Single-stage centrifugal pump as baseplate pump. With axial suction port and radial discharge port, for installation on a base. Pump with support foot and flanged bearing bracket, elastic spacer coupling, coupling guard and motor mounted to same baseplate.

IEC motor with 3 PTC thermistor sensors. Shaft sealing via non-cooled mechanical seal up to max. 120 °C. Spheroidal cast iron housing, stainless steel shaft, grey cast iron impeller (bronze impeller available at additional charge).

Materials

• Pump housing
  EN-GJL-250
• Shaft
  1.4028
• Shaft seal
  AQ1EGG

Operating data

• Min. fluid temperature T_min
  -20 °C
• Max. fluid temperature T_max
  120 °C
• Maximum operating pressure p
  16 bar
• Max. ambient temperature T_max
  40 °C
• Minimum efficiency index (MEI)
  0.4

Motor data

• Voltage tolerance
  ±10 %
• Motor efficiency class
  IE3
• Rated power P₂
  250000.0 W
• Rated speed n
  1480 rpm
• Rated current I_N
  436.00 A
• Power factor cos φ
  0.86
• Motor efficiency η_M 50%
  96
• Motor efficiency η_M 75%
  96.2
• Motor efficiency η_M 100%
  96.2
• Insulation class
  F

Installation dimensions

• Pipe connection on the suction side RPS
  DN 250
• Pipe connection on the pressure side RPD
  DN 250

Information for order placements

• Brand
  Wilo
• Net weight, approx. m
  2716 kg
• Product description
  CronoNorm-NLG 300/550-250/4
• Article number
  4461279