Xylem AC8584C Series HSCS Base Mounted Centrifugal Pumps User Manual
Page 17
1
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A Mobile Oil, DTE Medium, or equal, meeting the following
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specification will provide satisfactory lubrication. SImilar oils
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can be furnished by all major oil companies. It is the responsi-
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bility of the oil vendor to supply a suitable lubricant.
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(1)
Saybolt viscosity at 100ºF . . . . . . . . . . 215 SSU-240 SSU
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(2)
Saybolt viscosity at 210ºF . . . . . . . . . . . . . . . . . . . 49SSU
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(3)
Viscosity index, minimum. . . . . . . . . . . . . . . . . . . . . . . . 95
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(4)
API gravity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-33
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(5)
Pour point, maximum . . . . . . . . . . . . . . . . . . . . . . . . +20ºF
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(6)
Flash point, minimum . . . . . . . . . . . . . . . . . . . . . . . . 400ºF
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(7)
Additives . . . . . . . . . . . . . . . . . Rust & Oxidation inhibitors
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(8)
ISO viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
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NOTE: Oils fr
om different suppliers should not be mixed.
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Engine oils are not recommended.
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The oil should be a non-foaming, well refined, good grade,
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straight cut, filtered mineral oil. It must be free from water,
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sediment, resin, soaps, acid and fillers of any kind.
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In installations with moderate temperature changes, low
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humidity, and a clean atmosphere, the oil should be changed
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after approximately 1000 hours of operation. The oil should be
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inspected at this stime to determine the operating period
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before the next oil change. Oil change periods may be
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increased up to 2000-4000 hours based on an 8000 hour year.
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Check the oil frequently for moister, dirt, or signs of “break-
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down,” especially during the fist 1000 hours.
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4. Mechanical Seals
a.
Mechanical seals are precision products and should be
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treated with care. Use special care when handling seals.
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Clean parts are essential to prevent scratching the finely
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lapped sealing faces. Even light scratches on these faces
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could result in leaky seals.
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b. Normally, mechanical seals require no adjustment or main-
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tenance, except routine replacement of worn, or broken
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parts.
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c. A mechanical seal which has been used should not be put
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back into service until sealing faces have been replaced or
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relapped. (Relapping is generally economical only in seals
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two inches in size and above.)
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Four important rules which should always be followed for
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optimum seal life are:
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1.
Keep the seal faces clean as possible.
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2.
Keep the seal as cool as possible.
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3.
Assure that the seal always has proper lubrication.
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4.
If seal is lubricated with filtered fluid, clean filter
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frequently.
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5. Packing Seal
When a pump with packing is first started it is advisable to
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have the packing slightly loose without causing an air leak. As
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the pump runs in, gradually tighten the gland bolts evenly. The
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gland should never be drawn to the point where packing is
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compressed too tightly and no leakage occurs. This will cause
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the packing to burn, score the shaft sleeve and prevent liquid
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from circulating through the stuffing box cooling the package.
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NOTE: Eccentric run-out of the shaft or sleeve thr
ough the
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packing could result in excessive leakage that cannot be com-
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pensated for. Correction of this defect requires shaft and/or
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sleeve replacement. Packing should be checked frequently
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and replaced as service indicates. Six months might be a rea-
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sonable expected life, depending on the operating conditions.
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6. Cleaning Without Dismantling Pump
A short section of pipe so designed that it can be r
eadily
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dropped out of the line can be installed adjacent to the suction
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flange. With this arrangement, any matter clogging the
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impeller is accessible by removing the pipe section.
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If the pump cannot be freed of clogging after the above
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methods have been tried, dismantle the unit as previously
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described to locate the trouble.
CAUTION:
Do not over oil; this causes the bearings to run hot.
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The maximum desirable bearing housing operating
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temperature for all ball bearings is 180º)F. Should the
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temperature of the bearing frame exceed 180º)F (measured
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by thermometer) shut down pump to determine the cause.
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FIGURE 11 – TRICO OILER