Dear List members Could anyone please help with the following problem a colleague of mine is having. Cheers Steve We have an Isoprime with MultiFlow and are experiencing problems with the 6-way valve on the MultiFlow intermittently sticking when moving to the load position. We are aware that the Vici Valco valves (A4C4WT, 4-way; A4C6WT, 6-way) in the instrument are designed to operate at higher temperature (~300 degC) and are prone to sticking when operated at the lower temperatures used on the MultiFlow (~80 degC) and routinely clean the rotor when this occurs. We were wondering whether anyone else had experienced this problem and in particular whether anyone had come up with a more permanent solution (other than replacing the valves with lower temperature alternatives)? Cheers Paul Dr Paul Sutton Petroleum & Environmental Geochemistry Group School of Earth, Ocean & Environmental Sciences University of Plymouth Drake Circus Plymouth UK PL4 8AA Tel. +44(0)1752 233008/022 Fax. +44(0)1752 233035 email. [log in to unmask] webpage. http://www.research.plymouth.ac.uk/pegg/staff/sutton_pa/pasutton.htm <http://www.research.plymouth.ac.uk/pegg/staff/sutton_pa/pasutton.htm> ------------------------------------------------------------------------ ------------ Dr. Stephen Grimes Lecturer in Stable Isotope Geochemistry & Climate Change School of Earth Ocean and Environmental Sciences University of Plymouth Drake Circus Plymouth Devon PL4 8AA Office: Room 118 Fitzroy Building Tel. +44 (0)1752 233109 Fax. +44 (0)1752 233117 e-mail. [log in to unmask] Web page. http://www.plymouth.ac.uk/pages/dynamic.asp?page=staffdetails&id=sgrimes