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Series XRW 400

Sulzer submersible mixer XRW 400

Compact submersible mixer, designed to achieve an optimum flow pattern in a wide range of mixing and stirring applications, in large tanks and open waters.


The submersible mixer is designed as a compact, water-pressure-tight unit, including propeller and integrally casted installation bracket for attachment to a square guide tube.


Premium Efficiency, IE3 equivalent, sensorless permanent-magnet motor with high overload capacity; 50 Hz; 10-pole; 400 V* using variable frequency drive (VFD) control. Protection type IP 68, with stator insulation Class F. Start-up: variable frequency drive (VFD). Max. submergence 20 m. * other voltages available


Technically optimized, axially operating 3-blade propeller, designed to achieve high thrust and therefore a high flow capacity in an axial direction. The propeller is self-cleaning and so ensures vibration-free operation.

Solids deflection ring

Enhanced solids deflection ring design. The patented solids deflection ring protects the mechanical seal from damage by ingress of solid or fibrous matter.


All bearings are lubricated-for-life and maintenance-free, with a calculated lifetime of more than 100,000 h.

Shaft sealing

Sic-Sic, covered mechanical seal at medium side. NBR O-rings and lip seals.

Seal monitoring

DI-system with sensors in the oil**, motor and cable connection chambers.

Temperature monitoring

PTC thermistor in the stator which opens at 140 °C.


10 m sewage-resistant EMV-FC S1BC4N8-F ..G.. 0,6/1 kV. Optional lengths (m): 15, 20, 30, 40, 50.


Explosion-proof version, additional seal (Sic-C) at motor side, flow ring, seals in viton, vertical angle adjustment, vortex shield, vibration damper, lifting hoop.


80 kg. With flow ring add 10 kg. ** not in Ex version.


System data

Motor PM 30/10 PM 50/10
Rated power (kW) 3.0 5.0
Motor efficiency (%) 93.0 91.0
Variable Frequency Drive (VFD) A B
Rated power (kW) 3.0 5.5
Rated current (A) at 400 V 6.2 9.5
Total system efficiency (%) 89.1 86.6

Mixer performance

Hydraulic № Mixer power PP in kW Motor kW
4031A 1.2 3.0
4032A 1.5 3.0
4033A 1.8 3.0
4034A 2.2 3.0
4035A 2.6 3.0
4031B 3.0 5.0
4032B 3.5 5.0
4033B 4.0 5.0
4034B 4.5 5.0
4051A* 1.2 3.0
4052A* 1.5 3.0
4053A* 1.8 3.0
4054A* 2.2 3.0
4055A* 2.6 3.0
4051B* 3.0 5.0
4052B* 3.5 5.0
4053B* 4.0 5.0
4054B* 4.5 5.0

*with flow ring


Motor housing 1.4404 (AISI 316L)
Sliding bracket 1.4470 (AISI 329) / polyamide (CF-8M)
Motor shaft 1.4401 (AISI 316)
Propeller 1.4571 (AISI 316Ti)
Fasteners 1.4401 (AISI 316)
Lifting band 1.4571 (AISI 316Ti)