Instruction Manual

Instruction Manual
D103298X012
Control-Disk Valve
May 2011
9
CAUTION
Tighten the packing flange only enough to prevent shaft leakage. Excessive tightening will only accelerate wear of the
packing and could produce higher torques on the valve.
Figure 5. Packing Arrangement Details
STANDARD PACKING
ENVIRO‐SEAL PACKING
SINGLE PTFE PACKING
GRAPHITE PACKING
PTFE V‐RING
GRAPHITE RIBBON
THESE TWO SURFACES SHOULD REMAIN PARALLEL AS YOU ALTERNATELY AND EVENLY TIGHTEN THE PACKING NUTS (KEY 28).
NOTES:
WITH CONDUCTIVE PACKING, THE FEMALE ADAPTOR IN PTFE V‐RING PACKING IS CARBON‐FILLED PTFE.
APPLY LUBRICANT.
1
2
3
GE39901‐A
GE39986‐A
GE40113‐A
GE40118‐A
Leakage around the packing followers can be stopped by tightening the packing flange nuts (key 28, figure 11).
If the packing is relatively new and tight on the shaft, and if tightening the packing flange nuts does not stop leakage,
the shaft may be worn or nicked so that a seal cannot be made. If the leakage comes from the outside diameter of the
packing, the leakage may be caused by nicks or scratches around the packing box wall. Inspect the shaft and packing
box wall for nicks and scratches when performing the packing replacement procedures.