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VacuGen 2.0  
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A collection of utilities designed to assist engineers, accountants and environmentalists associated with the generation and application of vacuum in process industries

VacuGen provides engineers with a large number of formulae in three spreadsheets. Many are interlinked to enable complex calculations to be rapidly performed using industry standard methods. This saves the time and inconvenience of having to find and then set up spreadsheets to use the formulae... VacuGen could pay for itself the very first time you use it!

VacuGen 2.0 is available for just 150 inc UK VAT (125 excl UK VAT)

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Software Specification
The software comprises three multi-page spreadsheets which are run under Microsoft Excel 2000 or newer.

A 30 day e-mail support service is provided.
The software comes with comprehensive electronic documentation and examples of usage. Customisable installation via state of the art setup software.
Please note that Microsoft Excel is not supplied with VacuGen.

Click here to down a non-functioning example of VacuGen Part 2 - "Vacuum Generation on Process Industries".
File size is 445Kb.

The functionality of each spreadsheet is listed below. 

1. Vacuum generation for process industry
This part deals with the question of "What is Process Vacuum". It provide basic knowledge and an introduction to vacuum.
  •  VCB0 Basic vacuum - contents list
  •  VCB1 Parameters specific to process operations in vacuum
  •  VCB2 Terms specific to vacuum process operations
  •  VCB3 Fundamental constants useful in vacuum technology
  •  VCB4 Basic gas equations and laws
  •  VCB5 Safety aspects pertaining to vacuum plants and their operation
2. Vacuum Generation in Process Industries
This part deals with the question "How to generate vacuum effectively". Provides "codified experience" to assist the vacuum engineer is specifying the optimum equipment.
  •  VG0 Vacuum Generation in Process Industries
  •  VG1 General aspects of process vacuum generation. Key references on Vacuum technology are given
  •  VG2 Composition and conditions of suction gas
  •  VG3 Saturation of vapour in gas mixtures
  •  VG4 Flow of gases and vapours in vacuum systems
  •  VG4.1 Calculation of pipe conductance for any gas flow in pipes. Streamline and molecular flow region.
  •  VG4.2 Conductance in Viscous Flow - Pressure region 1000 to 1 mbar
  •  VG4.3 Gas flow in the medium vacuum pressure region - 1 to 0.001 mbar. Intermediate or Knudsen gas flow.
  •  VG5 Friction in flow and pressure losses
  •  VG5.1 Calculation of friction factors
  •  VG5.2 Calculation of pressure losses in pipes
  •  VG5.3 Sizing process piping and selection of pipe components for single -  phase fluids
  •  VG5.4 Calculation of pressure loss when mass load and upstream pressures are known
  •  VG6 Vacuum plant design
  •  VG6.1 Selection of the vacuum pipe wall thickness
  •  VG6.2 Collapse by instability of thin cylindrical shells under external pressure.
  •  VG7 Air leakages in vacuum process plants
  •  VG7.1. Vacuum leakage determination of a vessel or plant - isolated plant pressure rise with time.
  •  VG7.1.1 Establishment of a large leak rate by pressure rise method - isolated vessel under vacuum
  •  VG7.1.2 Very small leak determination and testing in small plants and components. Escape of refrigerant from a small vacuum condenser and helium gas testing
  •  VG7.2. Air leakage values into vacuum plant
  •  VG7.2.1. Calculation of system air leakage due to porosity and weld cracks.
  •  VG7.2.2 Calculation of leakages for plant components
  •  VG7.2.3 Fluid leakage in a double packed seal with cooling fluid
  •  VG8 Pump down - Evacuation of plant or any vacuum system from atmospheric to the operating pressure
  •  VG8.1 Plant pump-down times
  •  VG8.1.1 Clean plant with negligible air leakage handling gas at ideal conditions
  •  VG8.2. Vacuum Pump Sizing for Evacuation of a Chamber
  •  VG8.2.1 Vacuum producer with two fixed capacities and considering air leakage.
  •  VG8.2.2 As VG8.2.1, but additionally the effect of the ultimate pressure of the second stage is considered
  •  VG8.3. Additional pump-down relationships
  •  VG8.3.1 Use of Gaede's equation with a pump speed curve (Pressure v Displacement/Pump Speed)

N.B. Application of above is pressure range from 1000 to 0.001 mbar

3. Vacuum Pumps and Vacuum Producing Systems - Rough and Medium Pressure Range
This part deals with the process of selecting vacuum pumps. In particular it is designed to assist the vacuum engineer answer the question "What is it going to cost to buy the correct vacuum producer and operate it ?".

Deals with process operations (1000 to 0.001 mbar), as mainly used in chemical, food, oil and pharmaceutical industries

  •  VPG0 Summary concerning Vacuum Pumps - Rough and Medium Pressure Range
  •  VPG0.1 Composition and conditions of suction gas
  •  VPG0.2 Saturation of gas/vapour mixtures
  •  VPG1.0 Details of water ring operated pumps
  •  VPG1.1 Water Ring Pumps Performance
  •  VPG1.2 The effect of the sealant parameters on pump performance
  •  VPG1.3 Vacuum pump capital and its utility costs
  •  VPG2.0 Liquid operated ring pumps (other than water)
  •  VPG2.1 The effect of the sealing liquid parameters on pump performance
  •  VPG3.0 Ejectors - Stream operated
  •  VPG3.1 Steam Jet Ejector Stage
  •  VPG4.0 Ejectors - operated by other fluids than steam
  •  VPG5.0 Roots Pumps
  •  VPG5.1 Use of Roots pump in combinations with backing pumps. Suction pressure to the Roots pump and system outlet pressures are known.
  •  VPG5.2 Use of Roots pump in combinations with backing pumps. Suction pressure to the Roots pump is to be calculated.
  •  VPG5.3 Approximate cost of Roots Vacuum Pumps and pumping sets v displacement
  •  VPG5.1G Graphs of speed for pump combination
  •  VPG6.0 Dry Running Rotary Vane Vacuum Pumps
  •  VPG7.0 Rotary Oil - Sealed Vacuum Pumps
  •  VPG7.1 Rotary oil sealed pumps
  •  VPG7.2 Water vapour tolerance of oil sealed rotary pumps
  •  VPG7.3 Water vapour tolerance of oil sealed vacuum pumps with gas ballast
  •  VG8.0 Dry Multistage Pumps
  •  VPG8.1 Selection of dry multistage pumps
  •  VPG9.0 Vapour Boosters
  •  VPG10.0 Condensers
  •  VPG10.1 Shell and tube vacuum condenser
  •  VPG11.0 Absorbers
  •  VPG11.1 Experimental water vapour absorption at 1 mbar
  •  VPG12.0 Selection, operation and capital costs of vacuum producing systems
  •  VG12.1 Vacuum pump system - component capital and utility costs
  •  VPG13.0 Utilities of the vacuum pumps
  •  VPG13.1 General gas compression relationships
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