4.5 Configuration and function
1
2
4
5
6
3
Fig. 2: Sectional drawing of the pump
1
Discharge nozzle
2
Plain bearing
3
Motor
4
Impeller
5
Suction nozzle
6
Motor shaft
The pump is designed with a radial fluid inlet and a radial outlet arranged on the
same axis. The impeller is rigidly connected to the motor shaft.
The motor housing is equipped with a terminal box. Mechanical sealing is not
required as the rotor is completely separate from the stator winding. The rotor is
lubricated and cooled by the fluid handled. The motor housing is made of
aluminium. Most of the internal parts are made of stainless steel. The advanced
lubricating system with high-quality carbon bearings combined with the precision-
balanced impeller ensure very smooth running and a long service life.
The fluid enters the pump via the suction nozzle (5) and is accelerated outward in a
cylindrical flow by the rotating impeller (4), which is driven by the motor shaft (6). In
the flow passage of the pump casing the kinetic energy of the fluid is converted into
pressure energy. The fluid is pumped to the discharge nozzle (1), where it leaves the
pump. The shaft runs in plain bearings (2), which are supported by the motor (3).
4.6 Noise characteristics
Table 5: Noise characteristics [dB A]
Sound pressure level
Rio-Eco (Therm) N 25-100 to 40-140
35 max.
Rio-Eco (Therm) N 50-70 to 80-120
50 max.
4.7 Scope of supply
Depending on the model, the following items are included in the scope of supply:
▪
Pump set
▪
Installation/operating manual
▪
Sealing elements
Design
Function
4 Description of the Pump (Set)
14 of 36
Rio-Eco N / Rio-Eco Z N / Rio-Eco Therm N
