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APPENDIX A
FIG. 15.
Double Case Meters are equipped with a liquid sealed
type packing gland as shown in Figure 15.
Glycerine is used as a sealing and lubricating medium
and should be injected into the gland at regular
intervals. Meters in-different services will require more
or less servicing of the packing gland, and the interval
can best be determined from experience. However, it is
recommended that the injection interval not exceed 60
days.
Packing rings may be replaced when necessary by using
the same care that would be used in packing any liquid
sealing device. The shaft should be replaced if worn, or
otherwise cleaned with crocus cloth, using a rotary
motion.
Care should be exercised in replacing the cover of the
outer housing of the Double Case Meter to insure that
the packing gland shaft is properly centered. The cover
is located to the housing with a dowel and by centering
the studs visually in all of the holes in the cover, proper
centering can be accomplished.
Reassemble in reverse order from disassembly, making
sure to apply sealing compound to outlet flange of inner
unit.
A9-27
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