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Viewport Shutters
Manual Actuation
Manually actuated viewport shutters are fitted with an external friction control system, ensuring
the blade remains in the desired position without the need for position locks.
Part Number Flange Size Dimension (mm)
A B C E
VPS38 CF38 (70 mm) 37.0 32.8 10.0 116.0
VPS64 CF64 (114 mm) 63.5 57.0 19.5 135.0
VPS100 CF100 (152 mm) 101.6 87.0 35.5 158.0
VPS150 CF150 (204 mm) 152.4 133.2 52.5 173.0
Manual ‘AutoClose’ shutters
The unique ‘AutoClose’ shutter safeguards viewport windows from accidental deposition. It
allows end-users to manually open the shutter for viewing, but upon release automatically closes,
protecting the window from accidental coating. ‘AutoClose’ motion is driven by an inherent
position bias with intrinsic deceleration. The ‘AutoClose’ prevents the costly and time-consuming
requirement to break vacuum in order to replace/clean windows accidentally coated. This is
particularly undesirable for UHV systems. ‘AutoClose’ shutters can be mounted in any orientation
and are bakeable to 250 °C
Viewport Shutters
Part Number Flange Size Dimension (mm)
A B C E
VPS38AC CF38 (70 mm) 37.0 32.8 10.0 116.0
VPS64AC CF64 (114 mm) 63.5 57.0 19.5 135.0
VPS100AC CF100 (152 mm) 101.6 87.0 35.5 158.0
VPS150AC CF150 (204 mm) 152.4 133.2 52.5 173.0
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