Bray Triple Offset - Manual (Page 13)

11 O & M
ASME CLASS
150 & 300
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
8. Lubricate (refer to lubrication table) the sealing
surfaces of the disc seal ring (C2) and the seat (B1).
Using a suitable actuator, close and open the valve
2-3 times, only closing the valve to the point where
the disc seal ring engages with the seat. Check each
time that the disc seal ring makes full contact without
torquing into the seat. Attention should be paid in the
closing stroke that the seat does not scratch the disc
seal ring. This will allow the disc seal ring and seat
to be properly aligned.
9. Orient the valve with the seat side facing upward.
Verify that all four alignment marks (body, seat, disc
seal ring and disc seal ring retainer) are aligned.
10. Tighten the disc seal ring retainer cap screws (C5)
in the Table 3 (Pg. 12).
11. Re-apply lubricant to the sealing surfaces of the valve.
Reinstall operator or actuator and test the valve.
Disc seal ring replacement with the body
seat (replaceable) removed from the valve
This procedure follow the instructions for replacement
of the seat (B1) described above. If the old body seat
(replaceable) (B1) is to be reused, exercise extra care
when extracting it from the retaining cavity in the valve
body (A1). When using jacking bolts to extract the seat,
avoid forcing the jack screws unevenly which could
result in permanent deformation of the seat (B1). If the
old seat (B1) is to be reused, make absolutely certain that
the seat (B1) slides out of the retaining cavity easily; in
a balanced and level manner.
9.4 Bottom Flange Gasket Replacement
Refer to parts diagram for parts identification by
reference numbers. (Pg. 7)
1. If the valve is installed, remove line pressure.
2. Completely remove the bottom plate screws (G3).
Remove the bottom plate (G1) and the bottom plate
gasket (G2).
3. Clean the bearing area of residual gasket and for-
eign materials. Grease the body/bottom plate gasket
groove area.
4. Place the new gasket (G2) on the bottom plate (G1)
and install it onto the body.
5. Reinstall the bottom plate screws (G3) and using the
cross bolting technique, tighten them according to
Table 3 (Pg. 12).
1. If the valve is installed, remove line pressure.
2. Remove the bottom plug (G1) and the bottom plug
gasket (G2).
3. Clean the bearing area of residual gasket and foreign
materials. Grease the body/bottom plug gasket area.
4. Place the new gasket (G2) on the bottom plug (G1)
and install it onto the body.
5. Tighten the bottom plug according to the torque
Table 3 (Pg. 12).