Grundfos NB 50-315/321 ASF2ABQQE

Grundfos offers an almost unlimited range of closely coupled (NB / NBG) end suction pumps, which are very suitable for challenging applications due to their robustness and reliability. The Grundfos NB and NBG pumps are single-stage centrifugal standard block pumps with axial suction port, radial discharge port and a horizontal shaft and are not self-priming. The standard and block pumps are extremely reliable, energy efficient and can be used for a wide range of applications due to enormous configuration options.

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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

• Capacity up to 1300 m3/h
• Head up to 160 mWk
• Optimized hydraulics in housing and impeller ensures unimpeded fluid flow
• O-ring seal between pump housing and cover, so no risk of leakage
• Highly corrosion resistant
• Available with IE2 and IE3 motors
• Available with various shaft seal and material variants
• PN 10, 16 and 25 bar

Specifications

Productnaam NB 50-315/321 ASF2ABQQE
Productnummer 98975680
EAN nummer 5712604547298

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
Size of the suction connection DN 65
Pressure connection size DN 50
Pressure stage for pipe connection PN 16
Bearing Lubrication Grease
Pump house with feet Yes
Filling block Y
Code for pipe connection F2

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 55 kW
Mains frequency 50 Hz
Nominal voltage 3 x 380-420D / 660-725Y V.
Rated current 99.0-90.0/57.0-52.0 A
Starting current 670-670 %
Cos phi - power factor 0.89
Rated speed 2975 rpm
Efficiency IE3 94.3%
Motor efficiency at rated load 94.3-94.3 %
Motor efficiency at 3/4 power 94.5-94.5 %
Engine efficiency at half power 93.9-93.9 %
Pool number 2
Enclosure class (IEC 34-5) IP55
Insulation class (IEC 85) F.
Motor protection PTC
Engine No. 99032151
Mont. regulations according to IEC 34-7 IM B35

Other information

Minimum Efficiency Index, MEI ≥ 0.56
Net weight 542 kg
Bruto gewicht 567 kg
Transport volume 0.821 m³
Country of origin HU
HS code 84137051
Frequency converter NONE
Pressure sensor N

Grundfos NB 50-315/321 ASF2ABQQE