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Shutter, AccuFlex 4.50 CF Viewport

Viewport Shutter, AccuFlex 4.50 CF Flanged

Viewport Shutter, AccuFlex 4.50 CF Flanged

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AccuFlexTM, flexible viewport shutters offer 100% shielding for Conflat® CF Flanged fitted glass, quartz, and/or other substrate vacuum viewports used in vacuum evaporation and coating applications.

AccuFlex viewport shutters offer the largest port apertures available on the market today. Our unique flexible shutter design offers a full 90 degree shutter swing angle, when mated with CF flange ports having largest standard tube diameter... i.e. a 4.50 CF flange fitted with a 2.50 diameter tube and 2.37 diameter bore.

The flexible stainless steel foil shutter is designed for fast and easy replacement — for when extended coating process buildup begins to reduce shutter flexibility. See our shutter replacement /maintenance kits for more information.

Part Number:
Stock Level: 
in stock
Weight (lbs): 



Model Number: 
304 Stainless Steel, Aluminum
RoHS Compliant: 
Max. Bake Temperature: 
250 C
Max. Operating Temperature: 
250 C
Max. Vacuum Level: 
UHV to 1x10E-10 Torr
Flange OD: 
Length / Height: 
8.38 / 4.47 Inch
1.63 Inch Actuator Diameter
Depth / Thickness: 
.68 Double-Sided Flange Thickness
2.18 Aperture
Non-Stocked Lead Time: 
10-15 Days
Other Information: 

Bellows Sealead, Manual Actuator

Detailed images

Viewport Shutter, AccuFlex 4.50 CF Flanged