Emerson Fisher HP Instruction Manual page 7

Instruction Manual
D104480X012
9. Install packing per Fisher HP and HPA Control Valve Instruction Manual (D101634X012).
10. Apply nickel-based anti-seize lubricant and install two jam nuts (key 47) onto the side of the stem (key 46)
extruding from the packing box. Snug the nuts together, see table 1 for recommended jam nut (key 47) torque
values. These will be removed after flushing/hydro testing.
11. Lower the bonnet (key 18) and stem/nut assembly (key 46, key 47) over the bonnet studs (key 13) and onto the
valve body (key 1), making sure the bonnet (key 18) skirt will not damage the bonnet spiral wound gasket (key 11),
or the three-cage spiral wound gaskets (key 43). When lowering the bonnet (key 18) into the body (key 1), take care
to ensure that the bottom diameter guides properly with the cage (key 2) and the outside diameter of bonnet
guides properly with body (key 1).
Note
The bonnet might not sit flush on the bonnet gasket until the bolts are completely tightened. Once tightened properly, the bonnet
will contact metal-to-metal with the valve body.
For bolt sizes larger than 1-1/2 inch, install washers (key 40) over the bonnet studs, taking care not to introduce
lubricant between the washer and the bonnet surface. Lubricant should be present between the seating surface of
the bonnet stud nut and the washer. Turn the nuts (key 14) onto the studs (key 13) until hand tight.
12. 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.
Table 2. Recommended Bolt Torque for Alloy Steel Bolting Using Anti-Seize Lubricant (Keys 13 and 14)
STUD SIZE
1-3/8
1-1/2
1-5/8
1-3/4
2
2-1/4
2-1/2
1. For other bolting materials or lubricants, contact your
NOMINAL TORQUE
Bolting Materials
B7, B16, B8M2, BD, S20910, N07718, and 660 Studs
N•m
1270
1650
2130
2670
4030
5780
7990
Emerson sales office for torque information.
HP Control Valve Startup Trim
(1)
ft•lbf
935
1220
1570
1970
2970
4260
5890
July 2019
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