Xylem 9100 Series Base Mounted Centrifugal Fire Pumps AC8585 REV.C - Manual (Page 19)

pressure. If slurry is present in the leakage,
increase the pressure until only clear liquid
drips from the box. If the drippage is corrosive
or harmful to personnel, it should be collected
and piped away.
A common error is to open the external piping
valve wide and then control the drippage by
tightening the packing gland. A combination
of both adjustments is essential to arrive at
the optimum condition. The life of packing
and sleeve depends on careful control more
than any other factor.
FLOWMETER
PRESSURE
GAUGE
PRESSURE
REDUCING
VALVE
STUFFING BOX
FIGURE 9 – CONTROLLED PRESSURE
SYSTEM
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