Helium compressor CTI-Cryogenics 8300

Dear all,

We have a CTI-Cryogenics 8300 helium compressor that needs to be
serviced but Helix Technology does not give support to this model any
more.
Does anybody know any european company who might service it?It has a
problem with a valve on the expander.

Thank you in advance

Virginia Soares
INESC-MN
Rua Alves Redol,9
1000-029 Lisboa
Portugal
Tel:+351 21 310 00 300
Fax:+351 21 314 58 43
url:www.inesc-mn.pt