Manual for the Design of Pipe Systems and Pumps - GEA ...

7.3 Example Product data
• Medium: Yeast
• Temperature: t = 10°C
• Viscosity: η = 100 cP
• Density: ρ = 1,000 kg/m3 • Portion of particles none
• Particle size none
• Single acting mechanical seal in the pairing carbon against stainless steel
Pumping data
• Q = 300 l/min.
• ∆p = 5 bar
• NPSH: 0.4 bar abs.
Selection of the pump size
The characteristic diagram (Fig. 30) may be used as a first step for the preliminary
selection of the pump type in question. For this purpose the required flow rate and the
known viscosity of the product are to be entered. According to this diagram, the VPSH 54 is
the suit able pump size. Now the pump can be examined more closely using the detailed
characteristic diagram (Fig. 31) shown on the next page.
1.000.000
100.000
10.000
Viscosity cP
1.000
Fig. 30
100
10
1
1 10 100 1.000
Volume flow l/min
33
GEA Tuchenhagen
42
52
44
64
62
54
300 l/min