The requirements made on process plants steadily increase, both regarding the quality of the products and the profitability of the processes. Making liquids flow solely due to the earth’s gravitational force is today unthinkable. Liquids are forced through pipes, valves, heat exchangers, filters and other components, and all of them cause an increased resistance of flow and thus pressure drops.
Pumps are therefore installed in different sections of a plant. The choice of the right pump at the right place is crucial and will be responsible for the success or failure of the process.
The following factors should be taken into consideration:
- Installation of the pump
- Suction and delivery pipes
- The pump type chosen must correspond to product viscosity, product density,
temperature, system pressure, material of the pump, shearing tendency of the
product etc.
- The pump size must conform to the flow rate, pressure, speed,
suction conditons etc.
As a manufacturer and supplier of centrifugal pumps and positive displacement pumps we offer the optimum for both applications. Generally spoken, the pump is a device that conveys a certain volume of a specific liquid from point A to point B within a unit of time.
For optimal pumping, it is essential before selecting the pump to have examined the pipe system very carefully as well as the liquid to be conveyed. Pipe systems have always special characterstics and must be closely inspected for the choice of the appropriate pump. Details as to considerations of pipe systems are given in Chapter 6, "Design of pumps".
Content overview:
- 1 General
Preface
Formula, Units, Designation
- 2 Introduction
2.1 Pipe systems
2.2 Liquids
2.3 Centrifugal pump or positive displacement pump
2.4 Tuchenhagen® VARIFLOW Programme
2.5 Applications
2.6 Capacity range
2.7 Design
2.8 Special features
2.9 Connection fittings
2.10 Accessories and Options
2.11 Liquid ring pumps
2.12 Rotary lobe pumps
- 3 Physical Fundamentals
3.1 Density
3.2 Temperature
3.3 Vapour pressure
3.4 Viscosity
3.5 Dynamic viscosity / Kinematice viscosity
3.6 Fluid behaviour
- 4 Hydraulic Fundamentals
4.1 Pressure
4.2 Atmospheric pressure
4.3 Relation of pressure to elevation
4.4 Friction losses
4.5 Reynolds number
- 5 Technical Fundamentals
5.1 Installation
5.2 Connection
5.3 Suction pipe
5.4 Delivery pipe
5.5 NPSH
5.6 Suction and delivery conditions
5.7 Cavitation
5.8 Q-H characteristic diagram
5.9 Flow rate
5.10 Flow head
5.11 Plant charcteristic curve
5.12 Operating point
5.13 Pressure drops
5.14 Theoretical calculation example
- 6 Design of Centrifugal Pumps
6.1 Practical calculation example
6.1.1 Calculation
6.1.2 Explanations
6.1.3 Calculation of the NPSH
6.2 Characteristic curve interpretation
6.3 Modification
6.3.1 Throttling
6.3.2 Changing the speed
6.3.3 Reducing the impeller size
6.3.4 Operation in parallel
6.3.5 Operation in series
6.4 Pumping of viscous media
6.4.1 Correction for high viscosities
6.4.2 Calculation of the correction factors
- 7 Design of Rotary Lobe Pumps
7.1 Fundamentals
7.2 Pump rating conditions
7.3 Example
7.4 Rating the pump
7.5 Result
- 8 Annex
8.1 Diagram for the calculation of pressure drops
8.2 Pressure drops of fittings in metre equivalent pipe length
8.3 Pressure drops of valves in metre equivalent pipe length
8.4 Vapour pressure table for water
8.5 Pressure drops depending on viscosity
8.6 SI - Units
8.7 Conversion table of foreign units
8.8 Viscosity table
8.9 Mechanical seals
8.10 Pump data sheet
8.11 Assembly instructions
If you like to order a copy of our "Manual for the Design of Pipe Systems and Pumps",
just write an email to juergen.r.henke@geagroup.com