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Vacuum Sealing Assembly for 3.5" (89mm) OD Processing Tube - EQ-FL-89

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This is a pair of smart sealing assembly for tube vacuum furnace to tighten both ends of OD 3.5"  (88 mm - 90 mm ) tube without any welding and gluing.

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
  • Made of Stainless Steel with double high-temperature silicon O-rings on each flange.
  • On one end the flange has a vacuum meter with valve attached, and on the other end has only valve.
  • Seal tube by tightening screws on the flange without any welding and glue.
  • 1/4" hose connector in the both of ends.
  • 1/4" in diameter vacuum sealing assembly will connect with 1/4" rubber hose.
  • Designed for MTI GSL1600-80X tube furnace.
  • Excellent for any type of tubing: ceramic, glass, quartz and steel pipe.
  • The assembly kit will seal 88 - 89 mm diameter of ceramic tube.
Vaccum level
Optional Parts             
Installation Video
  • 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.
Optional Please click the picture below to choose other size flanges from 1" to 11"
Sealing flanges for 80mm O.D tube

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