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Vacuum Sealing Assembly for 82 mm dia Tube Furnace with Valve / Vacuum Meter - EQ-FL-82

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This is a pair of a smart sealing assembly for the tube vacuum furnace to tighten both ends of the OD 82 mm tube without any welding and gluing.

  • Made of Stainless Steel with double high-temperature silicon O-rings on each flange.
  • On one end the flange has a vacuum meter with a valve attached, and on the other end has the only valve.
  • Seal tube by tightening screws on the flange without any welding and glue.
  • 1/4" hose connector in both of ends.
  • 1/4" in diameter vacuum sealing assembly will connect with 1/4" rubber hose.
  • Excellent for any type of tubing: ceramic, mullite, glass, quartz and steel pipe.
  • The assembly kit will seal 82 - 84 mm diameter of Alumina or Mullite tube.
Package included One flange with gauge and valve, one flange with valve, two steel sealing rings, four high-temperature silicone O-rings ( 300oC Max.), and six screws
Vacuum level:
  • Must put a refractory tube block in front of the flange (see picture below) to avoid heat radiation melt silicone O-ring. You order a ceramic block in related products.
  • 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.
Installation video
Application Note
How to seal a quartz tube using the assembly, please follow the photos below:


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