Giant GP8135A, Инструкция по эксплуатации / Руководство по ремонту и обслуживанию

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INSTALLATION INSTRUCTIONS
The stated figures are fore maximum
pressure and maximum. speed (rpm)
and apply for interval operation with cold
water.
Required NPSH refers to water (specific
weight 0.062 lbs/ft
3
- 1kg/dm
3
, viscosity
1° E) at maximum permissible pump
revolutions.
Fluid medium: Clean water filtered to 50
microns.
For higher water temperatures, use a
separate crankcase cooling system, for
details contact Giant Industries.
Operation and Maintenance
Check oil level prior to starting and
ensure trouble free-water supply.
Important!
If there is a
danger of frost
,
the water in the pump and in the pump
fittings (particularly the unloader valve)
must me emptied. The second discharge
port can also be used and the pump run
“dry” for 1-2 minutes for this purpose.
The following oils may be use: 85-90W
Industrial Gear Lube oil (Giant’s p/n
01154), or ISO VG 220 GL4 (e.g. Aral
Degol BG220) or SAE 90 GL4 gear
oil. Use 4.2 gallons (16 liters of one of
the above oils). Initial change after 50
operating hours and then every 1000
operating hours after one year latest.
Important! When operating in damp
places or with high temperature
fluctuations condensate (frothy oil) might
appear in the gearbox. The oil must be
changed immediately.
NPSH values must be observed.
Cooling the Gear Oil
Make sure that suction pulsation is
sufficiently dampened; water column
resonance must be avoided.
Definition of intermittent operation:
operation at full performance for not more
than 20 minutes per hour (total time).
This means the pump can run with no
pressure or it is completely stopped. For
example, this can be full load operation
for 5 minutes four times an hour with 10
minute breaks in between or continuous
full load operation for 20 minutes followed
by a 40 minute break.
When starting up for work, the pump must
run first at zero pressure for approximately
1 minute.
Important! The GP8135A/GP8140A
pumps have a black arrow on the
reduction gear, which shows the preferred
direction of rotation. The pumps can be
delivered either with the gear on the left
side or the right side, which eases the
planning of assembling units with regard
to rotational direction.
Gear on left side (from the front of the
pump) = optimal rotation: to the left
(counterclockwise)
Gear on the right side (from the front of
the pump) = optimal rotation to the right
(clockwise)
The preferred/optimal direction of rotation
ensures the motion of the connecting rods
correctly slings the oil onto the crosshead
guides. Where continuous operation is
involved, this is a particular advantage.
The pump can also be run against the
recommended direction of rotation if
operated periodically or at reduced
pressure. If so, the pump has to be run
in this direction to smoothen the bearing
areas. This is done by a one-time
operation at zero pressure for at least 30
minutes; thereafter the pressure must be
slowly increased over the next hour to