Grundfos NK 50-125/129 A2F2AE-SBQQE

Grundfos NK/NKG standard and block pumps are versatile pumps, suitable for a wide range of applications that demand reliable and efficient supply. The NK/NKG series consist of non-self-priming, single-stage centrifugal volute pumps with axial suction port, radial discharge port and a horizontal shaft. Thanks to their robustness and reliability, the Grundfos NK and NKG pumps are ideal for use in the water supply, industrial pressure boosting, industrial liquid transport, the indoor climate (heating, ventilation and air conditioning), irrigation and process industries. The pumps are easy to maintain as the motor, coupling, bearing housing and impeller can be removed without removing the pump housing or pipework.

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Extensive product information

Applications

• Water supply
• Industrial pressure boosting
• Industrial liquid transport
• Indoor climate (air conditioning, heating and ventilation)
• Irrigation

Features and benefits

• Optimized hydraulics in housing and impeller ensures unimpeded fluid flow
• O-ring seal between pump housing and cover, so there is no risk of leakage
• Impeller housing and wear ring made of different materials, provides improved corrosion resistance and no 'sticky' elements
• Back pull-out design for easy disassembly for service
• The pump is electrophoretically coated for increased corrosion resistance
• Available with IE3 and IE4 motors
• PN 10/16 and 25 bar
• Temperatures up to 180 degrees Celsius

Specifications

Productnaam NK 50-125/129 A2F2AE-SBQQE
Productnummer 98990816
EAN nummer 5712604803998

Materials

Pump housing Cast iron
Pump housing EN-GJL-250
Pump housing ASTM class 35
Wear ring Brass
Impeller Cast iron
EN-GJL-200
ASTM class 30
Shaft Stainless steel
EN 1.4301
AISI 304
Internal coating pump housing CED
Material code A
Code for rubber E.

Installation details

Maximum ambient temperature 55 ° C
Maximum operating pressure 16 bar
Pipe connection standard EN 1092-2
Suction connection type DIN
Press connection type DIN
Size of the suction connection DN 65
Pressure connection size DN 50
Pressure stage for pipe connection PN 16
Coupling type Flexible w/spacer
Base frame design EN/ISO
Grouting N
Code for pipe connection F.

Medium

Fluid handled Water
Liquid temperature range -25 .. 120 °C
Medium temperature during operation 20 ° C
Density 998.2 kg / m³

Electrical data

Engine type SIEMENS
IE efficiency class IE3
Rated power – P2 0.55 kW
Mains frequency 50 Hz
Rated voltage 3 x 220-240D/380-420Y V
Rated current 2.31-2.09/1.32-1.2 A
Starting current 590-590 %
Cos phi – power factor 0.78
Rated speed 1440 rpm
Efficiency IE3 80.8%
Motor efficiency at rated load 80.8-80.8 %
Motor efficiency at 3/4 power 81.1-81.1 %
Motor efficiency at half power 79.3-79.3 %
Pool number 4
Enclosure class (IEC 34-5) IP55
Insulation class (IEC 85) F.
Motor protection NONE
Engine No. 99901328

Other information

Minimum Efficiency Index, MAY ≥ 0.60
Net weight 106 kg
Gross weight 120 kg
Transport volume 0.279 m³
Frequency converter NONE
Pressure sensor N

Grundfos NK 50-125/129 A2F2AE-SBQQE