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Vacuum Sealing Assembly for 3" ( 76 mm ) dia Tube Furnace with Valve / Vacuum Meter - EQ-FL-76

In stock
Item Number: EQ-FL-76

Quantity Discounts

2 to 5USD$663.10
6 to 9USD$628.20
10 or moreUSD$593.30

This is a pair of smart sealing assembly for tube vacuum furnace to tighten both ends of OD 3" 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  ( 300°C Max., and six screws

  • Made of Stainless Steel with double high-temperature silicon O-rings on each flange.
  • One end flange has a vacuum meter with valve , and another end  has valve.
  • Seal tube by tightening screws on the flange without any welding and glue.
  • 1/4" in diameter vacuum sealing assembly will connect with 1/4" rubber hose.
  • Designed for MTI OTF-1200X3 3" Quartz Tube Furnace.
  • Excellent for any type of tubing: ceramic, glass, quartz and steel pipe.
Vacuum Level

Optional Parts

Installation Video

  click to enlarge

  • Must put a refractory tube block in front of the flange ( see picture below ) to avoid heat radiation melt silicone O-ring. Please click picture below-center to order the block.
  • 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.
 ( click pic to choose)
Sealing flanges for 40 - 42 mm O.D tube                     Stainless Steel Vacuum Fittings, Pipes & Valves                       Vacuum pump and high vacuum station       
 other size flange           Vacuum Fitting,  Valve & Feedthrough                  
 Vacuum Pumps

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1. Prices listed online are valid for US market and whom pay by credit card only. There will be extra charges for shipping & handling. Price various from country to country.
2. We may add extra charges for paper order and net30 terms due to extra labor cost.
3. The prices listed are subject to change without notice.