DeZURIK
BHP High Performance Butterfly Valves
November 2015
Page 11
D10503
Replacing Packing
(Continued)
PTFE V-Flex Live-Loaded Packing Option (TCL)
The new packing (A11) consists of one bottom end ring, three or more chevron rings and one top end
ring. A quantity of new spring washers (A36) is required as shown in Table A for Class 150 valves and
in Table B for Class 300 valves.
Figure 5 — Packing Option (TCL)
a. Place the packing in the body, one ring at a time, in the configuration shown in Figure 5—do not
lubricate.
Note:
Start each chevron ring into the packing chamber at a slight angle and push each ring
carefully into position so that the sealing lips do not bend over.
b. Place the packing washer (A10) into the packing chamber.
c. Lubricate the following surfaces:
•
The threads of the two studs (A14)
•
The threads and contact faces of the two gland nuts (A15)
d. Install the retaining ring (A46) into the groove in the shaft.
e. Replace the gland (A12), the new spring washers (A36), the two flat washers (A37) and the two
gland nuts (A15).
Note:
Arrange the spring washers in the configuration shown in Figure 8 on page 13, with the
top and bottom washers in series and the remaining washers in parallel.
f. Tighten the nuts finger tight and torque the nuts evenly to the value in Table A (page 17) for
Class 150 valves and in Table B (page 18) for Class 300 valves.
g. Continue with step 10 on page 16.