RS – Multi-Stage, I-280
Centrifugal Pump 280 – 16.03.EN
26
X. MAINTENANCE.
Generally the pump does not need continuous
supervision. The pump should always run quietly and
smoothly, without vibration. To ensure such operation,
the following maintenance schedule should be applied
at regular intervals during operation of the pump.
Occasional visual checks are recommended. Data
should be recorded periodically for each pump to keep
track of maintenance which has been performed and to
note operational problems. A sample maintenance
record sheet is provided for this purpose at the front of
this manual.
Regular inspection and service are
essential for safe operation of the pump in
ATEX applications.
NOTE
Parts marked with * are options or vary by
pump or bearing frame size.
Daily Inspection:
Visually inspect unit.
Check bearing cooling flow rates, if applicable,
refer to Table 13.
Check for leakage at mechanical seal.
Check that oil level is at center of bullseye, if
applicable. If equipped with a constant level oiler*,
check oil level in the constant level oiler and refill
as required.
Weekly Inspection:
Check power (amps) readings.
Check pump discharge pressure. Prescribed
operating discharge pressure should never drop
below 90 percent of design point pressure.
Check vibration on pump and driver bearings.
Vibration should NOT exceed 1.5 of overall
displacement (unfiltered) peak to peak mils
(0.001”) at 3600 RPM and 3.0 of overall
displacement (unfiltered) peak to peak mils
(0.001”) at 1750 RPM.
Monthly Inspection:
Check coupling alignment.
If necessary, grease coupling, but DO NOT over
grease.
Check foundation bolts.
Semi-annual Inspection:
Change oil. DO NOT add excess oil.
Check coupling alignment due to settling of
foundation.
If stand-by pumps are installed, it is advisable to
operate pumps on a rotational system to give
each pump a periodic duty. This ensures that
stand-by pumps will have periodic operation and
always be in good condition for instant start-up.
50/300 Hours
The first oil change should be carried out after 50
hours of operation. The second oil change should
be carried out after 300 hours of operation
1000 Hours
After the second oil change at 300 hours
subsequent oil changes should be effected at
intervals of 1000 hours of operation.
20,000 Hours - Overhaul
For pump overhaul, complete Section XI, Service
and Repair.
A. LUBRICATION OF PUMP BEARINGS.
CAUTION
Pumps are shipped without oil and
bearing frames should be filled with oil before
starting the pumping unit. Operation of the unit
without proper lubrication can result in
overheating of the bearings, bearing failures,
pump seizures and actual breakup of the
equipment, exposing operating personnel to
injury.
Ball Bearings (16 and 18). The radial ball bearing and
the thrust ball bearings are lubricated by oil in the
bearing frame. The thrust ball bearings are installed
back to back. Replace the ball bearings when
disassembling the pumping unit for mechanical seal
service. Refer to Figures 13, 14, and 15, for the location
of parts identified by item numbers.
Fill the bearing frame (99) with oil (refer to Table 12 for
oil recommendations) through the breather vent (405)
until oil can be seen in the center of the oil view sight
(143)*.
To change oil, unscrew oil cap pipe plug (425) in
bearing caps (35 and 37) and drain oil. Flush bearing
frame with petrol or benzol. Slowly rotate the shaft by
hand during flushing. Replace oil cap pipe plug and fill
To Next Page
Loading...
