NK Series End Suction Pumps with Overhung Impeller(s) and
NKV Series Inducer End Suction Pumps with Overhung Impeller(s)

Applications: Designed for handling volatile flammable and inflammable liquids at the process plants in the oil-refining industry. May also be used for handling water.

Design:ANK and ANKV series pump units consist of a centrifugal pump and an induction motor in the explosion-proof version, which are mounted on a common base plate.

The pump and motor shafts are connected by means of a diaphragm flexible coupling. The pump units shall be rigidly anchored to the foundation, and piping shall be also rigidly connected to the pumps.

The pumps as components of the pump units are electrically driven horizontal, end-suction, centreline-supported, back pull-out, single- or two-stage centrifugal pumps with overhung impeller(s). Suction nozzle is axially horizontal and discharge nozzle is radially to the top. Counter flanges have a weld neck.

Pump shaft sealing is by mechanical seals in tandem arrangement, which utilizes a pressurized barrier fluid, neutral to handled medium.

The pump design provides for cooling the mechanical seal chamber (heat barrier) with cooling liquid supplied. In case of using the pumps for handling liquids with a temperature below 90, cooling liquid inlet/outlet holes shall be plugged.

The pump rotor is carried by the oil-bath lubricated antifriction bearings. Inner space of the bearing bracket serves as their oil sump. The design provides for its cooling with liquid supplied into a special chamber of the bearing bracket.

Sense of rotation of pump shaft is shown with a rotation arrow attached to the bearing bracket.

The motor pump units shall be controlled by a process monitoring, control, warning/alarm and emergency trip system as required in PB 09-540-03.

DN
mm
47 - 254
47 - 254
Q
m3/h
680
680
H
m
187
388
p
kg/cm2
12
12
t
o
+120
+120 - +360
n (sync)
rpm
1500, 3000
1500, 3000

Coverage chart of the NK and NKV Series Pumps:

HandledMedia:

, NKV  XX-XX Y2- Refined products up to 120o

, NKV XX-XX-H Y2 - Refined products 120o to 360o

Performance of the NK and NKV Series Pumps:

Pump make Pump parameters
Capacity, m3/h Head, m Speed of rotation, rpm Power input (r=1000 kg/m3), kW Efficiency, % NPSH required, m
NK  15-35 2
NK  15-35- 2
15
35
2955
3
47
3.2
NKV  25-80 2
NKV  25-80-H Y2
25
80
2955
9.1
60
2.3
NK  30-60 2
NK  30-60-H Y2
30
60
2955
8.9
55
5.5
NK  30-120 2
NK  30-120-H Y2
30
120
2934
17.8
55
5.5
NKV  50-55 2
NKV  50-55-H Y2
50
55
2886
11.7
64
2.3
NKV  80-50 2
NKV  80-50-H Y2
80
50
2940
15.6
70
2.4
NK  80-125 2
NK  80-125-H Y2
80
125
1485
57.9
47
6
NKV  200-45 2
NKV  200-45-H Y2
200
45
1480
34
72
2.5
NKV  200-180 2
NKV  200-180-H Y2
200
180
2964
140.1
70
4.5
NKV  125-170 2
NKV  125-170-H Y2
125
170
2975
85.1
72
4
NKV  180-70 2
NKV  180-70-H Y2
180
70
2943
47.7
72
4
NKV  225-120 2
NKV  225-120-H Y2
225
120
2964
95.5
77
4.5
NK  225-120 2
NK  225-120-H Y2
225
120
2964
95.5
77
9
NKV  240-90 2
NKV  240-90-H Y2
240
90
2975
76.4
76
4.5
NK  340-80 2
NK  340-80-H Y2
340
80
1480
108.9
68
5
NKV  360-125 2
NKV  360-125-H Y2
360
125
1479
164
75
2.3
NKV  550-130 2
NKV  550-130-H Y2
550
550
1483
267
73
3
NKV  25-40-H Y2
25
40
2901
4.5
60
1.6
NKV  30-60-H Y2
60
60
2955
8.9
55
4.1
NKV  30-120-H Y2
30
120
2961
17.8
55
4.1
NKV  45-30-H Y2
45
30
2901
5.9
62
1.6
NKV  50-100-H Y2
50
100
2934
21.3
64
1.8
NKV  65-125-H Y2
65
125
2943
38.1
58
4
NKV  90-125-H Y2
90
125
2975
46.4
66
4
NKV  90-140-H Y2
90
140
2975
52.8
66
4
NKV  90-220-H Y2
90
220
2961
81.7
66
4
NKV  125-90-H Y2
125
90
2943
42.6
72
4
NKV  140-135-H Y2
140
135
2975
70.5
73
4
NKV  225-200-H Y2
225
200
2961
157.1
78
4
NKV  230-120-H Y2
330
120
2961
103
73
4.4
NKV  330-150-H Y2
330
150
2964
177.4
76
4
NKV  330-300-H Y2
330
300
2981
354.7
76
4
NKV  340-105-H Y2
340
105
2961
123.1
79
4.3
NKV  340-210-H Y2
340
210
2964
246.1
79
4.3
NKV  350-50-H Y2
350
50
1485
64
74.5
2
NKV  450-70-H Y2
450
70
2961
114.4
75
4

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