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

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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