Megastream; Stealth; Tigertooth - Flowserve Valtek Mark Two User Instructions

8.3.6 Reassembly:
Care should be taken when reassembling to stack up the discs
in the same order and the same rotation. Start by driving the
pins into the crown disk. Then place each disk in descending
order until all disks, except the bottom indexed disc, are in
place. Drive the pins until they are bottomed out. Place the bot-
tom disk on and replace the bolts/studs. Bolts must be torqued,
torque values are available from your local Flowserve contact.
a
CAUTION: To function properly, DiamondBack is always
installed flow under.

8.4 MegaStream

8.4.1 MegaStream replaces the standard Mark One retainer with a
drilled hole retainer, see Figure 9. The plug and bonnet are
typically identical to the standard Mark One design. Assembly
and disassembly of the valve follows the standard procedures.
8.4.2 MegaStream retainers, plugs and seats should be examined for
damage when disassembled. Holes in the retainer should be
checked for worn or eroded surfaces. Check for plugged holes
in the retainer. Multi-stage MegaStream retainers cannot be
disassembled. Repair and replacement of damaged parts is
critical to maintaining noise control.
a
CAUTION: To function properly, MegaStream is always installed
flow under.

8.5 Stealth

8.5.1 Stealth replaces the standard Mark One retainer with a braised,
stacked-disk retainer, see Figure 10. Several of the parts,
including the plug, seat ring and bonnet have dimensional
differences from the standard Mark One design. Assembly and
disassembly of the valve follows the standard procedures.
8.5.2 Stealth retainers, plugs and seats should be examined for
damage when disassembled. Holes in the retainer should be
checked for worn or eroded surfaces. Check for plugged holes in
the retainer. Stealth retainers cannot be disassembled. Repair
and replacement of damaged parts is critical to maintaining noise
control.
a
CAUTION: With rare exception, to function properly, Stealth is
always installed flow under.
8.5.3 When reinstalling Stealth retainers, care must be given to
orientating the retainer correctly. Stealth retainers have an
arrow that must be aligned with the valve outlet.
14
Valtek Mark One and Mark Two Control Valves FCD VLENIM0001-02-A4 - 05/16

8.6 TigerTooth

8.6.1
8.6.2
TigerTooth replaces the standard Mark One retainer
with a welded or pinned, stacked-disk retainer, see
Figure 11. Several of the parts, including the plug, seat
ring and bonnet have dimensional differences from the
standard Mark One design. Assembly and disassem-
bly of the valve follows the standard procedures.
TigerTooth retainers, plugs and seats should be
examined for damage when disassembled. The retainer
should be checked for worn or eroded surfaces. Check
for debris lodged in the retainer. Pinned TigerTooth re-
tainers can be disassembled and cleaned. Care should
be taken when reassembling to stack up the discs in
the same order. Each disc has been etched with a
number for that purpose. Welded TigerTooth retainers
should not be disassembled outside a qualified service
centre. Repair and replacement of damaged parts is
critical to maintaining noise and/or cavitation control.
a
CAUTION: With rare exception, to function properly,
TigerTooth is always installed flow under.