Gardner Denver C2500Q QUINTUPLEX, Operating And Service Manual

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7.
Bolt brackets to pump, using 7/8” –
9UNC Grade 8 bolts.
7.
When connecting the suction line to
the suction manifold, provide support
to the suction line independent of the
pump suction manifold. Fluid adds
weight to the suction line.
8.
The use of suction stabilizers is always
recommended.
9.
The discharge line should include
swivels
for flexibility (or hose).
Support the discharge line, and tie it
down with vibration isolators.
10. Allow 1/8” driveline end-float.
POWER END LUBRICATION SYSTEM
Due to the variety of applications and drive
arrangements, the power end lubrication
pump and applicable auxiliary hydraulic
equipment are not furnished with the
quintuplex pump. This pump is designed to
operate with an external oil sump of 100 gal.
Min. capacity.
The lubrication system is very critical to the
pump performance and therefore should be
professionally designed in accordance with
sound engineering practices developed for
similar systems, known otherwise as
hydraulic power units or HPU. The following
discussion will reemphasize some of the
good practices used in designing similar
systems in the past and comment on the
system’s critical components.
Lube System Pump
A positive displacement pump must be
used. Gear type pumps have demonstrated
reliable performance for similar applications
in the past. The pump should have the
largest suction port available for the
selected pump size to minimize losses in
the suction piping.
Lube Pump Suction Piping Sizing and
Requirements
In the past, failure to meet these
requirements has lead to pump damage
because of restricted oil flow in the lube
pump
inlet. Therefore, the following
guidelines, developed as a result of long
experience, should be adhered to closely.
1.
The oil flow velocity through the suc-
tion piping should not exceed 2 ft/sec.
2.
At maximum operating speed the
vacuum reading at the lube pump inlet
must be no more than 10" hg or 5 psi
or 0.28 bar.
3.
The suction strainer should be sized for
oil flow three (3) times larger than the
actual
flow passing through the
strainer.
4.
Power End lubrication system should
be filtered with a minimum 25 micron
filter or finer per API specification
2.9.1.5.
5.
The suction pipe should be kept as
short as possible and free of bends.
6.
Warning devices to monitor lube oil
pressure and temperatures are highly
recommended. The quintuplex pump
operates at very high rod loads and
pressures, and malfunction of the lube
system may result in serious damage
occurring in a very short time.
Therefore, early warning devices are
essential to the successful operation
and should be set according to the
following operating limits:
NOTICE
Maximum lube system pressure
should be set at 150 psi max.
(Relief valve setting.)
Minimum
lube oil operating
pressure is 40 psi. (With hot oil).
Minimum lube pump flow is 45
gpm. Approximate lube pump
design flow should be 55 gpm,
with relief valve controlling flow.
Maximum lube system vacuum at
lube pump inlet 10 Hg or 5 psi or
0.34 bar.