Assembly; Replacing The Ball Seal - Fisher Vee-Ball V150 Instruction Manual

Instruction Manual
D101554X012
drive shaft or packing box wall; scratching these surfaces could cause leakage. Clean all accessible metal parts and
surfaces to remove particles that would prevent the packing from sealing.

Assembly

If the valve is equipped with the ENVIRO‐SEAL packing system, refer to the ENVIRO‐SEAL Packing System for Rotary
Valves instruction manual (D101643X012) for assembly.
Series B only
1. For NPS 8, 10, and 12 valves, install the packing spacer (key 34) if it has been removed.
2. To help ensure correct centering of the Vee‐ball (key 2) on the seal (key 11), make sure the ball is closed while you
install or tighten new packing. Insert a screwdriver, pry bar, or similar tool between the lower ear of the ball and the
valve body. Use the pry to move the ball tightly against the bearing on the actuator side of the valve (see figure 6).
Keep the ball in that position until you have completed packing installation and adjustment.
3. Install the new packing parts using the parts sequence shown in figure 5. Install the packing follower (key 17). Alloy
constructions have a packing follower (key 17) and a separate packing flange (key 40) that must be replaced.
4. Secure the packing follower with the packing follower nuts (key 20). Tighten the nuts far enough to stop leakage
under operating conditions.
Handle the seal protector ring, seal, and other parts carefully to prevent damage. A new gasket (key 15) is required
whenever the seal protector ring (key 3) (figure 11) is removed.
Flow ring construction does not use a seal, shims, or spring seal. Use this procedure to remove the seal protector ring
from flow ring constructions, but disregard any instructions calling for the seal, shims, or spring seal.
Note
If the valve is equipped with a bonding strap assembly (figure 3), re‐install the assembly.
5. Reconnect the actuator and lever in accordance with the orientations that were noted in step 3 of the disassembly
procedures. If necessary, use figure 23 to identify the correct index marks.
6. Refer to the appropriate actuator instruction manual to complete actuator assembly and adjustment.
7. When the control valve is in operation, check the packing follower for leakage and retighten the packing follower
nuts (key 20) as necessary.

Replacing the Ball Seal

Disassembly
Perform this procedure if the control valve is not shutting off properly or if seal inspection is necessary. If you find upon
inspection that the ball, shaft, or bearings need to be replaced, use this procedure to remove the ball seal. Then,
proceed to the Bearing and Ball Maintenance procedures. Then, return to this procedure and begin with the assembly
of the ball seal steps.
While the actuator/valve assembly must be removed from the pipeline, the actuator may remain mounted on the
valve as you replace the ball seal.
Key numbers are shown in figures 24, 25, and 26, unless otherwise indicated. Ball Seal assembly details (with key
numbers) are also shown in figures 8, 9 and 10.
Vee-Ball Valves
June 2017
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