Exposition

Quarter swing butterfly valve

Exhibit no. 966

Butterfly valves are reliable, high conductance vacuum isolation valves whose closing mechanism takes the form of a disk.

They consist of a stainless steel body, O-ring sealed valve plate, and a shaft. Butterfly valves require only one-quarter turn rotation of the handle to go from fully open to the fully closed position. The operation is similar to that of a ball valve, which allows for quick shut off.

The picture shows Model QSB 160 manufactured by Edwards High Vacuum. The valve was a part of the ZAB-EQ spectrometer (manufactured by VG Analytical LTD in 1986), where it served for isolating the ion source housing from the diffusion pump.

This website uses cookies to ensure you get the best experience on our website.

Agree