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Right side flange with KF-25 port & 1/4" barbed hose fitting for 2" Tube - EQ-FL-50KF25-FT(R)

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This is the left side of the smart sealing assembly for 2" vacuum tube furnace to seal one end of OD 50-52 mm ( 2")  tube without any welding and gluing.


  • Seal tube by tightening screws on the flange without any welding and glue.
  • Made of Stainless Steel ( SS304)  with double high-temperature silicon O-rings on each flange.
  • Click picture left to order 1/4" diameter thermal couple for the feedthrough at extra cost.
  • Click picture below-righ to order digital vacuum gauge for mechanical gauge replacement.
  • You may order quick connected flange for another end of flange.
  • 1/4"ID Thermal couple or any tube/rod  Feedthrough
  • Mechanical Pressure Gauge
  • 1/8" NPS Valve
  • Barbed Fitting for 10mm O.D. tube.
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

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