Compliance: Short-coupled pump in accordance with ISO 2858
NBG 250-200-450/455 AIAF2A1ESBQQEYW3 The non-self-priming single-stage volute centrifugal pump is designed in accordance with ISO 5199, and its dimensions and rated performance comply with ISO 2858 (16 bar). The flanges are of PN 16 type, with dimensions conforming to EN 1092-2. The pump is equipped with an axial suction port, a radial discharge port, a horizontal shaft, and a back-pull-out design, allowing maintenance personnel to disassemble the motor, motor bracket, cover, and impeller without loosening the pump casing or pipelines. The unbalanced O-type shaft seal meets the requirements of DIN EN 12756. An air-cooled asynchronous motor is closely coupled to the pump.
Controller:
Frequency converter: None
Pressure sensor: N
Liquid:
Liquid conveyed: Water
Liquid temperature range: -25 .. 120 °C
Liquid temperature during operation: 20 °C
Density: 998.2 kg/m³
Technical Data:
Pump speed basis: 1,490 rpm
Rated flow rate: 658.5 m³/h
Rated head: 64.1 m
Impeller actual diameter: 455 mm
Impeller nominal speed: 450
Impeller type: Standard
Shaft seal configuration: Single
Main shaft seal: BQQE
Shaft seal code: BQQE
Curve tolerance: ISO9906:2012 3B
Bearing design: Standard
Materials:
Pump housing: Cast iron
Pump housing: EN-GJL-250
Pump housing: ASTM class 35
Wear ring: Brass
Wear ring material: CuZn34Mn3AI2Fe1-C
Impeller: Cast iron
Impeller material: EN-GJL-200
Impeller material: ASTM class 30
Internal pump housing coating: CED
Shaft: Stainless steel
Shaft material: EN 1.4462
Installation:
Maximum ambient temperature: 40 °C
Maximum operating pressure: 16 bar
Pipeline connection standard: EN 1092-2
Inlet size: DN 250
Outlet size: DN 200
Pressure rating for pipe connection: PN 16
Bearing lubrication: Grease
Pump casing with support feet: Yes
Yes = With support block, No = Without support block: N
Electrical Data:
Motor model: 315LA
Rated power - P2: 160 kW
Power supply frequency: 50 Hz
Rated voltage: 3 x 380-400/660-690 V
Rated current: 283-269/163-156 A
Starting current: 770 %
Cos phi - Power factor: 0.89
Rated speed: 1,490 rpm
Efficiency: IE4 96.6%
IE efficiency class: IE4
Motor full-load efficiency: 96.6 %
Motor efficiency at 3/4 load: 96.4 %
Motor efficiency at 1/2 load: 95.5 %
Motor pole count: 4
Enclosure rating (IEC 34-5): 55 (Protect. water jets/dust)
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