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Vacuum Sealing Flange with Quartz Observation Window 100mm -EQ-FL-100W

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This is a smart sealing assembly w/ quartz observation window. Users can check the inside of a reaction chamber without interrupting the process. The flange has three sizes that fit 100 - 102 mm O.D processing tube. Check in the options bar.


Package included One flange with gauge and valve, one steel sealing rings, two high-temperature silicone O-rings  ( 300oC Max.), and three screws, as well as the observation window.
  • Made of 304 Stainless Steel with double high-temperature silicon O-rings on each flange.
  • 30 mm dia. UV grade quartz view window is installed in the center of the flange.
  • Dial Vacuum gauge and valve are installed on side of the flange.
  • 1/4" hose Nipple is connected to the valve.
  • Excellent for any type of tubing: ceramic, glass, quartz, and steel pipe.
  • The assembly kit will seal a 100-102 mm diameter alumina and quartz tube.
Installation Video
  • The refractory tube blocks must be placed in front of the flange (see picture below) to avoid heat radiation melting the silicone O-ring. Customers may order a ceramic block from related products below.
  • A water cooling flange with a view window is available upon request.
  • Two flanges with a view window are needed for viewing through the tube.
  • Please do not over tighten the three hex screws on the flanges to avoid overpressure incidents. The recommended torque is 35~40 inch-lbs.
  • For liability considerations, MTI does not recommend or endorse the use of any toxic, flammable or corrosive gases with our flange assemblies. Please contact us with any concerns.

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