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°Ñ, 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 |
oÑ |
+120 |
+120 - +360 |
n (sync) |
rpm |
1500, 3000 |
1500, 3000 |
Coverage chart of the NK and NKV Series Pumps:
Handled Media:
ÍÊ, NKV XX-XX Y2 - Refined products up to 120oÑ
ÍÊ, NKV XX-XX-H Y2 - Refined products 120oÑ to 360oÑ
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 Ó2 NK 15-35-Ã Ó2 |
15 |
35 |
2955 |
3 |
47 |
3.2 |
| NKV 25-80 Ó2 NKV 25-80-H Y2 |
25 |
80 |
2955 |
9.1 |
60 |
2.3 |
| NK 30-60 Ó2 NK 30-60-H Y2 |
30 |
60 |
2955 |
8.9 |
55 |
5.5 |
| NK 30-120 Ó2 NK 30-120-H Y2 |
30 |
120 |
2934 |
17.8 |
55 |
5.5 |
| NKV 50-55 Ó2 NKV 50-55-H Y2 |
50 |
55 |
2886 |
11.7 |
64 |
2.3 |
| NKV 80-50 Ó2 NKV 80-50-H Y2 |
80 |
50 |
2940 |
15.6 |
70 |
2.4 |
| NK 80-125 Ó2 NK 80-125-H Y2 |
80 |
125 |
1485 |
57.9 |
47 |
6 |
| NKV 200-45 Ó2 NKV 200-45-H Y2 |
200 |
45 |
1480 |
34 |
72 |
2.5 |
| NKV 200-180 Ó2 NKV 200-180-H Y2 |
200 |
180 |
2964 |
140.1 |
70 |
4.5 |
| NKV 125-170 Ó2 NKV 125-170-H Y2 |
125 |
170 |
2975 |
85.1 |
72 |
4 |
| NKV 180-70 Ó2 NKV 180-70-H Y2 |
180 |
70 |
2943 |
47.7 |
72 |
4 |
| NKV 225-120 Ó2 NKV 225-120-H Y2 |
225 |
120 |
2964 |
95.5 |
77 |
4.5 |
| NK 225-120 Ó2 NK 225-120-H Y2 |
225 |
120 |
2964 |
95.5 |
77 |
9 |
| NKV 240-90 Ó2 NKV 240-90-H Y2 |
240 |
90 |
2975 |
76.4 |
76 |
4.5 |
| NK 340-80 Ó2 NK 340-80-H Y2 |
340 |
80 |
1480 |
108.9 |
68 |
5 |
| NKV 360-125 Ó2 NKV 360-125-H Y2 |
360 |
125 |
1479 |
164 |
75 |
2.3 |
| NKV 550-130 Ó2 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 |
