Bray Triad Series - Manual (Page 3)

Installation and Maintenance Manual
Triad Series Ball Valves
Date: August 2011 / Page 3 of 7
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A Subsidiary of BRAY INTERNATIONAL, Inc.
FLOW-TEK, Inc. Tel: 832.912.2300 © 2011 Flow-Tek, Inc.
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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.
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 pack-
ing gland bolt (17).
Install stop housing (20), secure stop housing with hous-
ing 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
perpendicular 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
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.
Cycle the valve slowly several times. By cycling slowly,
the seats will conform to the ball. A fast turning motion
initially may damage 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 1/2” 3/4” 1” 1-1/4” 1-1/2” 2” 3” 4”
Bolt Torque (lb-in) 140 210 210 550 550 550 996 996