Instruction Manual

Instruction Manual
D100390X012
ED Valve
October 2014
13
necessarytoalignthepinholeinthestemwithoneoftheholesintheadaptor.Securetheadaptortothestemwith
anewpin.
Assembly
Except where indicated, key numbers are referenced in figure 19 for standard NPS 1 through 6 constructions, figure 20
for Whisper Trim III detail, figure 21 for the NPS 8 ED valve, and figures 22 and 23 for WhisperFlo trim.
Table 5. Valve Stem Connection Torque and Pin Replacement
VALVE STEM CONNECTION (VSC)
TORQUE,
MINIMUM TO MAXIMUM
DRILL SIZE, INCH
mm Inch NSm LbfSft
9.5
12.7
19.1
25.4
31.8
3/8
1/2
3/4
1
1-1/4
40 to 47
81 to 115
237 to 339
420 to 481
827 to 908
25 to 35
60 to 85
175 to 250
310 to 355
610 to 670
3/32
1/8
3/16
1/4
1/4
1. With a restricted-trim seat ring construction, install the adaptor gasket (key 14) and seat ring adaptor (key 5).
2. Install the seat ring gasket (key 13), seat ring or liner (key 9).
3. Install the cage or cage/baffle assembly (key 3). Any rotational orientation of the cage or assembly with respect to
the valve is acceptable. A Whisper Trim III cage designated by level A3, B3, or C3 may be installed with either end
up. The level D3 cage/baffle assembly, however, must be installed with the hole pattern end next to t he seat ring. If
a cage retainer (key 31) is to be used, place it on top of the cage.
4. Slide the valve plug (key 2) and stem assembly, or valve plug and ENVIRO-SEAL bellows seal assembly, into the cage
untilthepistonring(s)islevelwiththetopofthecage(key3)orcageretainer(key31).
5. Installing piston rings (key 6):
a. For valve plugs with a single piston ring: Make sure the piston ring is evenly engaged into the entrance chamfer
atthetopofthecageorcageretainerring.Carefullypressthepistonringintothecageorcageretainerring.
b. For valve plugs with multiple piston rings: As each piston ring is slid into the cage, make sure the ring is evenly
engaged in the entrance chamfer at the top of the cage or cage retainer. Also, make sure to offset the fracture in
the rings to minimize leakage. Carefully press each piston ring into the cage or cage retainer ring.
6. Place the gaskets (keys 12, 11 or 14 if used, and 10) and t he shim (key 27 or 51) if used, on top of the cage or cage
retainer. If there is a cage adaptor (key 4) or a bonnet spacer (key 32), set it on the cage or cage retainer gaskets and
place another flat sheet gasket (key 10) on top of the adaptor or spacer. If there is only a cage retainer, place
another flat sheet gasket on the retainer.
7. With an NPS 8 ED valve, install the load ring (key 26).
8. Mount the bonnet on the valve and complete assembly according to steps 10 through 14 of the Replacing Packing
procedure. Be sure to observe the note prior to step 10.
Retrofit: Installing C-seal Trim
Note
Additional actuator thrust is required for a valve with C-seal trim. When installing C-seal trim in an existing v alve, contact your
Emerson Process Management sales office for assistance in determining new actuator thrust requirements.
Assemble the new valve plug/retainer assembly (with C-seal plug seal) using the following instructions: