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Repacking Instructions for N
and HN Series Valves
Disassembly:
1. Loosen the lock nut and packing bolt.
2. Remove the bonnet assembly from the
valve body. Do not remove the union
nut from the bonnet.
3. Turn the stem into the bonnet until the
handle slightly touches the packing
bolt.
4. Loosen set screw and remove handle.
5. Remove packing bolt and lock nut.
6. Remove the stem from the bonnet. Turn
the bonnet upside down to remove the
packing(s), packing supports (in PTFE
and PEEK packed valves), and the
gland.
NOTE:
Be very careful when removing
packing so as not to damage the
inside of the bonnet.
7. Discard the packing(s) and packing
supports (in PTFE and PEEK packed
valves).
DO NOT
discard the gland.
8. Clean all reusable parts thoroughly in
solvent and dry all parts.
Reassembly:
9a. PTFE Packing:
Lubricate the stem
threads with MS - LT- NNS -1 and
re-insert the stem through the bottom
of the bonnet. Lubricate the valve body
threads and the body to bonnet sealing
area with MS-LT-NNS-1 and place
the bonnet assembly onto the body.
Tighten the union nut onto the body
finger-tight. Place one of the packing
supports into the bonnet. Place the
packing into the bonnet by carefully
pushing down with a blunt instrument.
Be careful not to damage any stem
or bonnet threads. Put the second
packing support into the bonnet on top
of the packing. Place the gland into the
bonnet. Proceed to step 10.
9b. UHMWPE Packing:
Lubricate the
stem threads with MS-LT-NNS-1 and
re-insert the stem through the bottom
of the bonnet. Lubricate the valve body
threads and the body to bonnet sealing
area with MS-LT-NNS-1 and place
the bonnet assembly onto the body.
Tighten the union nut onto the body
finger-tight. Place the packing into the
bonnet with a blunt instrument. Be
careful not to damage any threads).
Place the gland into the bonnet.
Proceed to step 10.
9c.
Grafoil Packing:
Lubricate the stem
threads, stem shank, and each
individual piece of grafoil packing with
MS-LT-NNS-1. Re-insert the stem
through the bottom of the bonnet.
Lubricate the valve body threads and
the body to bonnet sealing area with
MS-LT-NNS-1 and place the bonnet
assembly onto the valve body. Tighten
the union nut onto the body finger-tight.
Push each packing into the bonnet one
at a time, using the gland.
Use all of
Kit Contents:
1
Number of packings will vary according to valve series.
PTFE Packing
UHMWPE Packing
Packing (1)
Packing (1)
Packing support (2)
Lubricant (1)
Lubricant (1)
Instruction sheet (1)
Instruction sheet (1)
MSDS (1)
MSDS (1)
Grafoil
Packing
PEEK Packing
Packing
1
Packing (2)
Lubricant (1)
Packing support (2)
Instruction sheet (1)
Lubricant (2)
MSDS (1)
Instruction sheet (1)
MSDS (2)
WARNING
BEFORE SERVICING ANY INSTALLED
VALVE, YOU MUST:
∙ depressurize system
∙ cycle the valve
∙ purge the valve.
A Swagelok Pre-Engineered Subsystem Fast Loop Module
39
Содержание Fast Loop Module
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