PURPOSE

Motor-driven feed pumps are applied in special steam-power plants.

DESIGN

Direct-current motor with power capacity of 90 kW serves for ЭПН-2М drive, alternating-current motor with power capacity of 180 kW – for ЭПН-5 one. Pump liquid ends are uniform and differ in pressure stages number, electric motor type, frame support surface and as a result in weight and dimension characteristics.

Parameter

ЭПН-2М

ЭПН-5

Capacity, t/hr

45

70

Head, m

310

493

Discharge pressure, kgf/sm2

30

48

Inlet pressure, kgf/sm2

0.2 (up to 9)

0.2 (up to 9)

Rotation frequency, rpm

3000

2970

Net positive suction head (available), m

7

6

Water temperature, °С

80

80

Electric motor type

ДП8-80-3

АМШ-112-2

Current type

direct

alternating

Efficiency, %

80

80

Pump power consumption, kW

73

143

ЭПН-5 drawing

Motor-driven feed pumps