Horizontal, multi-level, highly-efficient and non self-priming high-pressure multistage centrifugal pump with offline connections.

This non self-priming high-pressure multistage centrifugal pump has a compact design and is particularly efficient and user friendly. The standard-mounted IEC standard motor equipped with a PTC sensor, and our proprietary hydraulics ensure extremely high efficiency. It can be equipped with a stuffing box packing upon request, which can be swapped out without dismantling the pump thanks to its exclusive Twinner System packing construction.

Applications

The pump is suitable for use in professional irrigation/agriculture, water supply, pressure boosting, fire fighting and in the area of heating, air conditioning, cooling.

Special features / product benefits

• Extremely efficient hydraulics and highly-efficient IE3 motor with standard-mounted PTC sensor
• Pump set standard mounted with rigid coupling between motor and hydraulics and with mechanical seal
• Standard-mounted bypass flushing device guarantees a long service life for the mechanical seal
• Clever flange positioning and stuffing box gland upon request
• Bronze impellers upon request for high reliability

Scope of delivery

• Pump set for horizontal installation including motor, coupling, baseplate and pump
• Installation and operating instructions

Materials

• Pump housing
  EN-GJL-250/EN-GJS-400-15
• Shaft
  1.4028
• Shaft seal
  U2BPFG
• Impeller
  EN-GJL-200

Operating data

• Fluid media
  Water
• Min. fluid temperature T_min
  -5 °C
• Max. fluid temperature T_max
  90 °C
• Maximum operating pressure p
  63 bar
• Max. ambient temperature T_max
  40 °C

Motor data

• Shaft power P2(Q=max.) of selected impeller * number of pumps
  37000 W
• Rated speed n
  2900 rpm
• Rated current I_N
  67.80 A
• Motor efficiency η_M 50%
  92.6
• Motor efficiency η_M 75%
  93.8
• Motor efficiency η_M 100%
  93.8
• Power factor cos φ
  0.84

Installation dimensions

• Pipe connection on the suction side RPS
  DN 65
• Pipe connection on the pressure side RPD
  DN 50

Information for order placements

• Net weight, approx. m
  557 kg
• Brand
  Wilo
• Product description
  Zeox FIRST H 4211-37-2
• Article number
  4191825