BJM Pumps PGV220-575T - Manual (Page 16)

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3. Required oil volume: As Table-2
Pump Model PGV55, 75 PGV110 PGV220
Required oil volume (L) 1.3 1.6 5.8
Table 2 – Required Oil Volume in submersible pumps
4. Motor chamber check-When much water leakage is detected upon oil chamber
check, inspect further the motor chamber.
• Should any leakage into the motor chamber be detected, the shaft seal
must be checked for abnormal wear and other fault. In this case, the pump
shall be overhauled. Follow Section 8 for the detailed overhauling
procedure.
• If its measured insulation resistance is 20MΩ and over after adequately
dried, the stator is available for further continued use.
Periodic Inspection:
Periodically inspect the mechanical seal (most important check item), impeller,
bottom plate, dust seal, strainer, etc. to check that they are abnormal-free.
In addition, inspect the insulation resistance.
1) Oil chamber and shaft seal (mechanical seal) in case of continuous running; inspect
them at least once every 6 months.
2) Insulation resistance- check once per year. The pump motor may be further used
provided that the measured value is 1MΩ and over.
3) Impeller- in addition to periodic inspection, carefully inspect it when the suction
(pumping) capacity decreases, too. Refer to section 6.
4) Other Inspection- check the bolts and nuts for loose, damaged and deformation.
5) Overhauling- overhaul the pump at least once a year, though depending on the
service conditions, to inspect each component/part and replace any abnormally-
abrased part or faulty part with new one and clean adequately other parts available
for further use in thinner or washing oil. In addition, refill fresh oil in the oil chamber.
• Each seal packing may be possibly damaged by over-hauling work. It
is therefore recommendable to stock and provide the spare parts
recommended in Section-7.
6) Inspection of Pumping Capacity- various causes for the decreased pumping capacity
are as described in section 12 “troubleshooting”. The causes by the impeller, bottom
plate, etc. are described hereunder.
1. Impeller- check whether or not the water passage is
narrowed and the pump function is disturbed by solids
adhered to the central boss of the impeller and between
vanes.
2. Passage in bottom plate and casing- check whether or not
the passage is narrowed by solids adhered to the bottom
plate and the casing.
7) Recommended Spare Parts- it is recommendable to stock the following parts which
may require replacement within 1 to 2 years from startup of the initial running.