Installation and Maintenance Manual
Triad Series Ball Valves
Date: August 2020 / Page 3 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
Material for the bore alignment tool should be made from a
material softer than 300 Series S.S. so that it will not inadvertently
scratch the valve end cap or ball. Suggested materials: aluminum
T6061. Acetal or other suitable hard polymer/plastic material.)
Secure the tab washer with one ear bending up; Place the
handle (25) onto the stem, on top of the stem gland nut (26A);
Secure the handle (25) with the stem lock nut (26).
3”-4” VALVE ASSEMBLY PROCEDURES:
Put washer protector (11B), thrust washer (12) and stem bearing
(13) on valve stem (5) and slide the stem Into the stem hole on
valve body (1):
Slide the stem packing (14) onto the stem until it is seated against
the upper bottom of the stem hole;
Put packing protector (IlA), then packing gland sleeve (15) onto
the stem, on top of the stem packing;
Install packing gland (16) on top of the packing gland sleeve,
lightly tighten to secure packing gland with packing gland bolt
(17).
Install stop housing (20), secure stop housing with housing bolts
(21) hand tight. Install travel stop (22) and snap ring (30):
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.
Turn the stem to the closed position (wrench flats on stem per-
pendicular to pipeline);
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);
Install 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.
Cycle the valve slowly several times. By cycling slowly, the seats
will conform to the ball. A fast turning motion initially may dam-
age the seats before they have a chance to form the proper seal:
Tighten the packing gland bolts (17) gradually until there is
no leakage through the packing. Over-tightening can result in
excess torque and accelerated wear.
Install handle (25) on to the valve stem and secure the handle
with handle bolt (27).
Table 1
Tightening torques for end cap screws
Valve Size
11
⁄22”
33
⁄44” 1” 1-
11
⁄44” 1-
11
⁄22” 2” 3” 4”
Bolt Torque (lb-in)
14 0 210 210 550 550 550 996 996
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