Centrifugal multi-sectional vertical pumps of CNSv type
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Application and design:
The pumps CNSv are used to feed water for the steam boilers of low and
middle power and are applied at the installations with pressure being
increased and for the industrial equipment, public and housing
construc-tion work, as well as for providing the proper circulation of hot
and cold water. In multi-stage pumps the flow of liquid being pumped is
moved in consecutive order by means of several impellers, mounted on the
same shaft. The case of the multistage sectional pump consists of separate
sections. Such sectional construction of the pump case allows to increase
or to decrease the head without changing its capacity.
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Liquid to be pumped:
Centrifugal, sectional, vertical pumps of CNSv type and electric pump units
on their base are intended for handling water and other non-aggressive and
fire-resistant liquids with pH = 7...9,2, and a temperature not exceeding
393K (120°C), with mechanical impurities not exceeding 0,1% by mass, and
solid particles not exceeding 0,1mm in size.
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Conventional alphanumeric designation:
For example:
CNSv20-120-1 YXL4 TY3631-166-05747979-2001
CN - is the centrifugal pump;
S - is the sectional pump;
v - is the vertical pump;
20 - capacity, m3/h;
120 - head, m;
1 - arrangement of the branch pipes;
YXL or T -climatic version;
4 or 2 - location category;
Conventional alphanumeric designations adopted for the characteristic curves:
Q - capacity, m3/hour;
P - head, m;
N - maximum consumed power, kW;
n - rotational speed, rpm;
 -
efficiency, %;;
 - admissible positive suction head, m;
Summary table of the technical data of multi-sectional vertical pumps of CNSv type.
| Type of the unit |
Capacity, m3/h |
Head, m |
Rotational speed, rpm |
Consumed power, кW |
Admissible positive suction head, m |
| CNSv12.5-40 |
12.5 |
40.00 |
2950 |
3.80 |
0.00 |
| CNSv12.5-60 |
12.5 |
60.00 |
2950 |
5.20 |
0.00 |
| CNSv12.5-80 |
12.5 |
80.00 |
2950 |
7.60 |
0.00 |
| CNSv12.5-100 |
12.5 |
100.00 |
2950 |
9.50 |
0.00 |
| CNSv20-45 |
20 |
45.00 |
2950 |
4.20 |
0.00 |
| CNSv20-70 |
20 |
70.00 |
2950 |
7.20 |
0.00 |
| CNSv20-95 |
20 |
95.00 |
2950 |
10.20 |
0.00 |
| CNSv20-120 |
20 |
120.00 |
2950 |
13.20 |
0.00 |
Pump inlet pressure, MPa (kgf/cm2), maximum: 0,4 (4)
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