Flowserve NAF 8886 Series, NAF-Triball Maintenance And Installation Instructions
1
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injury and material damage. Read these instructions
thoroughly!
and comply with applicable safety directives when
working with hazardous or hot/cold medium.
is no risk of crush injuries. The risk is highest with
automatic valves.
unintentional manoeuvre - i.e to atmosphere.
ensuring that the line is free of pressure and any
content.
position to avoid trapping pressure and medium.
suitable for its intended use. This applies especially to
highly oxidising and corrosive medium. Observe also
the risk of erosion and explosion as well as decaying
medium. If in doubt, always request a written
recommendation from NAF AB.
on the valve, i.e pipe forces, always check that the
pipes which the valve is to be welded between are
parallel and have the same centre line.
leakage. Always use great care when disassembling
and reassembling the valves to avoid damage to the
rings from contamination.
The version with long welding ends,
do not need to
be disassembled before welding.
must be in the open position during welding.
The
length of the welding ends is such that the temperature
will not damage the interior of the valve.
XXXX-XX and NAF 8886X4-XXXX-XX
disassembled before welding. The valve body and its
seatrings must be removed as described below and
replaced with a suitable spacer, such as a body of the
same DN but without internal parts. Screw the end
pieces together and weld the unit into the pipe. After
welding, refi t the complete valve body and tighten the
screws to specifi ed torque, see below.
done professionally and in accordance with applicable
standards.
be cleaned from welding debris, scale etc.
Note: When re-assembling the valve, always use new
body seals in order to simplify
and
minimise risk for leakage.
(or stud) and release the other three.
and tighten the bolts (or studs), see required torque as per
table below. Use MoSo2 based grease to lubricate the threads
on the bolts.
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AFE
TY
2.
Assembly/disassembly of NAF-Triball
2.2 NAF-Triball disassembly
2.3 NAF-Triball gland leakage
2.4 Screw torque specifi cation (Nm)
3.
888X5X-XXXX-XX resp. 888X6X-XXXX-XX or versions
thereof.
3.2 Ordering example
4. Material specifi cation
Welding-in of the sampling valve
8886X4-XXXX-XX
5.2
(previously 8887X4-XXXX)
R
V
resp. 888X6X or versions thereof.
3.1
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Stem sealing kit
Seat ring kit
When placing order for spare parts, please specify:
These data are specifi ed on NAF-Triballs identifi cation plate.
Seat ring kit, item No. 9A.
3.2
retighten the gland nut until the leakage stops.
and the packing box exchanged.
To facilitate dismantling and
handling of valves in sizes DN 65-100 these valves are equipped
with a support fl ange for the studs which are fi tted into clea-
rance holes in the top part of the body.
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