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

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5.8 Q-H characteristic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 5.9 Flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 5.10 Flow head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 5.11 Plant charcteristic curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 5.12 Operating point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 5.13 Pressure drops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 5.14 Theoretical calculation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 6 Design of Centrifugal Pumps 6.1 Practical calculation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 6.1.1 Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 6.1.2 Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 6.1.3 Calculation of the NPSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 6.2 Characteristic curve interpretation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 6.3 Modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 6.3.1 Throttling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 6.3.2 Changing the speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 6.3.3 Reducing the impeller size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 6.3.4 Operation in parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 6.3.5 Operation in series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 6.4 Pumping of viscous media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 6.4.1 Correction for high viscosities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 6.4.2 Calculation of the correction factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 7 Design of Rotary Lobe Pumps 7.1 Fundamentals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 7.2 Pump rating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 7.3 Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 7.4 Rating the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 7.5 Result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 8 Annex 8.1 Diagram for the calculation of pressure drops . . . . . . . . . . . . . . . . . . . . .36 8.2 Pressure drops of fittings in metre equivalent pipe length . . . . . . . . . . .37 8.3 Pressure drops of valves in metre equivalent pipe length . . . . . . . . . . . .37 8.4 Vapour pressure table for water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 8.5 Pressure drops depending on viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 8.6 SI - Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45 8.7 Conversion table of foreign units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46 8.8 Viscosity table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 8.9 Mechanical seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49 8.10 Pump data sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51 8.11 Assembly instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 4 GEA Tuchenhagen Page
Preface Archimedes - the ingenious scientist of the ancient world - recognized the functionality of pumps as early as in the middle of the 3rd cent. B.C. Through the invention of the Archimedean screw, the irrigation of the fields became much more effective. 2200 years later GEA Tuchenhagen is building high-tech pumps for hygie- nic process technology giving the process lines the optimal impetus. Selecting the right pump to serve the purpose is not always that easy and requires special knowledge. GEA Tuchenhagen has set up this Manual for giving support in finding out the optimal pump design. Special attention was given to produce a Manual that is interesting and informative for 5 GEA Tuchenhagen everybody, from the competent engineer to the layman. The contents is self-explanatory and built up one after the other. Simplifications were partly accepted and profo- und theories dispensed with. We hope that this Manual will give you an extended comprehension of this subject and will help you solving any problems that might occur.
Page 1 and 2: Manual for the Design of Pipe Syste
Page 3: Table of Contents Page 1 General Pr
Page 7 and 8: 2 Introduction 2.1 Pipe systems 2.2
Page 9 and 10: 2.5 Applications 2.6 Capacity range
Page 11 and 12: 2.11 Self-priming centrifugal pumps
Page 13 and 14: 3.6 Fluid behaviour The flow curve
Page 15 and 16: 4.4 Friction losses 4.5 Reynolds nu
Page 17 and 18: 5.3 Suction pipe 5.4 Delivery pipe
Page 19 and 20: 5.7 Cavitation Fig. 14 - Pumping sy
Page 21 and 22: 5.9 Flow rate 5.10 Flow head 5.11 P
Page 23 and 24: Example 1 - Negative supply Hd,geo
Page 25 and 26: 6.1.2 Explanations 6.1.3 Calculatio
Page 27 and 28: Step 3 Step 4 The NPSH/Q Diagram (F
Page 29 and 30: 6.3.3 Reducing the impeller size 6.
Page 31 and 32: 6.4.2 Calculation of correction fac
Page 33 and 34: 7.3 Example Product data • Medium
Page 35 and 36: 7.5 Result 7. In diagram 4 (Fig. 32
Page 37 and 38: 8.2 Pressure drops of fittings in m
Page 39 and 40: 8.4 Vapour pressure table for water
Page 41 and 42: DN 40 200 Hv [m/100 m] 100 50 30 20
Page 43 and 44: DN 100 100 Hv [m/100 m] 50 30 20 10
Page 45 and 46: 8.6 SI - Units Legal units (Abstrac
Page 47 and 48: 8.8 Viscosity table (guideline valu
Page 49 and 50: 8.9 Mechanical seals (recommendatio
Page 51 and 52: 8.10 Pump data sheet Pumping medium
Page 53 and 54: Notes 53 GEA Tuchenhagen
Page 55 and 56:
55 GEA Tuchenhagen
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