Bray Triple Offset - Manual (Page 6)

A D i v i s i o n o f B r a y I n t e r n a t i o n a l , I n c .
The Ultimate Critical Service Triple Offset Valve
O p e r a t i o n a n d M a i n t e n a n c e M a n u a l
4 O & M
Notes for Table 1
s
s
s
face of the valve body.
3.0 Installation
1. Tri Lok is designed to be installed between ASME
is open, a portion of the disc may protrude into the
and some gate sizes, the open disc may protrude into
the pipe on the seat side of the valve. Adjacent piping
must be large enough to allow the open disc to clear
the pipe.
Table 1 shows the minimum allowable pipe ID. In
general, Class 150 valves will clear Schedule 40 pipe,
and Class 300 will clear Schedule 80 pipe without
interference.
2. The valve closes with clockwise rotation of the stem,
and opens with counterclockwise rotation.
!
CAUTION
Avoid uncontrolled rotation of the disc beyond fully-
open position (counterclockwise) as this could damage
the sealing surfaces.
torque and best sealing conditions, install the valve
with the stem on the upstream (pressure side) of the
installation. The valve tag is marked with an arrow
4. Whenever possible, install with the stem in horizontal
position with respect to the ground. If this installation
is not possible, orient the stem at an inclined angle,
with the actuator above the horizontal centerline. This
will prevent debris from accumulating in the bearing
area. With the valve stem horizontal, the weight of
the disc will be supported along the full length of the
bearing journals; thus minimizing operational wear.
5. Flange gaskets should conform to the requirements
of ASME B16.20 (supersedes API Standard 601) for
Flexitallic ® CG or CGI series, conforming to ASME
B16.20 are recommended.
( Flexitallic ® is a registered trademark of The FDS Group)
6. When bolting the valve into the line, use standard
bolting torque as recommended by applicable pip-
ing standards. The valve body seat (replaceable) is
Table 1
Minimum Allowable Pipe ID for Tri Lok Installation
Valve/Pipe
Size
Minimum Pipe ID
Class 150 Class 300
In mm In mm In mm
3 80 2.3 51 2.3 51
4 100 3.3 78 3.3 78
6 150 5.3 128 5.1 121
8 200 7.0 172 6.8 165
10 250 8.9 221 8.9 219
12 300 10.9 270 10.9 277
14 350 12.1 300 11.6 294
16 400 14.1 350 13.5 335
18 450 15.9 392 15.3 381
20 500 17.7 450 17.1 427
24 600 21.5 540 21.1 267
30 750 26.9 684 26.7 677
32 800 29.1 740 – –
36 900 33.1 841 32.6 828
40 1000 36.6 929 – –
42 1050 38.7 982 37.5 951
48 1200 44.6 1134 43.2 1096