Instruction Manual
D103553X012
Large ET and ED Valves
July 2017
19
Assembly
After completing Packing Maintenance and/or Trim Maintenance procedures, the following steps will guide you
through reassembly of the valve.
For ED/EWD and ET-C/EWT-C Valves only
1. Remove the cover protecting the valve body cavity.
2. Install a new seat ring gasket (key 13) into the valve body. Make sure the eye bolts that were installed in the seat
ring (key 9) during the Disassembly procedure are still installed. Then using the eye bolts as lifting points, carefully
lower the seat ring into the valve body. Make sure that the cap screw holes in the seat ring are lined up with their
mating holes in the valve body. Remove the two eye bolts from the seat ring.
CAUTION
Uneven tightening of the cap screws (key 49) will result in the seat ring seating surface being askew from the valve plug
seating surface, thereby preventing the valve from attaining its rated shutoff class. This is especially critical in ED/EWD
valves equipped with the bore seal. If after assembly the rated shutoff class is not attained your
Emerson sales office
or
Local Business Partner can provide further assistance.
3. Secure the seat ring to the valve body using the cap screws (key 49). Tighten the cap screws in a criss-cross pattern
working up to the final torque in four equal increments as specified in table 6.
4. Install a new cage gasket (key 11) into the valve body.
5. Make sure the eye bolts that were installed in the cage (key 3) or cage assembly during the Disassembly procedure
are still installed. Then using the eye bolts as lifting points, carefully lower the cage into the valve body. Any
rotational orientation of the cage with respect to the valve is acceptable.
6. Complete reassembly according to steps 10 through 15 of the Replace Packing section.
Table 6. Seat Ring Cap Screw Torque
VALVE SIZE, NPS
FIRST INCREMENT
SECOND INCREMENT
THIRD INCREMENT
FOURTH INCREMENT
FINAL TORQUE
N•m
Lbf•ft
N•m
Lbf•ft
N•m
Lbf•ft
N•m
Lbf•ft
12, 14, and 16x12
9.75
7
19.5
14
29.25
21
39
28
16, 18, 20x16, 24x16, 20, 24x20, and 30
23
17
46
34
69
51
92
68
For ET/EWT Valves only
1. Remove the cover protecting the valve body cavity.
2. Install a new cage gasket (key 11) into the valve body.
3. Make sure the eye bolts that were installed in the cage (key 3) or cage assembly during the Disassembly procedure
are still installed. Then using the eye bolts as lifting points, carefully lower the cage into the valve body. Any
rotational orientation of the cage with respect to the valve is acceptable. Use care to avoid damaging the seat ring
seal ring (key 223) while handling the heavy parts. To help insert the cage assembly into the valve, lubricate the
outside diameter of the seat ring seal ring with general purpose silicone-base lubricant.
4. Complete reassembly according to steps 10 through 15 of the Replace Packing section.
