Emerson Fisher HP, Instruction Manual

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Instruction Manual
D104480X012
HP Control Valve Startup Trim
July 2019
9
8. Torque bonnet nuts (key 14) in a crisscross pattern with no more than 1/4 of the nominal torque specified in table 2.
When all nuts are tightened to that torque, increase the torque by 1/4 of the specified nominal torque and repeat
the crisscross pattern. Repeat the above until all nuts are tightened to the specified nominal torque value. If any nut
still turns at the final torque, tighten every nut to the final torque again. For odd number of bolts, tighten the
bonnet nuts following the pattern shown in figure 6.
Disassembly of Startup Trim Kits
Disassembly of Flushing and Hydro Trim Kits
1. Loosen the bonnet nuts (key 14), using an even and opposing pattern, as specified in figure 6. This will prevent
uneven loading of the bonnet flange studs which may cause binding.
Individual nuts should not be completely loosened while the remaining nuts are tight. It is suggested that at least
two stages of loosening be used to avoid overloading the last few remaining studs.
2. Remove the bonnet from the valve by pulling straight up. If the bonnet seems to bind in the valve body, check the
alignment of the hoist or rigging equipment. Ensure that the bonnet is lifted straight off the body to prevent parts
damage.
3. Remove two jam nuts (key 47) from the side of the stem (key 46) extruding from the packing box.
4. Remove packing per Fisher HP and HPA Control Valve Instruction Manual ( D101634X012 ).
5. Remove the stem/nut assembly (key 46, key 47).
6. Remove and discard the bonnet spiral wound gasket (key 11).
7. Remove and discard the three-cage spiral wound gaskets (key 43).
8. For Flushing Trim : Install eyebolt (3/8-16 UNC-2B) in to the hole on the top of the cage (key 2), as shown in figure 2.
Then proceed with step 8.
For Hydro Trim : Install threaded rods (1/4-20 UNC-2B) in to the holes on the top of the cage (key 2). Install hoist
rings, nuts or eye bolts on to the threaded rod, as shown in figure 3. Then proceed with step 8.
9. Remove the cage (key 2) from the valve body cavity.
10. Remove and discard the seat ring flat sheet gasket (key 12).
Disassembly of Chemical Cleaning Trim Kits
1. Loosen the bonnet nuts (key 14), using an even and opposing pattern, as specified in figure 6. This will prevent
uneven loading of the bonnet flange studs which may cause binding.
Individual nuts should not be completely loosened while the remaining nuts are tight. It is suggested that at least
two stages of loosening be used to avoid overloading the last few remaining studs.
2. Remove the bonnet from the valve by pulling straight up. If the bonnet seems to bind in the valve body, check the
alignment of the hoist or rigging equipment. Ensure that the bonnet is lifted straight off the body to prevent parts
damage.
3. Remove two jam nuts (key 47) from the side of the stem (key 46) extruding from the packing box.
4. Remove packing per Fisher HP and HPA Control Valve Instruction Manual ( D101634X012 ).
5. Remove the stem/nut assembly (key 46, key 47).
6. Remove and discard the bonnet spiral wound gasket (key 11).
Cleaning
After removal of the chemical trim, the interior of the valve body and all internal parts should be properly cleaned prior
to reassembly.