Mark One With Channelstream Trim Body Assembly; Diamondback Trim Body Assembly - Flowserve Valtek Mark 100 User Instructions

Valtek ® Control Products Mark 100
NOTE: Do not weld more than the approved
Excessive heat from the bead welds that are too large
can disturb critical retainer tolerances. Use an appropriate
weld rod which is compatible with the retainer material.
If uncertain, contact the factory.
a CAUTION: To function properly, ChannelStream is always
installed flow over.
7.3 DiamondBack
1. DiamondBack replaces the standard Mark One retainer
with a stacked-disk retainer that is either welded or bolted
and pinned; see Figure 9. Several of the parts, including
the plug, seat ring and bonnet, may have dimensional
differences from the standard Mark One design. Assembly
and disassembly of the valve follow the standard
procedures.
2. DiamondBack retainers, plugs and seats should be exam-
ined for excessive cavitation damage when disassembled.
The inner holes in the retainer should be checked for wear
or erosion; evidence of erosion should require that the
retainer is disassembled or replaced. Plugs and retainer
mating surfaces should be examined for damage. Repair
and replacement of damaged parts are critical to main-
taining cavitation resistance.
VAIOM000103-02 (EN/AQ) March 2020
and Mark 100SC Control Valves
™
⁄ in.
1
8
Figure 8: Mark One
with ChannelStream
trim body assembly
™
3. DiamondBack retainers should be cleaned of debris
whenever the valve is opened.
4. It is rare that DiamondBack stacks require disassembly to
clean. The passages of the DiamondBack can be cleaned
by pushing a wire through the passages from the inside of
the stack, by air or by water rinsing. When required, pinned
and bolted DiamondBack retainers can be disassembled
and cleaned in the field. Welded DiamondBack retainers
should not be disassembled outside a qualified service
Figure 6: Mark One with CavControl Trim Body Assembly
center.
5. Disassembly of bolted DiamondBack retainers:
Remove the nuts from the bolts/studs. Place the retainer
with the crown disc facing down and remove the bolts/
studs from the stack. Remove the bottom indexed disc.
Press the pins out away from the crown disc. Take the
discs apart, maintain ing the order of assembly. Replace
damaged discs, alignment pins bolts or nuts. Inspect and
clean out disc passages.
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 disc. Then place each
disc in descending order until all discs, except the bottom
indexed disc, are in place. Drive the pins until they are
bottomed out. Place the bottom disc 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
Figure 7: Mark One with ChannelStream Trim Body Assembly
installed flow under.
Figure 8: Diamondback Trim Body Assembly
bonnet have dimensional differe
One design. Assembly and disa
the standard procedures.
8.1.2 CavControl retainers, plugs and
excessive cavitation damage wh
the retainer should be checked f
Check for plugged holes in the r
mating surfaces should be exam
and replacement of damaged pa
cavitation resistance.
a
CAUTION: To function properly,
flow over.
8.2 ChannelStream
8.2.1 ChannelStream replace the stand
sleeves pinned together, see Fig
and bonnet have dimensional di
Mark One design. Assembly an
follows the standard procedures
8.2.2 ChannelStream retainers, plugs a
for excessive cavitation damage
inner holes in the retainer should
erosion, evidence of erosion sho
disassembled. Plugs and retaine
examined for damage. Repair an
parts is critical to maintaining cav
8.2.3 ChannelStream retainers should
the valve is opened.
8.2.4 Use the following steps if the ret
to clean or inspect for damage.
Figure 9: DiamondBack
pressure classes 900 and highe
trim body assembly
in the field. Contact your local Fl
service options.
8.2.4.1 Carefully grind away the small b
assembly pins near the top of th
the pins which hold the retainer
locate the hole in the retainer op
pin out of the retainer.
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