
DeZURIK
BHP High Performance Butterfly Valves
D10503
Page 8
November 2015
Replacing Packing
(Continued)
PTFE V-Flex Dual-Seal Live-Loaded Packing Option (TCDL)
The new primary packing (A11) and the new secondary packing (A26) each consist 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 (page 17) for Class 150 valves and in Table B (page 18) for Class 300
valves.
Figure 2 – Packing Option (TCDL)
a. Place the primary (lower) set of packing (A11) in the body, one ring at a time, in the
configuration shown in Figure 2. Do not lubricate. 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 new gasket (A16), the secondary packing chamber (A17) and the lantern ring (A18) in
the configuration shown in Figure 2.
c. Place the secondary (upper) set of packing (A26) in the secondary packing chamber (A17), one
ring at a time—do not lubricate. 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.
d. Place the packing washer (A10) in the secondary packing chamber.
e. Lubricate the threads of the two studs (A14) and the threads and contact faces of the two gland
nuts (A15).
f. Install the retaining ring (A46) into the groove in the shaft (A4).
g. Replace the gland (A12), the new spring washers (A36), the two flat washers (A37) and the two
gland nuts (A15). Arrange the spring washers with the top and bottom washers in series and the
remaining washers in parallel as shown above. Do not tighten the nuts.
h. Mount the actuator bracket and the secondary packing chamber to the body with the same
screws and tighten the screws as shown in Table C (page 19).