Grundfos NK 50-315/285 A2-F-A-E-GQQE
Product ID: 98323652
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Grundfos NK 50-315/285 A2-F-A-E-GQQE
Grundfos NK 50-315/285 A2-F-A-E-GQQE
NK 50-315/285 A2-F-A-E-GQQE
Non-self-priming, single-stage, centrifugal volute pump designed according to ISO 5199 with dimensions and rated performance according to EN 733. Flanges are PN 16 with dimensions according to EN 1092-2. The pump has an axial suction port, a radial discharge port and horizontal shaft. It is of the back pull-out design enabling removal of the coupling, bearing bracket and impeller without disturbing the motor, pump housing or pipework. The unbalanced rubber bellows shaft seal with reduced seal face is according to DIN EN 12756. The pump is fitted with a foot-mounted, fan-cooled asynchronous motor. Pump and motor are mounted on a common base frame.
| Specification | Value | |
|---|---|---|
| Liquid: | ||
| Pumped liquid: | Water | |
| Liquid temperature range: | -25 .. 60 °C | |
| Liquid temperature during operation: | 20 °C | |
| Density: | 998.2 kg/m³ | |
| Technical: | ||
| Speed for pump data: | 2955 rpm | |
| Rated flow: | 76.7 m³/h | |
| Rated head: | 100 m | |
| Actual impeller diameter: | 285 mm | |
| Impeller nom: | 315 mm | |
| Primary shaft seal: | GQQE | |
| Secondary shaft seal: | NONE | |
| Curve tolerance: | ISO9906:2012 3B | |
| Materials: | ||
| Pump housing: | Cast iron | |
| EN-GJL-250 | ||
| ASTM A48-40 B | ||
| Impeller: | Cast iron | |
| EN-GJL-200 | ||
| ASTM A48-30 B | ||
| Rubber: | EPDM | |
| Wear ring mat.: | Bronze (CuSn10) | |
| Installation: | ||
| Maximum ambient temperature: | 55 °C | |
| Maximum operating pressure: | 16 bar | |
| Flange standard: | EN 1092-2 | |
| Pump inlet: | DN 65 | |
| Pump outlet: | DN 50 | |
| Pressure rating: | PN 16 | |
| Coupling type: | Spacer | |
| Base frame: | EN / ISO | |
| Electrical data: | ||
| Motor type: | SIEMENS | |
| IE Efficiency class: | IE3 | |
| Rated power - P2: | 37 kW | |
| Mains frequency: | 50 Hz | |
| Rated voltage: | 3 x 380-420D/660-725Y V | |
| Rated current: | 68,0-63,0/39,0-36,0 A | |
| Starting current: | 670-670 % | |
| Cos phi - power factor: | 0,87 | |
| Rated speed: | 2955 rpm | |
| Efficiency: | IE3 93,7% | |
| Motor efficiency at full load: | 93.7-93.7 % | |
| Motor efficiency at 3/4 load: | 93.9-93.9 % | |
| Motor efficiency at 1/2 load: | 93.5-93.5 % | |
| Number of poles: | 2 | |
| Enclosure class (IEC 34-5): | 55 Dust/Jetting | |
| Insulation class (IEC 85): | F | |
| Lubricant type: | Grease | |
| Others: | ||
| Minimum efficiency index, MEI �?�: | 0.50 | |
| ErP status: | EuP Standalone/Prod. | |
| Net weight: | 506 kg | |
| Gross weight: | 569 kg | |
| Shipping volume: | 1.38 m³ | |