Flowserve Valtek Mark One and Mark Two Control Valves - Manual (Page 14)

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Valtek Mark One and Mark Two Control Valves FCD VLENIM001-01-AQ - 8/14
sional differences from the standard Mark One design. As-
sembly and disassembly of the valve follows the standard
procedures.
8.4.2. 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 disassem-
bled. Repair and replacement of damaged parts is critical to
maintaining noise control.
CAUTION: With rare exception, to function properly, Stealth
is always installed flow under.
8.4.3 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.
8.5. TigerTooth
8.5.1. TigerTooth replaces the standard Mark One retainer with a
welded or pinned, stacked-disk retainer, see Figure 10. Sev-
eral 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. 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 retainers can be
disassembled and cleaned. Care should be taken when re-
assembling to stack up the discs in the same order. Each
disc has been etched with a number for that purpose. Weld-
ed TigerTooth retainers should not be disassembled outside
a qualified service centre. Repair and replacement of dam-
aged parts is critical to maintaining noise and/or cavitation
control.
CAUTION: With rare exception, to function properly, Tiger-
Tooth is always installed flow under.
Figure 10
Mark One with TigerTooth Trim Body Assembly