Rough / Medium Vacuum

The generation of rough and medium vacuum.

Pfeiffer Vacuum's rough and medium vacuum 166 page handbook contains technical information on the design and function of Roots and Rotary Vane Pumps. It provides key vacuum calculations such as volume flow rates, power consumption and pump down times to name a few.

1 Rotary Vane Vacuum Pumps
1.1 Design and Function
1.2 Accessories

2 Roots Vacuum Pumps
2.1 Design and Function
2.2 Design and Function of the Circulatory Gas Cooled
Roots Vacuum Pumps (WGK)
2.3 Special Equipment and Accessories

3 Liquid Ring Vacuum Pumps
3.1 Design and Function
3.2 Fresh Fluid Operations
3.3 Combined Fluid Operations
3.4 Closed – Circuit Fluid Operations

4 Condensers
4.1 Design and Function
4.2 Condenser Calculations

5 Heat Exchangers
5.1 Design and Function
5.2 Heat Exchanger Calculations

6 Backing Pump Selection

7 Calculations
7.1 Power Consumption of a Roots Vacuum Pump
7.2 Volume Flow Rate of a Roots Vacuum Pumping Station
7.2.1 Calculating the Volume Flow Rate of a WOD 220 A Pumping Station
7.3 Volumetric Efficiency Rating
7.4 Conductance Calculations
7.5 Pump Down Times
7.6 The Influence of Leaks on Pump Down Times and End Vacuum
(Leak Rate)
7.7 Drying Process
7.8 Boyle-Mariotte Law
7.9 Selecting a Vacuum Pumping Station

8 Appendix
8.1 Graphical Symbols in Vacuum Technology
8.2 Definition of terms in Vacuum Technology
8.3 Operating medium
8.4 Conversion Tables
8.5 Data on Various Substances
8.6 Desorption Rates on Clean Surfaces
8.7 Correction Factor a
8.8 Technical Data, Rotary Vane Vacuum Pumps
8.9 Technical Data, Roots Vacuum Pumps WKP
8.10 Technical Data, Roots Vacuum Pumping Stations

9 Technical Formulas

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