Compliance: Short-coupled pump conforming to ISO 2858
NBG 300-250-500/525 AIAF2AESBQQEWW5 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: 990 rpm
Rated flow rate: 666.6 m³/h
Rated head: 35.73 m
Impeller actual diameter: 525 mm
Impeller nominal speed: 500
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 1.4301
Shaft material: AISI 304
Installation:
Maximum ambient temperature: 40 °C
Maximum operating pressure: 16 bar
Pipeline connection standard: EN 1092-2
Inlet size: DN 300
Outlet size: DN 250
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: 315M
Rated power - P2: 90 kW
Power supply frequency: 50 Hz
Rated voltage: 3 x 380-400/660-690 V
Rated current: 170-162/98.0-93.8 A
Starting current: 700 %
Cos phi - Power factor: 0.84
Rated speed: 990 rpm
Efficiency: IE4 95.6%
IE efficiency class: IE4
Motor full-load efficiency: 95.6 %
Motor efficiency at 3/4 load: 95.6 %
Motor efficiency at 1/2 load: 94.7 %
Motor pole count: 6
Enclosure rating (IEC 34-5): 55 (Protect. water jets/dust)
){kind=link}