IOM/GK(P)/CONICAL ISSUE DATE: 10.11.2015
Page 41 LAST REV. DATE: 01.08.2019
Notes:
1.
The bearing arrangements mentioned above are suitable for suction
pressure less than 5 kg/cm
2
. For applications involving suction pressure
above 5 kg/cm
2
, please refer to RO/Marketing.
2.
Axial running clearance shall be less than 0.45 mm for all above bearing
arrangements.
6.4 Lubrication:
The oil used should be highly refined straight mineral product of high
demulsibility, free from running and acid forming tendencies. Detergent oil may
cause foaming and emulsion difficulties, hence should not be used. The oil
should be filled in with the help of constant level oiler. For fitting and operating
instructions, please refer instructions mentioned in this manual. The lubrication
oil should confirm to the following grades of oil available in market.
Recommended oil grade for 10-50
0
C ambient temperature is ISO VG 68.
6.5
Cooling of stuffing box, bearing housing and pump pads:
Clean non-corrosive fresh water is normally used as the cooling medium.
Corrosion resistant material would be selected for cooling chamber i.e.
Casing cover and bearing housing when using corrosive water for cooling
purpose. Whenever cooling medium is other than pure water, please contact
KBL representative.
6.5.1
Cool the mechanical seal, stuffing box when pumping liquid temperature is
above 140
0
C (provided seal also is suitable for 140
0
C).
6.6
Quantity of stuffing box cooling water with respect to temperature and
nominal impeller diameter:
Full nominal
impeller dia. in cm.
Cooling water quantity at various pumping liquid temperatures m
3
/hr.
110
0
C
150
0
C
200
0
C
250
0
C
300
0
C
13
0.16
0.18
0.24
0.31
0.43
16
0.16
0.18
0.24
0.31
0.43
20
0.16
0.18
0.24
0.31
0.43
26
0.21
0.24
0.31
0.40
0.54
32
0.23
0.28
0.37
0.48
0.63
38/40
0.26
0.31
0.43
0.55
0.71
43/50
0.45
0.55
0.65
0.75
1.00
Maximum temperature of cooling water at outlet = 50
0
C.
Maximum permissible cooling water pressure = 6.0 kg/cm
2
.
