NMsg Series Between-Bearings Cartridge-Type Radially Split Barrel-Insert Pumps
Applications: Designed for handling liquefied hydrocarbon gases (with the density up to 510 kg/m3) in the oil-refining industry.
The pumps (pump units) are supplied according to Specifications TU U29.1-34933255-014:2007.
Design: NMsg motor pump units consist of a pump and an induction motor in explosion-proof version, which are mounted on a common fabricated base plate.
Shafts of the pump and motor are connected by means of a diaphragm flexible coupling.
The pump units shall be rigidly anchored to the foundation, and piping shall be rigidly connected to the pumps.
The pumps as components of the pump units are electrically driven horizontal, centreline-supported, multistage radially split barrel-casing centrifugal pumps with a withdrawable cartridge of diffuser ring section type and with rotor axial thrust balancing either by a balance drum (in case of the pump makes NMsg 25-125 Y2 and NMsg 550-500 Y2) or by a balance disc (in case of the pump makes NMsg 360-500 Y2, NMsg 450-400 Y2 and NMsg 450-500 Y2).
The barrel (outer casing of the pump) has flanged suction and discharge nozzles, which are oriented radially to the top. Counter flanges have a weld neck.
The rotor of the pump makes NMsg 25-125 Y2, NMsg 360-500 Y2, NMsg 450-400 Y2 and NMsg 450-500 Y2 is carried by the oil-ring lubricated antifriction bearings with oil-bath.
In case of the pump make NMsg 550-500 Y2 the rotor is carried by the oil-ring lubricated plain bearings with oil-bath.
Pump shaft sealing is by mechanical seals in tandem arrangement, which utilizes a pressurized barrier fluid, neutral to handled medium.
Sense of rotation of pump shaft is shown with a rotation arrow attached to the pump casing or to the bearing housing on the drive side.
DN |
mm |
80 - 350 |
Q |
m3/h |
655 |
H |
m |
560 |
p |
kg/cm2 |
23 |
t |
oС |
+10 - +60 |
n (sync) |
rpm |
3000 |
Coverage chart of the NMsg Series Pumps:
Performance of the NMsg Series Pumps:
Pump make |
Pump parameters |
||||||
Capacity, m3/h |
Head, m |
Speed of rotation, rpm |
Power input (r=463 kg/m3), kW |
Power input (r=510 kg/m3), kW |
Efficiency, % |
NPSH required, m |
|
| NMsg 25-125 U2 | 25 |
125 |
3000 |
8.4 |
9.2 |
47 |
2.4 |
| NMsg 360-500 U2 | 360 |
500 |
291 |
320.5 |
72 |
4.6 |
|
| NMsg 450-400 U2 | 450 |
400 |
299 |
329 |
78 |
||
| NMsg 450-500 U2 | 450 |
410 |
333 |
302 |
77 |
||
| NMsg 550-500 U2 | 550 |
500 |
490 |
444.5 |
78 |
||
Handled Media:
- Liquefied hydrocarbon gases (with the density up to 510 kg/m3) 10oС to 60oС
