Service Manual
BRAY Resilient Seated BFV
Operation and Maintenance Manual
20
Appendix F
Disassembly/Assembly Instructions
Series 31U Resilient Seated Buttery Valves
Disassembly –
1. Remove the handle, gear operator, or power actuator from actuator mounting ange.
2. Remove the “Spirolox”® retaining ring and the two C-ring stem retainers from the stem hole.
3. Then remove the top stem bushing and seal, upper stem and retaining rod.
4. Remove the disc from the seat, protecting the disc edge at all times.
5. The upper and lower stem bearings will remain in the valve behind the seat.
Note: The seat is bonded to the body and is not easily eld replaceable.
Please contact your local Bray representative for seat replacement.
Assembly –
1. Install a light coating of silicone or grease on the I.D. of seat.
2. Insert the lower stem inside the disc before inserting the disc into the seat.
3. Insert the disc into the seat by lining up the disc holes with the stem holes of the seat.
4. Line up the disc using a T-Bar (Allan key style)
5. With a downward pressure and rotating the T-Bar back and forth, push the lower stem until the
lower stem touches the bottom of the body stem hole recess.
Note: The broached double “D” ats in the disc must be toward the bottom of the valve body.
6. Make certain that when pushing the stem through the disc bottom, the broached ats of stem and
disc are aligned.
7. Insert the spacer bar and upper stem into the disc and valve.
8. Replace the top stem bushing and seal and two stem retainers.
9. Then replace the two “C” ring stem retainers and the “Spirolox”® retaining ring back into position
in the top stem hole.
Note: It is recommended that a torque and seat test be done to conrm all is in order with the
maintenance of the valve.
10. Replace the handle, manual gear operator or power actuator on the actuator mounting ange.