Bray TRI LOK, Руководство по эксплуатации и обслуживанию

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7
BRAY Tri Lok Triple Offset Valve
Operation and Maintenance Manual
match. Apply anti-seize compound to body seat
retaining cap screws (9) and install the screws
(9) inger-tight.
Verify that all four alignment marks match (body, 11.
body seat, disc seal ring and disc seal ring retainer)
and then tighten the body seat retaining cap
screws (9) evenly and irmly using a crisscross
pattern when tightening. The tightening torque
is speciied in the Table 3 (Pg. 9).
Using a suitable wrench at the end of the splined 12.
stem (5), partially open and quickly close the
disc (15) seating it irmly into the body seat (8)
a few times.
Close the valve. Tighten all the disc seal ring 13.
retainer screws (10) using a crisscross pattern.
Tighten all the disc seal retainer screws (10) to
the torque speciied in Table 3 (Pg. 9).
Re-apply lubricant to the sealing surfaces of the 14.
valve. Reinstall actuation device and test the
valve.
4.4 d
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Ing
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eplaceMent
:
Refer to the parts diagram for parts identiication
by reference numbers in parentheses.
Bray recommends that both the disc seal ring (13)
and the body seat (8) be replaced at the same time.
However, individual components are not matched
in pairs, and can be replaced separately.
CAUTION
Exercise extra care when handling the body seat
and disc seal ring to avoid damage to the sealing
areas.
The disc seal ring (13) can only be replaced in two
ways: replacing the disc seal ring (13) without re-
moving the body seat (8); or replacing the disc seal
ring (13) with the body seat (8) removed.
To remove the disc seal ring (13) without remov-
ing the body seat (8) requires the valve actuation
device be removed from the valve and the valve
lipped over to allow access to both sides of the
valve. For that reason, this procedure is not suit-
able for occasions where the disc seal ring (13)
needs to be replaced in a valve installed in the
pipeline. In addition, this procedure is not recom-
mended for large Tri Lok valves where lipping the
valve over may be more dificult than removing
the body seat (8) and installing the disc seal ring
(13) solely from the body seat side.
Disc Seal Ring replacement with the Body Seat
in the valve:
Remove the valve from the pipeline. Remove 1.
the actuator or operator from the valve.
Clean the surface of the valve, blow out all 2.
debris around the disc seal ring retainer (12)
and clean out the hex sockets of the disc seal
ring retaining cap screws (10).
Loosen up all the disc seal ring retaining cap 3.
screws (10), but leave them in the valve with
the disc seal ring retainer (12) attached to the
disc (15).
Using a suitable wrench, rotate the valve 4.
splined stem (5) counterclockwise passed
the fully open position far enough only such
that the disc is in a position that will facilitate
extraction of the disc seal ring retainer (12) and
the disc seal ring (13). Be careful not to over-
rotate the splined stem (5) to the point where
the disc seal ring (13) or disc edge (15) would
contact the body (6). Make sure the packing
gland retainer nuts (24) are tight enough to pre-
vent the valve splined stem (5) to rotate on its
own under the eccentric weight of the disc (15).
Remove the disc seal ring retaining cap screws 5.
(10) and lock washers (11), and extract the disc
seal ring retainer (12) and the disc seal ring (13).
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