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
  5.1301, EN-GJL-250
• Impeller
  CC480K, G-CuSn10
• Shaft
  1.4028, X30Cr13

Operating data

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

Motor data

• Shaft power P2(Q=max.) of selected impeller * number of pumps
  250000 W
• 436.0 A
• Motor efficiency ηm 50 % η_m50%
  96
• Motor efficiency ηm 75 % η_m75%
  96.2
• Motor efficiency ηm 100 % η_m100%
  96.2
• Power factor cos φ
  0.86

Installation dimensions

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

Information on placed orders

• Brand
  Wilo
• Net weight, approx. m
  2716.00 kg
• Product description
  CronoNorm-NLG 300/550-250/4
• Article number
  4461279