Severe Service Trim Options; Mark One With Cavcontrol Trim Body Assembly; Body Assembly - Flowserve Valtek Mark 100 User Instructions

Valtek ® Control Products Mark 100
7
Severe service
trim options
7.1 CavControl
™
1. CavControl replaces the standard Mark One retainer with a
drilled, stepped-hole retainer; see Figure 7. The plug and
bonnet have dimensional differences from the standard
Mark One design. Assembly and disassembly of the valve
follow the standard procedures.
2. CavControl retainers, plugs and seats should be examined
for excessive cavitation damage when disassembled.
Holes in the retainer should be checked for worn or eroded
surfaces. Check for plugged holes in the retainer. Plugs and
retainer mating surfaces should be examined for damage.
Repair and replacement of damaged parts are critical to
maintaining cavitation resistance.
a CAUTION: To function properly, CavControl is always
installed flow over.
VAIOM000103-02 (EN/AQ) March 2020
and Mark 100SC Control Valves
™
Valtek Mark One and Mark Two Control Valves FCD
Figure 7: Mark One
with CavControl trim

body assembly

7.2 ChannelStream
1. ChannelStream replace the standard retainer with multiple
sleeves pinned together; see Figure 8. 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. ChannelStream retainers, plugs and seats should
be examined 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. Plugs and
retainer mating surfaces should be examined for damage.
Repair and replacement of damaged parts are critical to
maintaining cavitation resistance.
3. ChannelStream retainers should be cleaned of debris
whenever the valve is opened.
8 Severe Service Trim
4. Use the following steps if the retainer must be disassem-
bled to clean or inspect for damage. ChannelStream
retainers in pressure classes 900 and higher cannot be
8.1 CavControl
disassembled in the field. Contact your local Flowserve
representative for service options.
8.1.1
5. Carefully grind away the small bead welds located on the
assembly pins near the top of the retainer. This will loosen
the pins which hold the retainer together. Using a punch,
locate the hole in the retainer opposite the pin and drive
each pin out of the retainer.
6. The retainer can now be inspected for damage or cleaned.
7. Reassemble the retainer sleeves and reinstall the pins,
8.1.2
mak ing sure to leave an open hole opposite each pin so
that the pin can be driven out in the future. Apply a small
( ⁄ in) bead of weld to each pin to hold it in place.
1
8
™
CavControl replaces the standa
a drilled, stepped-hole retainer,
bonnet have dimensional differ
One design. Assembly and dis
the standard procedures.
CavControl retainers, plugs and
excessive cavitation damage w
the retainer should be checked
Check for plugged holes in the
mating surfaces should be exa
and replacement of damaged p
Flowserve.com 14
cavitation resistance.