Seal Designs; Actuator Stem / Stem Clamp Alignment - Flowserve Valtek Mark 100 User Instructions

Valtek ® Control Products Mark 100
PTFE Seals
O-ring Seals PTFE Seals
Carbon Triple Seal
Carbon Single Seal Carbon Triple Seal
Figure 3: Seal designs
Figure 4: PTFE seal cutting detail
VAIOM000103-02 (EN/AQ) March 2020
and Mark 100SC Control Valves
™
Metal Multi-Seal
Metal Multi-Seal
4. Lower the plug into the body and sleeve. Care should be
taken with the plug seals to avoid scoring or galling the
sealing surface while fitting them into the sleeve bore.
With metal multi-seals and carbon triple seals, use a ring
compressor on the rings. A suitably sized screw-type hose
clamp will also serve to compress the rings for reassembly.
5. Lower the bonnet onto the plug and body, taking great care
to avoid scoring the plug stem.
6. Once the bonnet is resting squarely in the valve body,
finger-tighten the bonnet flange bolting.
7. Reinstall the packing and guides, referring to the appro-
priate packing installation manual and reinstalling new
packing exactly as shown. For unusual packing config-
urations, please contact Flowserve for packing stack-up
configurations. Make sure at least
packing box for the top guide to enter. Different spacer
lengths permit a wide variety of packing configurations,
such as twin seal and vacuum-pressure packing.
c
Soft Seat Retainer WARNING: Valves with extended bonnets must not
have lower packing installed. Instead, lower packing
Soft Seat
rings should be installed with the upper set. Lower
packing installed in extended bonnets will diminish the
Seat Ring
integrity of the packing assembly.
NOTE: Graphite guide liners should be replaced each time
the valve packing is replaced. Do not rebuild the valve
without new graphite liners in the guides.
8. Replace and tighten the packing gland and bolting. Refer
Figure 4: Soft Seat Assembly
to the packing installation manual for specific details on
maintaining the style of packing supplied.
9. Turn actuator back onto the body assembly, without turning
the plug inside the bonnet. Leave a 2 to 3 mm (
gap between the mating surfaces of the bonnet and yoke.
Tighten yoke bolting to close this gap. Firmly tighten the
yoke bolting.
Figure 5: Actuator stem / stem clamp alignment
Figure 5: Actuator Stem / Stem Clamp Alignment
Valtek Mark One and Mark T
⁄ in is left at the top of
1
8
⁄ to ⁄ in)
3 1
32 8
Flowserve.com 12
7 Asse
NO
act
ww
pro
NO
wh
goo
ins
Rep
the
7.1 To
thr
7.2 If th
pac
rein
sur
for
spa
as
a
CA
se
be
in
di
NO
pa
co
7.3 Re
no
ba
7.4 Tu
in
fla
ac
fa
th
an
su
Fir