KIRLOSKAR CPHM - Annual Maintenance Procedures; Mechanical Seal Maintenance

IOM/CPHM/DEC19/01 ISSUE DATE:14-12-2019
Page 15 | 48 REVISION NO.1
5. MAINTENANCE:
Preventive maintenance schedule is the periodical checks and precautions by which
possibilities of failures and break-down are minimized.
5.1 Daily Checks:
5.1.1 An hourly record of suction and delivery pressure, discharge quantity input to the
pump driver should be maintained.
5.1.2 Bearing temperature, oil level, stuffing box leakage/stuffing box temperature.
5.1.3 Noise and the vibrations are the first signs of impending troubles like cavitation, air
lock, bearing failure, choking of impeller or casing and such other operating troubles.
The pump performance should therefore be checked for noise and the vibrations.
5.2 Periodical checks:
5.2.1 The temperature of the bearing should be measured by a thermometer. Safe maximum
temperature a bearing can attain is 35°C above ambient.
5.2.2 The lubricants of the bearings should be checked. The lubricant might get
contaminated with foreign material or get blackened due to overheating. In such cases,
bearings should be flushed and charged with fresh lubricants.
5.2.3 Check the stuffing box leakage, normal leakage should be sufficient to dissipate heat
generated. In case the packings are worn out, all the packing rings should be replaced.
Replacement of one or two rings or addition of rings should never be done.
5.2.4 The alignment of pump unit should be checked. Due to operational vibrations,
atmospheric temperature or stress induced by the weight of piping, the alignment may
get disturbed.
5.2.5 Sufficient quantity of suitable type of lubricant and stuffing box packing should be
kept for daily and emergency use.
5.2.6 Calibrate the measuring instruments.
Sr. No. PUMP SIZE CASING IMPELLER
CASING
COVER
BRG. BRKT. &
SHAFT
35 150/32N 38 41 16 4
36 80/40 39 42 17 4
37 80/40N 39 43 17 4
38 100/40 40 44 17 4
39 125/40 41 45 17 4
40 125/40N 41 46 17 4
41 150/40 42 47 17 4
42
125/26
(2900RPM)
31 33 11 5
43 200/38M 43 34 19 6
44 200/46 44 35 20 6
45 150/52 49 51 25 6
46 125/45 47 49 23 7
47 150/43 48 50 24 8
48
125/32
(2900 RPM)
49 51 15 8