Emerson Fisher ENVIRO-SEAL Instruction Manual page 8

ENVIRO-SEAL System - Rotary Valves
February 2019
Figure 4. Typical ENVIRO‐SEAL Rotary Packing Arrangements with Graphite Packing for Fisher Vee‐Ball, Eccentric
Plug, A41, and 8560 Valves
14B0086-A/DOC
STACKING ORDER
GRAPHITE PACKING RINGS
NOTES:
APPLY LUBRICANT
1
THESE TWO SURFACES MUST REMAIN PARALLEL AS YOU ALTERNATELY AND
2
EVENLY TIGHTEN THE PACKING NUTS (KEY 101)
3
VALVE WITH SHAFTS LARGER THAN 38.1 mm (1-1/2 INCH) USE THREE GRAPHITE RINGS
Note the following definitions. You will need them for the next few steps. The target load is the point where the
Belleville springs are designed for optimum performance, when they are compressed to 85% of their maximum
deflection, or nearly flat. Maximum deflection is when the springs are 100% compressed, or completely flat.
12. You will obtain maximum benefit from your ENVIRO‐SEAL packing system when you tighten the packing flange
nuts and compress the Belleville springs to their "target load".
To obtain the target load of 85% compression of maximum deflection, perform the following:
D Tighten the packing flange nuts alternately and evenly, keeping the packing flange parallel with the valve flange
(see figure 7), until the Belleville springs are compressed 100% (or completely flat).
8
2
42B8445-C/DOC
GRAPHITE PACKING
STANDARD DEPTH BOX
3
3
42B8445-C/DOC
GRAPHITE PACKING, OUT-
STANDARD DEPTH BOX
2
BOARD
8510B
Instruction Manual
1
2
42B8445-C/DOC
GRAPHITE PACKING
OPTIONAL DEEP PACKING BOX
V500
D101643X012
3