Flowserve LNN - Manual (Page 12)

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14
Page 12 of 56
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3.3.5 Bearing housing
Two grease nipples enable grease lubricated
bearings to be replenished between major service
intervals. For oil lubricated bearings, a constant level
oiler is fitted.
3.3.6 Stuffing box housing
The stuffing box housing has a spigot (rabbet) fit
between the pump casing and bearing housing for
optimum concentricity. The design enables a
number of sealing options to be fitted.
3.3.7 Shaft seal
The mechanical seal(s) attached to the pump shaft
seals the pumped liquid from the environment.
Gland packing may be fitted as an option.
3.3.8 Driver
The driver is normally an electric motor. Different drive
configurations may be fitted such as internal
combustion engines, turbines, hydraulic motors etc
driving via couplings, belts, gearboxes, drive shafts etc.
3.3.9 Accessories
Accessories may be fitted when specified by the
customer.
3.4 Performance and operating limits
This product has been selected to meet the
specifications of your purchase order. See section 1.5.
The following data is included as additional information to
help with your installation. It is typical, and factors such
as temperature, materials, and seal type may influence
this data. If required, a definitive statement for your
particular application can be obtained from Flowserve.
3.4.1 Operating limits
Pumped liquid temperature limits
-20 to +80 ºC
(-4 to +176 ºF)
High temperature liquid limits *
-20 to +130 ºC
(-4 to +266 ºF)
Maximum ambient temperature
-20 to +40 ºC
(-4 to +104 ºF)
Maximum soft solids in suspension *
up to 3 % by volume
(refer for size limits)
Maximum pump speed refer to the nameplate
* Subject to written agreement from Flowserve.
3.4.2 Pump and impeller data
Pump size
Hydraulic
Impeller
type
Impeller
minimum
passage size
mm (in.)
Nominal
wear ring
diameter
mm (in.)
Mean radial
wear ring
clearance
mm (in.)
200LNN300
A
22.4 (0.90) 215 (8.5)
0.3 (0.012)
200LNN325 24.3 (0.96) 240 (9.5)
200LNN375
A and B
25.5 (1.00) 215 (8.5)
200LNN400 29.6 (1.20)
240 (9.5)
200LNN475 24.0 (0.95)
200LNN500 17.5 (0.70) 215 (8.5)
200LNN525 A 30,0 (1.20)
240 (9.5) 200LNN600 A and B 16.0 (0.63)
250LNN325 D 30.1 (1.20)
250LNN375
A and B
27.8 (1.10)
264 (10.4) 250LNN475 32.5 (1.30)
250LNN600 22.0 (0.87)
250LNN650 32.0 (1.26) 330 (13.0)
300LNN325
A
20.0 (0.78)
300 (11.8)
300LNN450 30 (1.20)
300LNN475
A and B
36.3 (1.40) 330 (13.0)
300LNN500 36.8 (1.40) 300 (11.8)
300LNN575 42.9 (1.70) 350 (13.8)
300LNN600 30.0 (1.20) 300 (11.8)
300LNN625 25.0 (1.00)
330 (13.0) 300LNN750 27.9 (1.10)
350LNN375 A 25.0 (0.94)
350LNN475
A and B
45.4 (1.80)
380 (15.0)
350LNN575 41.2 (1.60)
350LNN725 48.0 (1.90)
350LNN900 33.0 (1.30)
400LNN600 A 46 (1.80)
420 (16.5)
400LNN600 D 45 (1.77)
400LNN725 A 53.3 (2.10)
400LNN725 B 45 (1.77)
400LNN800
A
50 (1.97) 470 (18.5)
400LNNA875 40 (1.57)
440 (17.3) 0.34 (0.013)
400LNN900 45.7 (1.80)
400LNN925 F 50 (1.97) 496 (19.5)
0.3 (0.012)
500LNN600
A
60 (2.36) 440 (17.3)
500LNN650 61 (2.40)
470 (18.5) 500LNN650 B 55 (2.16)
500LNN650 C 61 (2.4)
500LNN700
A
48.3 (1.90) 440 (17.3)
500LNN775 53.3 (2.10)
500 (19.7) 0.34 (0.013)
500LNN775 B 49 (1.93)
500LNN775 C 50 (1.97)
500LNN950
A
63.5 (2.50)
500LNN1000 45 (1.77)
500LNN1150 40.6 (1.60)
500LNN1250 37 (1.45)
600LNN750 80 (31.5)
564 (22.2)
0.45 (0.018)
600LNN750 B 70 (2.75)
600LNN950 A and C 68.6 (2.70) 620 (24.4)
600LNN975 A 71.1 (2.80)
564 (22.2)
600LNN975 B 60 (2.36)
600LNN1200 A 61 (2.40)
582 (22.9) 600LNN1200 B 50 (1.97)
600LNN1200 C 55 (2.16)
700LNN1225 A 88.9 (3.50)
700 (27.6) 700LNN1225 B 70 (2.75)
700LNN1225 D 60 (2.36)
900LNN1200 A 100 (3.94) 866 (34.1)
1000LNN750 A 85 (3.35)
658 (25.9)
0.55 (0.022)
1000LNN750 C 90 (3.54)
1000LNN800 A 80 (3.15) 0.5 (0.197)
Clearances for non-metallic wear rings are smaller,
typically 50 to 65% of those for the standard metallic rings shown
above.