Xylem LOWARA DDC 4.2 PWM

The Xylem DDC is an electronically commutated spherical motor pump with a running time of well over 50,000 hours at a nominal voltage of 12 volts.

There is no conventional shaft with shaft bearings and shaft seals. The only moving part in a spherical motor pump is a spherically shaped rotor/impeller unit, which rests on an ultra-hard, wear-resistant ceramic bearing ball. The bearing is therefore self-adjusting. Bearing play, and thus an increase in noise, is impossible due to the design principle. The pump therefore remains quiet throughout its entire operation.

The bearing is lubricated directly by the pumped medium (wet rotor pump). Maintenance is therefore eliminated. Blocking of the pump is normally impossible. Reliable start-up is possible even after extended downtime.

The permanent-magnet rotor/impeller unit is driven by a magnetic field generated by the surrounding stator. The stator is built entirely around the rotor, eliminating the need for complex, separate magnetic shielding in most cases. The complete pump is very compact, and at 39 mm, only slightly taller than the stator itself.

The spherical motor principle enables economical operation with comparatively high performance. By varying the voltage, the DDC DC pump can be easily controlled over a wide performance range. All parts in contact with the fluid are completely corrosion-resistant. A tachometer output allows the pump's speed to be directly monitored.

Technical data:

Model: DDC4.2P
Dimensions: (LxWxH) 92 x 70 x 39mm
Motor type: Electronically commutated spherical motor
Rated voltage: 12 V DC
Starting current: up to 4.5 A (short-term)
Power consumption: 18 W
Delivery head at 12V: 5.2m
max. flow rate: 1000L/h
Pumped media: water, water-glycol mixtures
Max. system temperature: 60° C
System pressure: max. 1.5 bar
Connections: 2x 3/8" hose nozzle
Connections: 4-pin Molex, 4-pin PWM