BRAY Tri Lok Triple Offset Valve
Operation and Maintenance Manual
3
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.
Over-rotation into closed position (clockwise) is not
possible, as the disc will stop against the seat in the
normal operating manner.
3) To beneit from the most favorable low operat
-
ing 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 indicating the preferred direction
of the low in the line.
4) Whenever possible, install the Tri Lok with the
stem in horizontal position with respect to the
ground. If this installation is not possible, Bray
recommends orienting the stem at an inclined
angle with respect to the ground,with the actuator
above the horizontal centerline. This will prevent
process debris from accumulating in the stem
bearing area. In addition, with the valve stem
horizontal, the weight of the disc will be supported
along the full length of bearing journals. These
positions will minimize operational wear.
5) Flange gaskets should conform to the require-
ments of ASME B16.20 (supersedes API
Standard 601) for ASME B16.5 langes. Spiral
wound gaskets, such as Flexitallic® CG or CGI
series, conforming to ASME B16.20 are recom-
mended.
6) When bolting the valve into the line, use standard
bolting torque as recommended by respective
piping standards. The valve body seat is inde-
pendent of the lange bolting, hence additional
force from the lange bolts is not required.
!
Valve Size
Pipe Size
In (mm)
Min. Pipe ID.
Class 150
In (mm)
Min. Pipe ID.
Class 300
In (mm)
Nom. Pipe ID.
Schedule 40
In (mm)
Nom. Pipe ID.
Schedule 80
In (mm)
Nom. Pipe ID.
Schedule 100
In (mm)
3 (80)
2.0 (50.8)
2.0 (50.8)
3.1 (77.9)
2.9 (73.7)
-
4 (100)
3.1 (77.7)
3.1 (77.7)
4.0 (102.3)
3.8 (97.2)
-
6 (150)
5.0 (127.8)
4.8 (120.7)
6.1 (154.1)
5.8 (146.3)
-
8 (200)
6.8 (171.7)
6.5 (164.6)
8.0 (202.7)
7.6 (193.7)
7.4 (189.0)
10 (250)
8.7 (220.5)
8.6 (218.9)
10.0 (254.5)
9.6 (245.2)
9.3 (236.6)
12 (300)
10.6 (270.0)
10.9 (276.9)
11.9 (303.2)
11.4 (289.0)
11.1 (281.0)
14 (350)
11.8 (300.0)
11.6 (293.9)
13.1 (333.3)
12.5 (317.5)
12.1 (308.0)
16 (400)
13.8 (349.5)
13.2 (335.0)
15.0 (381.0)
14.3 (363.6)
13.9 (354.0)
18 (450)
15.5 (392.4)
15.0 (380.7)
17.0 (428.7)
16.1 (409.6)
15.7 (398.5)
20 (500)
17.7 (450.3)
16.8 (427.2)
18.8 (477.9)
17.9 (455.6)
17.4 (442.9)
24 (600)
21.1 (539.9)
20.7 (526.5)
22.6 (574.7)
21.6 (547.7)
20.9 (531.8)
t
able
1.
M
InIMuM
allowable
pIpe
Id
for
t
rI
l
ok
InstallatIon
-
s
tandard
pIpe
Id
gIven
for
reference
.
*See Notes Pg. 4
