Flowserve DMX - Manual (Page 46)

DMX/DMXD/DMXH/DMXDH USER INSTRUCTIONS ENGLISH 85392728 - 10/09
Page 46 of 60
this is not done, the high-pressure liquid will
bypass and erode the ring fits.
It is important that the gasket at the seal
chamber be flush with the casing faces. It is
necessary hang a little bit of gasket out and cut after
final torque.
Do not use any hammering device to cut
gasket.
When cutting parting flange gasket, do
not forget to cut opening for discharge passage.
Position of the Parting Flange Gasket
6.8.15 Parting flange torque procedure
Assemble upper half casing to lower half casing and
secure with washers and cap-nuts listed on the parts
list of the casing. Torque the cap-nuts in three or
more complete passes of increasing torque values
until the torque values in 6.5.1 are achieved.
Minimum recommended torque passes:
First pass -
50% specified torque value
Second pass- 90% specified torque value
Final pass -
100% specified torque value
Tighten the cap-nuts in the following sequence during
each pass:
a) Torque both center cap-nuts – marked O.
b) Torque the cap-nuts shown in below diagram,
casing quadrant 3. Start approximately in the
center of the pump and proceed towards the
suction nozzle.
c) Torque the cap-nuts on the opposite corner of the
pump as indicated in below diagram, casing
quadrant 4. Again, start at the center of the pump
and work towards the opposite end.
d) Torque the cap-nuts in below diagram, casing
quadrant 5 in a similar manner.
e) Torque the cap-nuts in below diagram, casing
quadrant 6 in a similar manner.
f) Repeat the same sequence two or more times
using increasing torque values with each full
pass.
Parting flange torque procedure diagram
DISCHARGE
PASSAGE