Appendix - b – Bray 19 Series User Manual

Page 8

Installation and Maintenance Manual

Series 19 - Segmented Ball Valves

Date: Feb 2013 / Page 14 of 19

Installation and Maintenance Manual

Series 19 - Segmented Ball Valves

Date: Feb 2013 / Page 15 of 19

A Subsidiary of BRAY INTERNATIONAL, Inc.

FLOW-TEK, Inc.

Tel: 832.912.2300

8323 N. Eldridge Pkwy #100

Fax: 832.912.2301

Houston, Texas 77041

www.flow-tek.com

FLOW-TEK, Inc.

Tel: 832.912.2300

8323 N. Eldridge Pkwy #100

Fax: 832.912.2301

Houston, Texas 77041

www.flow-tek.com

11. DISASSEMBLY AND REASSEMBLY

11.1 Removing Actuator from Body

1. Refer to relevant actuator installation, operation, and

maintenance instructions, and proceed.

2. Support the actuator assembly before disconnecting it

from the body assembly.

3. Remove mounting bracket bolts from body and lift

actuator assembly off stem.

11.2 Dismantling the Valve

Refer to parts listing on pg. 18 & 19.

1. Turn the valve into the closed position and remove from

pipeline.

2. Place the valve on a flat surface with seat retainer (2A)

facing up.

3. Loosen the screwed-in seat retainer (2A) by turning it

counterclockwise and removing it from the body (1)
along with the retainer O-rings (4A, 4B). (A special
cross-wrench tool may be ordered from the factory).

4. Once the seat retainer is removed, remove the seat (2),

wave springs (3) and shims (3A) along with the seat
O-ring (4).

5. Remove the gland retainer (15) by removing both

packing nuts (18) (Removing the packing studs (16) is
not necessary).

6. Remove the post cover (20) by dismantling the post cover

nuts (23) and pushing with Screwdriver.

7. Drive both the stem and end post pins(10, 11) into the

center of the stem and post until the outward end of the
pin clears the segment (5). Be careful not to damage the
stem or post. The pins can then be punched out of the
stem and post when they are removed from the valve.
Carefully remove post cove (20) and the gasket (19) and
finally the post (9). (Inserting a bolt in the jack screw
hole, tapped in the post, will help in removing the post).

8. Remove the stem (8) by pushing it out through the post

end of the body.

CAUTION:

Take special care to not damage the splined

end of valve stem during disassembly.

Figure 11

Removing the retainer with special tool

Both pins are driven inside before dismantling

9. Rotate the segment (5) inside the body so the non-splined end of the

segment is toward the downstream port of the valve and remove the
segment straight out of the body.

CAUTION:

Be extremely careful not to gall or scratch the sealing

surface of the segment when removing it from body. Scratches may
later cause excessive leakage and seal wear.

APPENDIX - B

CLASS 600

Figure 12