gland nut is lightened on the stem.
To Next Page
Loading...
Need help?
General