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of individual packings, thereby preventing leakage
and excessive wear. The packings include a leaf type
spring that must be on the side of the packing towards
the higher pressure. For elevated inlet pressure
applications, the spring must be above the packing.
For vacuum type applications, the spring must be
below the packing.
More packings generally means tighter gas control. A
vent/purge port between the packings can be used to
add additional gas leakage control.
Three main styles of rod-packing arrangements
are used on Hycomp oil-free air boosters and gas
compressors: the ‘B’ series, used for air and non-
contaminant gas boosting; the ‘G’ series, used to
boost most other industrial gases; and the ‘H’ series,
Gas Packing Case
Vent/Purge Connection Port
(must be plumbed at installation
for ‘G’ & ‘H’ series boosters)
used with gases that require the highest degree of
containment.
To operate effectively, the packing cases must be
properly plumbed (see Figure 15). If your booster
compressor is of the ‘B’ con
fi
guration, you do not
need to add any additional plumbing. If your booster
compressor is of the ‘G’ or ‘H’ con
fi
guration, you must
add additional piping to vent or purge any gas leakage.
This piping will not be installed from the factory.
The gas vent/purge ports are 1/8” NPT. Hycomp
suggests the use of minimum 1/4” tubing to vent or
purge the ports. Use proper tubing practices for vent/
purge line installations.
Venting
- If it is safe to vent the gas to atmosphere, run
Figure 15: Gas Packing Plumbing Requirements for ‘G’ and ‘H’ Series Gas Compressors
Crossover pipe
included from factory