Product solutions   Components   Shutters   Viewport shutters

Viewport shutters

Designed to protect system windows during processes such as vacuum deposition with 100% full closure option.

Utilising the magnetically coupled MagiDrive rotary feedthroughs for shutter actuation, the range can be actuated manually or pneumatically where remote control is required. 


The VPSFC range of viewport shutters provides 100% protection against the coating of viewports in HV and UHV deposition applications.

The range is available in either AutoClose, Pneumatic or Pneumatic with position-feedback options.


Viewport shutters can also be fitted with a pneumatically actuated MagiDrive. Used in their simplest form, they could be operated remotely from a control panel or switch. For more sophisticated protection, the pneumatically-actuated MagiDrive could be interlocked to the ‘vacuum process’, such that activating a deposition source, for example, would automatically close the viewport shutter. Furthermore, for critical applications, an optional ‘feedback-switch’ assembly can be fitted to the drive to confirm to the process controller that the shutter is in the closed position.

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Key features

  • Available on CF38 to CF150 flanges
  • Manual or pneumatic actuation
  • Fully bakeable to 250°C
  • Friction control system
  • 100% full closure option
  • Position switch option
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CADENAS models may differ from the latest product specification, please check with us prior to placing a purchase order.

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System mounting flange size (with clear holes) CF38 (2¾" OD CF)  CF64 (4½" OD CF) CF100 (6" OD CF) CF150 (8" OD CF) 
Blade aperture coverage (Standard) 88.40% 90.60% 84.00% 87.00%
Blade aperture coverage (Full Closure option) 100% 100% 100% 100%
Bakeout temperature  250°C with pneumatic cylinder removed
Pneumatic option - cylinder sweep set at 90 degrees (adjustable 30-170°)
Pneumatic option - cylinder switch 5-24V 2 wire reed switch
Pneumatic option - max rotation speed 0.5 seconds per 90o 0.5 seconds per 90o 1 second per 90o 1 second per 90o