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Purpose of the program

The VENT software is the component of the BST package and is intended for steady -state calculation of two-phase flow along a multi-segment pipeline.

VENT can also be used as standalone software. In this case it requires the MIXTURE software to be installed.

The friendly project-oriented interface makes use of VENT easier.

Handling data

VENT is based on the project concept. A project unites all the data necessary for simulation. A VENT project contains data on pipeline construction, hydraulic properties of pipe segments, parameters of simulation, and so forth. In addition it includes the reference to the corresponding MIXTURE project. Every separate project is saved in a data volume of the VENT data base.

Main features of VENT

The pipeline can contain up to 256 hydraulic elements. The following elements are available:

  • straight pipes,
  • elbows,
  • expanders and contractors,
  • valves and
  • rupture disks.

Every element is described by the appropriate set of parameters.

Flow models in a pipeline:

  • one- or two-phase homogeneous equilibrium or frozen for nozzle;
  • homogeneous equilibrium or non-equilibrium for pipes.


CPU: Intel Pentium 1200 MHz and faster, Memory: 512 MB, Disk space: 50 MB, CD-ROM: present,
OS: MS Windows  XP,  7, 8, 10

Important! When installing the VENT package the order of installation should be as follows: MIXTURE, VENT.


  1.  When installing the program under Windows 7 and higher we strongly recommend to use the default path  C:\Users\[username]\CISP\[program]
  2. When installing new versions of TSS applications one can meet the problem with Anti-virus tools you use.  Some of them may suspect that TSS programs are hazardous ones. Please don't worry. This may happen  due to new  powerful protection system (provided by  the Enigma Protector - one  of the world  leaders in this  area) which  sometimes causes alarm because anty-virus tools cannot look  inside the protected code. As a result the approcation will be blocked. To avoid such problem ask your IT service to exclude .Users\[username]\CISP  folder from virus  check  ​
    CISP guarantees that TSS is 100% clean, which means its applications do not contain any form of malware, including but not limited to: spyware, viruses, trojans and backdoor.
  3. Be aware - even if you are the licensed user of this program you will have to get new registration key. Please email us the request and don't forget to indicate your company and your name
  4. IMPORTANT! When installing VENT you should run setup.exe "As Administrator". The simple way to run it as an administrator in Windows 10 is to find the setup you want to run on the disk or CD, right click and select 'Run as administrator' 

Important! Be aware that on the expiration of the Warranty/maintenance Period the License on any TSS application remains valid for the version last updated during maintenance Period. Therefore if your maintenance has expired you wouldn't be able to use new updatesIf you nevertheless download the setup of new version and replace your working version with new one it won't work and you will lose working program! To avoid such situation check please whether you have valid maintenance before downloading any TSS program. 

Download latest version of Vent software 

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CISP Ltd., (ООО "Химинформ"), Saint-Petersburg, Russian Federation