Operation Manual
16
Breaking in New Packing
1. Adjust the engine speed to 1400 rpm.
2. Adjust the discharge pressure to 3,000 psi (200
bar) by slowly closing the bypass valve (all
dump valves closed).
3. When the coolant temperature reaches 120°F
(49°C), increase engine speed to 2100 rpm.
4. Continue to bring the discharge pressure up
to full operating pressure in about three equal
steps while operating 1 minute for each step.
Check the lubrication water and carefully feel
the stufng boxes for excess temperatures.
Stufng boxes and gland nuts should only be
slightly warm to the touch when the pump is
running at the rated operating pressure. Hot
stufng boxes and gland nuts may be caused
by insufcient water lubrication or tight tting
packing. If insufcient lubrication water ow
cannot be corrected by readjusting the needle
valves, stop the pump and correct the problem.
ATTENTION
This procedure is only applicable for 15K and
20K molded packing. It is not required for
plastic packing.
New packing must be broken in to prevent
damage and ensure optimal performance.
Break-in should occur in three to four pressure
increases over a 5 minute period.
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