4
Notes for Table 1:
Minimum allowable ID of pipe with recommended clearances (per API 609) have been calculated by
a.
adding the minimum recommended diametric clearance to the larger chordal dimension of the disc at
the valve face.
This table assumes that the valve is perfectly centered in the pipe langes.
b.
A minimum of 1/16” (1.6 mm) thick gasket is used between the pipe lange and the face of the valve body.
c.
When using a pipe whose ID is smaller than the recommended minimum allowable ID of pipe with adequate
d.
clearance, a spacer of appropriate thickness and a proper gasket could be used at the lange face to clear the
disc. Alternately, for butt-welded pipe langes, a 45 degree chamfer of required size to clear the disc edge
could be provided. Chamfering which would cut into the internal weld at the lange ID is not allowed in
slip-on pipe langes.
BRAY Tri Lok Triple Offset Valve
Operation and Maintenance Manual
4.0 M
aIntenance
WARNING
Reasonable precaution should be taken before
beginning any work on the valve.
Protective clothing, as required by speciic line luid
and appropriate safety codes, should be worn.
Depressurize the line and close the valve before
removing the actuation device from the valve.
Depressurize the line before loosening any pack-
ing gland nuts.
Do not pressurize the line without an actuation de-
vice properly installed and working on the valve.
CAUTION
The Tri Lok valve must be in closed position to
be removed from the line. Otherwise, the sealing
edge could be damaged.
1) When replacing the body seat and/or disc seal
ring with the valve in the line in dead-end instal-
lation, or with the piping on the body seat side
removed, depressurize the line and marginally
crack-open the disc before loosening any of the
valve trim fasteners.
2) Begin all work on a valve that has been removed
from the line by cleaning the valve, removing
any grit or scale. When handling the valve, care
should be taken not to scratch the disc seal ring,
the body seat, and gasket faces on both sides of
the valve.
3) Replacement body seats, disc seal rings, and other
parts are available from authorized distributors.
Contact your Bray distributor or sales representa-
tive for details on price and delivery.
4.1 s
teM
s
eal
r
Ing
r
eplaceMent
:
Refer to the parts diagram for parts identiication by
reference numbers in parentheses. ( Pg. 13 )
1) If the valve is installed in the line, depressur-
ize the line. Remove operator or actuator from
the valve. Remove socket head cap screws and
lock washers (25). Remove mounting bracket or
mounting plate (26), depending on valve size.
Note assembly positions of the operator or actua-
tor and the mounting hardware for subsequent
reinstallation.
2) Remove packing gland retainer nuts (24) and
lock washers (23). Remove gland retainer (22),
!
!
