Emerson Fisher DSV1000, Instruction Manual

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Instruction Manual
D104727X012
DSV1000 Valve
June 2022
10
WARNING
When lifting the ball, ensure the bearing plates (key 11) are secure on the ball trunnions to prevent parts from falling which
may cause personal injury or property damage.
Note
Refer to figure 6 and note the NPS6 CL150 construction is different than the balance of the DSV1000 product line in that it lacks
bearing plates and the ball design does not have male trunnions. Specific to the NPS6 CL150, ball removal also requires removal of
the follower trunnion (key 42) and fasteners (key 43).
11. Turn the ball (key 3) to the closed position. Use an approved lifting sling through the ball bore to lift the ball out of
the valve body. Lift the ball and set it on a clean soft surface.
12. Remove the two bearing plates (key 11) and thrust washers (key 17) from the ball. Inspect the lined bushing
(key 12) in each bearing plate and the thrust washers. If necessary, replace worn components.
13. Evenly loosen the heavy hex nuts (key 21) from the studs, if applicable, remove base brackets (key 25), and lift the
body (key 1) from the lower tailpiece (key 2).
14. Lift the seal out of the lower tailpiece. Note the seal O-ring and back up ring (keys 15 and 16) and the multitude of
springs (key 18). Ensure all springs and the lower bearing plate dowel pins (key 22) are accounted for. Clean and
protect all sealing surfaces.
Valve Assembly
Be sure to replace valve parts in the same position and orientation from which they were removed. Use the following
steps to reassemble the valve.
Note
Clean and protect all sealing surfaces from damage while installing parts. Lubricate components when necessary as an aid for
installation and to help protect sealing surfaces.
Refer to figures 4, 5, and 6 to identify the DSV1000 valve components by key number.
During assembly, visually inspect component surfaces that interface with an O-ring or seal for any damage that may
prevent proper sealing.
1. Place both tailpieces (key 2), flange end down on a clean soft surface with the seal assembly cavity facing up. Use
caution to protect the flange end serrated surfaces.
2. Lubricate the tailpiece counterbores where the seal will insert and inject lubricant into each of the spring holes.
Install the seal springs (key 18).
3. On both seals (key 5), install the O-ring (key 15) and backup ring (key 16) in the correct orientation (see figure 5
and 6.
4. Lubricate the seal O-rings and insert the seal assembly into the tailpiece counterbores. Maintain axial alignment of
the two components as the seal assembly is pushed into place.