# Extracting the midpsan for a centrifugal pump
**URL:** https://discourse.paraview.org/t/extracting-the-midpsan-for-a-centrifugal-pump/16596
**Category:** ParaView Support
**Tags:** cfd
**Created:** [May 8, 2025, 9:12pm UTC](https://discourse.paraview.org/t/extracting-the-midpsan-for-a-centrifugal-pump/16596 "2025-05-08T21:12:14Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Roger1198](https://discourse.paraview.org/u/Roger1198)
#### Post date: [May 8, 2025, 9:12pm UTC](https://discourse.paraview.org/t/extracting-the-midpsan-for-a-centrifugal-pump/16596/1 "2025-05-08T21:12:14Z")
Hi, I was wondering if there was a way to extract the midspan (or any specified span) surface for a centrifugal pump system that comprises of an inducer and impeller. I’m familiar with doing this in ANSYS CFD Post, where you define a turbosurface, and the software then extracts a continuous surface (see attachment), which is quite convenient.
Appreciate your time and help! Thank you.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 12, 2025, 7:13am UTC](https://discourse.paraview.org/t/extracting-the-midpsan-for-a-centrifugal-pump/16596/2 "2025-05-12T07:13:48Z")
What is a midspan ?
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### Author:  [@honororjoseph](https://discourse.paraview.org/u/honororjoseph)
#### Post date: [July 9, 2025, 4:58am UTC](https://discourse.paraview.org/t/extracting-the-midpsan-for-a-centrifugal-pump/16596/3 "2025-07-09T04:58:02Z")
This is the middle surface between the bushing and the peripheral surface blade machine.