I can't believe it but it's true. Valve cross-section from Catalyst output with live velocity profile is now on my laptop's screen. Fantastic
I solved Python issue by turning back to version 2.6.6 (default on CentOS 6.5) and setting PATH, LD_LIBRARY_PATH and LD_PRELOAD as you recommended (naturally, paths are for python-2.6.6 that is installed in system directories). Paths are set in ".bash_profile" in user's home directory and EXPORT'ed. I think that the key moment is LD_PRELOAD that, if I get it right, tells the system to load python library for every process started so any program "sees" python symbols, including python itself.
ParaView was reconfigured and recompiled with "system" Python paths (for Python version 2.6.6). Code_Saturne not recompiled (it's built with "system" Python support).
If I will have enough time I will create and post a kind of manual for setting up Catalyst for Code_Saturne.
Great thanks for your help.