Single-stage glanded centrifugal pump in compact block design with directly flanged three-phase motor and one-piece shaft. With forced-flow circulation, bidirectional bellows mechanical seal and cavitation-reducing impeller. The pump is suitable for installation on a base.
Operating Data
Fluid media: Water 100 %
Fluid temperature: 20.00 °C
Requested flow:
Requested head:
Min. fluid temperature: -10 °C
Max. fluid temperature: 90 °C
Min. ambient temperature: 0 °C
Max. ambient temperature: 40 °C
Maximum operating pressure: 10 bar
Minimum efficiency index (MEI): ≥ 0.4
Motor data
Motor efficiency class: IE3
Mains connection: 3~400V/50 Hz
Voltage tolerance: +-10 %
Rated power: 25 kW
Rated speed: 2,900 1/min
Rated current: 46.5 A
Power factor: 0.87
Motor efficiency 50%: 92.8 %
Motor efficiency 75%: 93.3 %
Motor efficiency 100%: 93.1 %
Insulation class: F
Protection class: IP55
Motor protection: No
Materials
Pump housing: 1.4408
Impeller: 1.4408
Shaft: 1.4362
Shaft seal: Q1Q1VGG
Installation dimensions
Pipe connection on the suction side: DN 65, PN 10
Pipe connection on the discharge side: DN 50, PN 10
Ordering information
Brand: Wilo
Product description: BM-S 50/250-25/2
Net weight, approx.: 185 kg
Article number: 2103446
