Mini gate valve

Exhibit no. 636

Gate valves are usually installed between the ion source and the high vacuum region of a mass analyzer to facilitate the cleaning and maintenance of the source while keeping high vacuum conditions in the rest of the instrument.

A gate valve opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little space along the tube axis and do not restrict the flow of fluid and the ion transmission when the gate is fully opened. 

The exhibit is electro-pneumatically actuated gate valve made by VAT, which was removed from MALDI-TOF Biflex II manufactured by Bruker Daltonics in the 1990s. It served as an isolation valve between the ion source and main analyzer chambers. The closing or opening time of the valve was 0.7 s and it required a constant supply of compressed air or nitrogen for its operation.

Wikipedia: Gate Valve

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