Mark One With Megastream Trim Body Assembly; Mark One With Stealth Trim - Flowserve Valtek Mark 100 User Instructions

Valtek ® Control Products Mark 100
7.4 MegaStream
™
1. MegaStream replaces the standard Mark One retainer
with a drilled hole retainer; see Figure 10. The plug and
bonnet are typically identical to the standard Mark One
design. Assembly and disassembly of the valve follow
the standard procedures.
2. MegaStream retainers, plugs and seats should be exam-
ined 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 replace-
ment of damaged parts are critical to maintaining noise
control.
a CAUTION: To function properly, multi-stage MegaStream
is always installed flow under.
VAIOM000103-02 (EN/AQ) March 2020
and Mark 100SC Control Valves
™
Valtek Mark One and Mark Two Control Valves FC
Figure 9: Mark One with MegaStream Trim Body Assembly
Figure 10: Mark One
with MegaStream trim
body assembly
7.5 Stealth
™
1. Stealth replaces the standard Mark One retainer with a
braised, stacked-disc retainer; see Figure 11. Several of
the parts, includ ing the plug, seat ring and bonnet, have
dimensional differences from the standard Mark One
design. Assembly and disassembly of the valve follow
the standard procedures.
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 replace ment of damaged parts
are critical to maintaining noise control.
a CAUTION: With rare exception, to function properly, Stealth
is always installed flow under.
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.
Figure 10: Mark One with Stealth Trim Body Assembly
Valtek Mark On
8.2.4.3 Reassemble the retaine
ing sure to leave an ope
pin can be driven out in
bead of weld to each pi
NOTE: Do not weld mor
Excessive heat from the
disturb critical retainer
rod which is compatible
Figure 11: Mark
One with Stealth trim
uncertain, contact the f
body assembly
a
CAUTION: To function p
installed flow over.
8.3 DiamondBack
8.3.1 DiamondBack replaces
a stacked-disk retainer
pinned, see Figure 8. S
seat ring and bonnet m
the standard Mark One
Flowserve.com 16
of the valve follows the