Flowserve TX2 Triple Offset High Performance Butterfly Valve IOM - Manual (Page 10)

Flow Control Division
10
11.5 Install the gland follower and tighten it to firmly seat the packing. DO NOT compress the gland follower too
much. Over-tightening may dramatically reduce the life of the packing and may make it more difficult to operate the
valve. The maximum torque of the gland screw as below,
Graphite Packing
Screw Size Max. Torque
M8 110 Kg-cm
M10 120 Kg-cm
M12 140 Kg-cm
M16 450 Kg-cm
M20 650 Kg-cm
11.4 Install each new ring of packing, use the gland
follower to push each ring of packing evenly into
position after starting it in the stuffing box bore.
Stagger the splice-joints of each packing ring so they
are as far as possible from each other (see example
above). Usually, rotating each ring until the splice is
at 90°
from the previous splice is sufficient. (Fig.14)
Fig 14