Instruction Manual

Instruction Manual
D101643X012
ENVIRO-SEAL System - Rotary Valves
November 2011
7
Figure 3. ENVIRO-SEAL PTFE Packing System for Fisher 8532, A11, A31A and A31D Valves
2
32B9116-B
STACKING ORDER OF
PTFE PACKING RINGS
14B0095-A
3
3
NOTES:
NOT USED ON VALVES LARGER THAN NPS 12
1
NOT USED ON A11
NOT USED ON A11 CL600, NPS 3, 4, AND 6
11. Install the packing flange (key 102) on the shaft, and install the packing nuts (key 101). Hand tighten them.
Note
In general, the following tightening procedure applies to all ENVIRO-SEAL packing systems–both sliding-stem and rotary.
CAUTION
Excessive force could cause valve body bushing displacement in Non-Series B Vee-Ball valves, allowing Vee-Ball
misalignment, excessive seat leakage, or stalling of t he actuator.
Note
Lubrication is required for the packing studs and nuts. Although it is important to properly lubricate the stud threads and internal
nut threads, it is also important to p roperly lubricate the contacting face of the nut. See figures 2 through 5 and 7 for lubrication
locations.